Plastic House Research Articles

Effect of levels organic fertilizers and kinds of Bio-feritilizers in characterical of two classes of Okra plant ( Abelmoschus esculentus L.) growning in the plastic house

The experiment was carried out for the agricultural season 2020-2021 under unheated greenhouse conditions at the Agricultural Research Station of the Department of Horticulture and Garden Engineering / College of Agriculture - University of Dhi Qar, studying the effect of levels of organic and biological fertilizers on the growth and yield of two okra varieties (Al-Hussainawi, Petra). The experiment was carried out with three factors: the first cultivar includes two okra cultivars (Al-Hussainawi A, Petra B), the second sheep manure with four levels O0 without addition, O1 (2.5 kg experimental unit), O2 (5 kg experimental unit) and O3 (7.5 kg experimental unit) and the third is a mixture of bio-fertilizer And at four levels: O0 without addition, A(Azo.) (Azotobacter chroococcum): at a concentration of 1.1×109, B(Pseu.): (Pseudomonas flourescens) at a concentration of 3.6×109 and C (Azo.+Pse.): (Azotobacter chroococcum + Pseudomonas flourescens) at a concentration. 4.7 × 109 The arithmetic averages were compared according to the LSD Least Significant Difference test at a probability level of 0.05. The results can be summarized as follows: It showed the superiority of the Husseinawi okra variety over the Petra okra variety in the leaf content of carbohydrates and phenols in the fruits, which amounted to (12.448 mg 100 gm-1, 2.132%). ) respectively. While the Petra cultivar was superior in the content of leaves of chlorophyll and a decrease in the content of the leaves of carotene and proline, it reached (69.615 mg 100 gm-1, 1.882 mg 100 gm-1, 190.0 microgram g-1). With regard to the organic fertilizer, the treatment O3 (7.5 kg experimental unit) for Al-Hussainawi variety was superior in the content of leaves of chlorophyll and phenols in the fruits, it amounted to (74,729 mg 100 gm-1, 2.742 %), while the Petra variety excelled in the content of carbohydrates and the low content of the leaves of carotene and proline. It reached (14,394 mg 100 g-1, 0.951 mg 100 g-1, 142.9 mcg g-1) respectively. As for the biofertilizer, the treatment C (Azo.+Pse.) was superior in the leaves content of chlorophyll and carbohydrates, and the leaves content of carotene, proline and phenols in the fruits was (72,555 mg 100 g-1, 13.683 mg 100 g-1, 0.974 mg 100 g-1, 156.7 micrograms g-1, 2.534%) respectively. As for the effect of the bilateral interaction between okra cultivars and biofertilizer types, the BC (Azo.+Pse.) treatment was superior to the chlorophyll content of leaves and the decrease in the leaves’ content of carotene and proline, it amounted to (72,996 mg 100 g-1, 0.762 mg 100 g-1, 136.2 micrograms g-1), while the AC (Azo.+Pse.) treatment excelled in the leaves content of carbohydrates and phenols in fruits, it reached (13.878 mg/100 gm-1, 2.576 %), respectively. The bilateral interaction between organic and biofertilizers showed the superiority of O3 C (Azo.+Pse.) treatment in the leaves content of chlorophyll and carbohydrates, and the decrease in the leaves’ content in carotene, proline and phenols in fruits, it amounted to (77,065 mg 100 g-1, 15.722 mg 100 g-1, 0.297 mg (100 gm-1, 121.6 mcg g-1, 3.4088%) respectively. The triple interactions showed a significant effect on most of the studied traits.

Effect of levels organic fertilizers and kinds of Bio-feritilizers in characterical of two classes of Okra plant ( Abelmoschus esculentus L.) growning in the plastic house

Effect of levels organic fertilizers and kinds of Bio-feritilizers in characterical of two classes of Okra plant ( Abelmoschus esculentus L.) growning in the plastic house

PERAN ANTIOKSIDAN DALAM MENGATASI CEKAMAN KEKERINGAN PADA TANAMAN KEDELAI (Glycine max (L.) Merril)

The decreasing of soybean production full fill of soybean in Indonesia, one of the main causes is the decreasing of land farming area. To increase the production of soybean in Indonesia can be reached by the expansion of planting areas,use potential land. This research has held in plastic house Agriculture Faculty, University of Sumatera Utara, Medan on altitude +32 meters above sea level, to August 2016 until November 2016,using factorial rendomized block design with 2 factors.The first factor is drought stress with 3 levelsof KL 80% ; KL 60% ; KL 40% and the second factor is apllication antioxidants with 2 kind of Ascorbic Acid and Salicylic Acid.The result of this research showed that drought stresswere significantly effect to leaf area, the number of pods fullness per plant, dry weight of seeds per plant and dry weight of 100 seeds. Apllication antioxidantswere significantly effect to chlorophyll a, chlorophyll b, thenumber of pods fullness per plant, dry weight of seeds per plant and dry weight of 100 seeds.Interaction of drought stress and application antioxidant were significantly effect to dry weight of seeds per plant and dry weight of 100 seeds.

Induction of Systemic Resistance in Tomato Plants Against Tomato yellow leaf curl virus in Protected Cultivation Using a Local Bacterial Isolate of Bacillus subtilis

Ghanem, H.M., E.H. Akel, Q.A. Al-Rhayeh and I.D. Ismail. 2021. Induction of Systemic Resistance in Tomato Plants Against Tomato yellow leaf curl virus in Protected Cultivation Using a Local Bacterial Isolate of Bacillus subtilis. Arab Journal of Plant Protection, 39(4): 289-295. https://doi.org/10.22268/AJPP-039.4.289295 This study was conducted at the Agricultural Scientific Research Center in Lattakia Governorate in a plastic house during the 2020/2021 growing season to evaluate the efficiency of the native bacterial isolate B.Ra.217 of Bacillus subtilis, in reducing infection of tomato plants with Tomato yellow leaf curl virus (TYLCV), by treating tomato seeds and later watering the seedlings with a suspension of the tested bacteria at a concentration of 1x109 /ml, and then measuring incidence (%) and severity of virus infection, and estimating peroxidase enzyme activity. The results showed that 30 days after inoculation with tomato leaf curl virus, a decrease in virus infection rate and severity in virus-infected and bacteria-treated plants compared with virus-infected and untreated control plants was observed. The reduction in disease incidence and severity of infection reached 26.67% and 34.28%, respectively, with significant differences between the treatments. In addition, the activity of peroxidase enzyme 7 days after infection with the virus showed an increase in plants treated with bacteria only (0.1342 μmol/mg) and those treated with bacteria and virus-infected (0.0913 μmol/mg), compared with the healthy control plants (0.0958 μmol/mg), and virus-infected and untreated with bacteria (0.0570 µmol/mg). The results also showed 15 days after infection that the enzyme activity was higher in plants treated with bacteria only (0.1592 µmol/mg) compared with the healthy control (0.1415 µmol/mg) with significant differences, and also the differences were significant with the untreated infected plants (0.1002 µmol/mg), and with inoculated and treated plants (0.1372 µmol/mg). Thus, this bacterial isolate may have an important applied role in enhancing tomato plant resistance to the virus and consequently reducing its damage. Keywords: Bacillus subtilis B.Ra.217, TYLCV, peroxidase, incidence, severity of infestation, tomato plant

Effect of Tomato Yellow Leaf Curl Virus Infection on Some Growth Indicators of Pepper Hybrids Grown Under Plastic House Conditions in Lattakia Governorate, Syria

Hamdan, R.S., I.D. Ismail and I. Akel. 2021. Effect of Tomato Yellow Leaf Curl Virus Infection on Some Growth Indicators of Pepper Hybrids Grown Under Plastic House Conditions in Lattakia Governorate, Syria. Arab Journal of Plant Protection, 39(4): 309-316. https://doi.org/10.22268/AJPP-39.4.309316 This study aimed to evaluate the effect of Tomato yellow leaf curl virus (TYLCV) infection on some growth parameters of several pepper hybrids grown under protected cultivation along the Syrian coast. Four pepper hybrids (Capsicum annum) were tested, two hot (Lahab, Sirad) and two sweet (Nevada, Dallas) peppers. The research was carried out during the 2020-2021 growing season in a plastic house at the Agriculture Scientific Research Center in Lattakia, using a randomized complete block design, with 8 treatments, three replicates and 5 plants per replicate. The results obtained showed that the sweet pepper hybrids (Nevada, Dallas) were more sensitive to infection with Tomato yellow leaf curl virus than the hot pepper hybrids (Lahab, Sirad), without significant differences among them. The pepper hybrid Nevada did not show any apparent symptoms, and the effect of the virus on some growth parameters (number flowers, flower setting, and the leaf surface area) was evident in comparison with other hybrids, but the differences were not significant. The Dallas, Sirad and Lahab pepper hybrids showed visible symptoms in response to infection with infection rate of 93.33%, 80% and 80%, respectively. The effect of virus infection on the growth parameters of these hybrids was variable. The reduction in the flowers number of Nevada, Dallas, Cirad and Lahab after 45 days of infection was 33%, 31.10%, 10.23% and 5.07%, respectively, and also with a reduction in the number of flowers setting of 77.39%, 20.87%, 23.33% and 66.68%, respectively. The same was true for the leaf surface area, where reduction rate for the Nevada, Dallas, Sirad and Lahab hybrids 30 days after infection was 48.17%, 53.06%, 16.45% and 36.6%, respectively. Keywords: Tomato yellow leaf curl virus, pepper hybrids, growth parameter, host resistance, protected agriculture.

Utilisation of a 3D printed ex vivo flexor tendon model to improve surgical training

Surgery for hand trauma accounts for a significant proportion of the plastic surgery trainee activity. The aim of this article is to create a standardised simulation training module for flexor tendon repair techniques for residents prior to their first encounter in the clinical setting.A step-ladder approach flexor tendon repair training with four levels of difficulty was conducted using a three-dimensional (3D) printed anatomical simulation model and a silicone tendon rod on a cohort of 28 plastic surgery Senior House Officers (SHOs) of various stages in their training (n=28). Assessment of knowledge (online questionnaire) and practical skills using validated score systems (global rating scale and task specific score) was performed at the beginning and end of the module by hand experts of our unit.The overall average knowledge-based scores of the cohort pre- and post-assessment were 1.48/5 (29.6%) and 3.56/5 (71.5%), respectively. The overall average skills-based scores of the cohort pre- and post-assessments were 3.05/5 (61%) and 4.12/5 (82.5%), respectively. Significant (p<0.01) difference of improvement of knowledge and skills was noted on all trainees. All trainees confirmed that the training module improved their confidence with flexor tendon repair.We demonstrate a standardised simulation training framework that employs a 3D printed flexor tendon simulation model proven to improve the skills of residents especially during their early learning curve and which paves the way to a more universal, standardised and validated training across hand surgery.

IMPROVEMENT, PRODUCTIVITY, FRUIT QUALITY AND STORABILITY OF CHERRY TOMATO VIA FOLIAR APPLICATION WITH DIFFERENT CALCIUM SOURCES AND SOME MICRONUTRIENTS

Two plastic house and Handling Lab. experiments were concluded in 2018/2019 and 2019/2020 seasons at the Experimental Farm of El-Kassasein, Res. Station, Hort, Res. Inst., Agric. Center, Ismailia Governorate, Egypt, it aims to study the effect of different sources of calcium, some micronutrients (boron and molybdenum) and their interaction as foliar spray on growth, yield, fruit quality and storability of tomato cherry under sandy soil conditions using drip irrigation system. The obtained result show that, the interaction between spraying plants with calcium citrate ( Ca-Cit) at 2 % and boron (B) at 25 ppm recorded the highest value of dry weight of shoots / plant , average fruit weight , yield / plant and total yield / m2 , lycopen and vitamin C content in fruits at harvest time in both seasons, where foliar application by the interaction between calcium chloride ( CaCl2) at 2% and B at 25 ppm had significantly increased number of fruits / plant, DM%, fruit firmness, TSS, Ca and B contents in fruits. The highest value of Mo concentration in fruits were recorded with the interaction between Ca-citrate and Mo at 5 ppm. The increases in total yield / m2 were about 2.033 and 2.642 kg for the interaction between spraying with Ca-Cit at 2 % and B at 25 ppm, 1.639 and 1.474 kg for the interaction between calcium chloride at 2% and B at 25 ppm and 1.434 and 1.436 kg for the interaction between calcium tartrate at 2% and B at 25 ppm over the unsprayed plants in the 1st and 2nd seasons, respectively. As for storability of fruits which stored in carton box at 8°C and 90-95 % RH, fresh weight loss (%) and TSS in fruits increased, whereas fruit firmness, titratable acidity and vitamin C in fruits decreased with prolonging cold storage periods for all treatments. Storage of fruits produced from plants which sprayed with Ca Cl2 at 2 % and B at 25 ppm pre harvested gave the highest values of TSS, fruit firmness and gave lowest values of titratable acidity, whereas the interaction between Ca-Cit at 2 % and B at 25 ppm gave the highest value of vitamin C and lowest value of weight loss percentage in fruit during storage period. The interaction between foliar application of the calcium citrate or calcium chloride 2 % and boron 25 ppm is recommended for high yield, best fruit quality and prolonged storability of cherry tomato.

Effect of Ethephone, Zinc and Boron on growth and Yield of Cucumber (Cucumis Melo var. Flexuosus) Cultivated in Plastic Houses and The Economic Feasibility From That

A field experiment was carried out in one of the plastic houses belonging to the College of Agriculture, Al-Qasim green University to Studying the possibility of cultivating cucumis melo var. flexuosus inside greenhouses to improve growth and yield using microelements and ethephon. Microelements (Zn + B) at a concentration of 250 mg/L -1 and the growth regulator Elathyphon at a concentration of (2.5, 1.5, 0) ml/L -1 were used as a spray on the shoots. A factorial experiment was applied with the split plot system and randomized complete block design (RCBD) according to the least significant difference (L.S.D) test under the significance level of 0.05. The results were as follows: The interaction between (Zn + B) had a positive and significant effect on indicators such as leaf area 206.88 dm-1, number of female flowers 22.33flower-1, and the total yield 4327 kg, the percentage of nitrogen, phosphorous and potassium in the leaves was 0.6733, 2.691, 2.927, and the percentage of zinc and boron in the leaves was 19.626,14.282.The yield of one plant and the weight of the fruit 2575.5 g, 121.44 g, respectively. As for the interaction between Zn + B + 1.5, a significant effect on leaf area trait 239.91 Number of female flowers 26.33 flower-1, Total yield 5494 kg The percentage of PK in leaves 0.7233,3.080 and the percentage of boron in leaves 14.560 while the yield of one plant 3270.4 g

Agronomic response of kangkung plants typical of Lombok Island with a hydroponic system treated with Trichoderma bionutrients

The kangkung (Ipomoea aquatica Forsk) is water spinach typical of Lombok Island, Indonesia with a crunchy texture and distinctive taste. It is very easy to be cultivated in the home garden organically in soil media, also to be planted hydroponically and aquaponically. Hydroponic system cultivation is the cultivation of plants by utilizing water without using soil with an emphasis on meeting the nutritional needs of plants. One of the nutrients that has good prospects is the Trichoderma bionutrient which is made from a mixture of bioactivator and biourin. The purpose of this study was to determine the agronomic response of water spinach plants typical of Lombok Island with a hydroponic system treated with Trichoderma bionutrients. The study used an experimental method carried out in a plastic house with a hydroponic system. The study used a completely randomized design with hydroponic nutrition treatment consisting of 6 levels, namely: without bionutrients, with bioactivator bionutrients, with biourin bionutrients, with a mixture of bioactivator and biourin, with AB mix nutrition, with a mixture of Trichoderma bionutrients and Ab mix nutrients. Each treatment was repeated 4 times so that there were 24 experimental units. The results showed that the treatment with a mixture of bionutrients with a mixture of bioactivators and Trichoderma biourin was as good as AB mix nutrition in promoting growth and wet weight of kangkung typical of Lombok Island.

Effect of Spraying With Benzyl Adenine and Licorice Root Extract on Some Vegetative Growth Characteristics and Chemical Content of Strawberry (Fragaria Ananassa Duch) CV. Rubygem

This study was conducted inside the plastic house of the Agricultural Research and Experiment Station of the Agriculture College - University of Kirkuk/Iraq, during the growing season 2020/2021. To study the effect of spraying the growth regulator of benzyl adenine in three concentrations (0, 30, 60) mg.L−1 and licorice root extract in three concentrations (0, 3000, 6000) mg.L−1 on some growth characteristics and chemical content of strawberry plants of Rubygem type. The obtained results were summarized that spraying with a concentration of 60 mg.L−1 of the growth regulator benzyl adenine BA led to a significant superiority in most growth characteristics and chemical content of strawberry plants (leaf area, leaves number, leaves area, dry matter in plant, leaf content of chlorophyll and nitrogen total) where reached (95.81 cm2, 15.78 leaf. plant−1, 1513.93 cm2, 38.68 %, 28.66 %, 3.24 %) respectively. While spraying with concentrations (30 and 60 mg.L−1)of benzyl adenine was significantly superior to the control treatment in the phosphorous and carbohydrates content of leaves. Spraying with a concentration of 6000 mg.L−1 of licorice extract significantly increased in most of the study traits (dry matter in plant, leaf content of chlorophyll, nitrogen, phosphorous and carbohydrates total) where reached (39.06 %, 25.69 mg.g−1, 3.09 %, 0.334 %, 3.38 %) respectively. Spraying with a concentration of 3000 mg.L−1 of licorice was significantly superior in the characteristics of leaf area and Leaves area, which reached (85.08, 1303.18) cm2 respectively.

The Effect of Spraying With Calcium, Boron and Benzyl Adenine on The Quantity and Quality of Yield for Strawberry Plants (Fragaria Ananassa Duch) CV. Rubygem

This experiment was conducted inside the plastic house of the Agricultural Research and Experiments Station in the Al-Sayada area of the College of Agriculture - University of Kirkuk/Iraq, during the growing season of 2020-2021, To study the effect of spraying with calcium and boron with four concentrations (0, 100 Calcium, 20 Boron and 100 Calcium + 20 Boron)mg.L-1 and growth regulatorbenzyl adeninewith three concentrations (0, 30, 60)mg.L-1on some quantitative and qualitative characteristics of the yield of strawberry plant Rubygem variety.The experiment was carried out in accordance with Randomized Complete Block Design (RCBD) for simple factorial tests with three replicates and one tree per experimental unit. The results were statistically analyzed using the ready-made (SAS V 9.0) program. The averages were compared according to Duncan’s Multiple Range Test at probability level (0.05).The results obtained can be summarized when spraying with a combination of calcium 100 mg.L-1 and boron 20 mg.L-1 led to a significant increase in the average number of flowersand fruits, set percentage and Average diameter of fruit.Whereas, spraying with calcium alone at a concentration of 100 mg.L-1 resulted in a significant superiority in the characteristics (average length and size of the fruit, average fruit weight, average yield per plant and yield per unit area).Whereas, spraying with a concentration of 60 mg.L-1 of growth regulator benzyl adenine led to a significant superiority in all the studied traits compared with the rest of the other treatments.The bilateral overlap between the levels of the factors included in the study had a clear significant effect in compared to the comparative treatment.

Response of Cherry Tomato to Foliar Spray of Amino Acid, Bio-Catalyst and Dotted Type in Qualities and Evaluation of Drip Irrigation System

The experiment was conducted in the winter season of 2020 at the Agricultural Research and Experimentation Station of the Faculty of Agriculture, the University of Kirkuk under non-warm plastic house conditions and the study included three factors, the first factor, the type of dotted in the main plot (GR, Turbo, Spiral) and the second factor spraying with determination arginine subplot of concentrations. 300 mg/L and the third factor spraying with Bio-Catalyst Hortiboots10Sub subplot with concentrations (0,5, 10) ml/l and interaction between them in the specific qualities of the cherry Lycopersicon esculentum. L And evaluates the drip irrigation system carried out the working experiment according to the design of the full random sectors R.C.B.D and by arranging the system of dissident splinter panels Split Split Plot and four replication.The results show The amino acid arginine at a concentration of 300 mg/L was significantly superior to the content of lycopene and vitamin C in the fruits and the number of fruits amounted to 29.28 mg/100g, 17.22 mg/100gm, 76.84 fruits/plant compared to control, which amounted to 22.65 mg/100gm, 12.39mg/100gm, 65.18 fruits/plant As for the effect of spraying with humic acid, we notice that 10 ml/liter of humic acid has the highest percentage in the content of vitamin C in fruits, and the number of fruits reached 17.40 mg/100 g and 74.80 fruits/plant and for the effect of the emitter type, the Spiral was superior to the vitamin C content of fruits, which amounted to 21.00 mg/100 g, while the superiority of the emitter GR in the number of fruits was 85.97 fruits/plant.

Role of Nano-Biostimulant and Some Micro-Elements in The Enzymatic and Chemical Content of Common Bean (Phaseolus Vulgaris L.) Grown Under Unheated Plastic House

A field experiment was conducted in a greenhouse north of Babylon City, during the Autumn season 2019-2020, to study the effect of two factors, the first nano-stimulator application, and the second-factor spraying micronutrients (Zn, B, Mo) on the growth and yield of common bean (Phaseolus vulgsris L). A factorial experiment was carried out using the split plots system within a randomized complete block design (RCBD), where the micronutrients (Control, Zn, B, Mo, Zn+B, Zn+Mo, B+Mo, Zn+B+Mo) were distributed in the main plots, while the nano- stimulator (sprayed with concentration 0.75 ml L-1 water) was distributed on the sub-plots. The results showed that spraying the nano-stimulator positively affected the chlorophyll, the percentage of dry matter in the leaves, the zinc content of the leaves, and the activity of the Catalase enzyme. Micronutrients were also significantly affected in all the studied indicators.

Influence of Organic Fertilization, Liquorice, and Bread Yeast Extracts Spray in Some Growth and Yield Properties of Cucumbers Under Unheated Plastic House Conditions

A field study was carried out in unheated plastic house A field study was carried out in the unheated greenhouses of the Department of Horticulture and Landscaping at the College of Agriculture, University of Anbar, at longitude 43.31 and latitude 33.42, to evaluate the effect of adding levels of organic manure (poultry manure) to the soil (weight to weight) and foliar application by spraying liquorice and bread yeast extract on cucumber growth and yield. The study included adding poultry manure to the soil at three levels, 2, 3 and 5%, with spraying two concentrations of liquorice, 2.5 and 5 g liter-1, with or without bread yeast extract 1:10, in addition to control treatment (without addition), and the mineral fertilization treatment according to the fertilizer recommendation. The experiment was carried out according to a Randomized Complete Block Design (R.C.B.D) with three replications, and the treatments means were compared using Least Significant Difference Test (L.S.D) at the probability level of 0.05. The results showed that: organic fertilization of poultry manure 2% + liquorice extract 5 g. L-1 recorded a highest leaf area 1435.9 dcm2, and highest plant height (190.0 cm). While the use of poultry manure 3% + liquorice extract 5 g. Liter -1 gave the highest relative content of chlorophyll in leaves (84.47 Spad), whereas the control treatment gave the highest percentage of dry matter in the plant (12.54%). The treatment of poultry manure 2% + liquorice extract 2.5 g. Liter -1 gave the largest number of fruits (14.5 fruits plant-1), the highest yield per plant (1.228 kg. plant-1, the highest total yield of 1.228 tons Plastic house-1, and the lowest nitrates concentration in fruits (9.541 mg kg-1). whereas the treatment of poultry manure 2% + liquorice extract 2.5 g. 1 liter-+ bread yeast extract 10:1. gave the highest fruit weight of 88.76 g. The treatment of poultry manure 5% + liquorice extract 2.5 g. Liter -1 achieved the highest nitrogen concentration of 1.758%, and the highest potassium concentration of 6.200% in the fruits. While the treatment of poultry manure 5% + liquorice extract 2.5 g. Liter -1 + bread yeast extract 10:1 gave the highest phosphorous percentage of 0.850% in fruits.

Effect Of Granule And Liquid Biofertilizers On Growth And Yield Of Maize Under Several Levels Of Drought Stress

The study conducted at the Integrated Laboratory of the Faculty of Agriculture and Animal Husbandry, University of Muhammadiyah Malang, aimed to formulate granule and liquid biofertilizers for corn cultivation on dry land in Indonesia, covering 144.47 million hectares. Corn is a crucial agricultural commodity in the country, aligning with the Sustainable Food Self-Sufficiency Policy program. Fertilizers, especially biological ones with plant growth-promoting rhizobacteria (PGPR), play a pivotal role in enhancing both the quality and quantity of corn production. The research utilized a Nested Split Plot Design, considering varying levels of drought stress (100%, 70%, and 40% of field capacity) and bacterial density (control, 10^9, 10^8, and 10^7). Results indicated no significant interaction between granular and liquid fertilizer densities across different field capacities. While the PGPR consortium in both fertilizer types showed limited effectiveness in boosting maize growth and yield, the highest average performance was observed at a density of 10^7. Additionally, certain stress levels did not contribute to increased maize growth and yield, except for the 100% field capacity treatment. It was noted that extreme temperatures, reaching up to 54°C in the plastic house, might have hindered the expected interaction. Plant growth tends to decrease drastically below 15°C or above 40°C, as these temperatures activate physical and chemical processes in plants. The study underscores the importance of considering environmental factors in optimizing biofertilizer effectiveness for sustainable corn cultivation on Indonesian dry land.

Tuta absoluta; A Devastating Pest of Tomato: A Review

Tomato (Solanum lycopersicum L.) is a very important vegetable crop of the world. However, there is a huge loss in tomato production due to pest and disease incidence. Tomato leaf miner is a devastating pest of tomato and other Solanaceous crops in many vegetable crop growing areas around the world and it also attacks non-solanaceous crops. The larva is the most devastating stage of tomato leaf miner. After egg hatching, the larvae feed on tomato fruits, leaves, flower buds, and young shoots and create mines and galleries. Larval feeding may reduce tomato production by 80-100 % in an open field as well as in a plastic house if no control measures are carried out. Chemical control has been found ineffective due to a wide host range and has developed resistance to dozens of pesticides. Hence, Integrated Pest Management (IPM) practices involving mass trapping of the pest using pheromone trap, biological control by a predator, parasitoid, entomopathogenic microbes, including cultural practices should be implemented for the effective control of this pest.

Evaluation of Cucumber Hybrids for Yield and Quality Under Plastic House and Open Field Conditions

Low yield of off-season cucumber due to use of open-pollinated varieties with high male to female ration, long gestation period and high incidence of diseases are the major problems of cucumber production in Nepal. The use of imported hybrids varieties during the off-season and plastic film technology has shown to lead to enhanced growth and higher yield in recent years. However, there is a little work on hybrid cucumber research and their testing in Nepal. Therefore, experiments were conducted at the National Horticulture Research Center (NHRC), Directorate of Agricultural Research (DoAR), Tarahara and Farmer's field in Dhankuta district accordingly to select best hybrids. Sixteen genotypes including best Indian hybrid Dynasty and 3 open-pollinated check genotypes were evaluated at NHRC, Khumaltar during the years 2018 and 2019 in Randomized Complete Block Design (RCBD) with three replications under the plastic house. Previously selected seven genotypes were evaluated in DoAR, Tarahara in 3 replications and best hybrid was compared with farmers' varieties in Dhankuta at open field conditions. Tested genotypes showed a significant difference in yield and other parameters like male to female ratio, early flowering, vine length, disease scoring etc. both under the plastic house and open field conditions. The new hybrids HRD CUM 009 x 003 (107.05 mt/ha), HRD CUM 006 x 003 (91.55 mt/ha) and HRD CUM 004 x 001(88. 10 mt/ha) were promising due to higher yield, earlier to 50% female and male flowering, a greater number of female flowers, short vine length, higher number of fruits per plants and earliness harvesting than other cultivated varieties. Most of the tested hybrids produced more than double yield than open-pollinated genotypes.

Cucumber(Cucumis SativusL.)Growth and Nutrient ContentResponse to Applications of Leonarditeand Phosphorus Fertilizer

Leonardite is a common mineral that contains a lot of organic matter. It may have a beneficial influence on plant growth and nutritional content. The objective of the present study was to determine the effect of four different leonardite doses (0, 20, 35, and 50 g kg-1), three different phosphor rates (0, 50, 100, and 150 mg kg-1P), on plant growth, and nutrient uptake of Cucumber (Cucumis sativusL.). plants. The experiment was conducted in a plastic house. Increasing the leonardite dose statistically increased the concentrations of N, P, K, Mg, Cu, and Mn in the cucumber leaves, but Zn content (34.711 a) mg kg-1of the leaves was significantly higher only with the (20 gm) of leonardite. The highest phosphor application (150 mg kg-1) increased leaf N, P, K, Ca, Mg, and Mn concentrations compared with the other three doses and also the leaf Zn levels statistically did not increase as the P applications increased from (control to 150 mg kg-1). Based on the number of fruits per plant, the best interaction among leonardite doses and phosphor rate were a combination of the (35gm×100 mg kg-1) increasing the numbers of cucumber per plant (48.000a).

Uji Efektivitas Campuran Herbisida Berbahan Aktif Atrazin dan Topramezon terhadap Beberapa Jenis Gulma

The purpose of this study was to determine the effectiveness of mixing herbicides with the active ingredients atrazine and topramezone in controlling weeds and to determine the nature of the mixture of the two active ingredients. This research was conducted in a plastic house in Natar District, South Lampung Regency from October 2020 - January 2021. The study was arranged in a Completely Randomized Design (CRD). The treatments consisted of three types of herbicides with six dosage levels of the active ingredients, namely the single herbicide Atrazine 300 g/l (0, 37.5, 75, 150, 300, and 600 g ai ha-1), Topramezon 10 g/l (0. 1.25 , 2.5, 5, 10, and 20 g ai ha-1), and the herbicide mixture of Atrazine 300 g/l + Topramezone 10 g/l (0. 38.75, 77.50, 155, 310, and 620 g ai ha-1) , and repeated 6 times. The target weeds included broadleaf weeds (Ageratum conyzoides and Synedrella nodiflora), grass groups (Digitaria ciliaris, Echinochloa colonum, and Eleusine indica), and the puzzle group (Cyperus iria). The herbicides atrazine and topramezone have different ways of working so that the analytical method used is the Multiplicative Survival Model (MSM) method. The results showed that mixing the herbicide Atrazine 300 g/l + Topramezon 10 g/l had an expected LD50 value of 46.28 g ai ha-1 and a treatment LD50 of 27.22 g ai ha-1 with a co-toxicity value of 1.7 (Co-toxicity &gt; 1) so that it is synergistic.Key words: Atrazin, Topramezon, mixing herbicide, Multiplicative Survival Model, weed, LD50

Drought stress and K effects on contents of soil water and organic matter, CEC, exchangeable-K, yield and water productivity of sweet corn on Inceptisols

The research was conducted to study the effects of drought stress and K fertilizer on plant growth, contents of soil water (SWC) and organic matter (SOM), cation exchange capacity (CEC), K-exchange, yield and water productivity of sweet corn (Zea mays saccharata Sturt.) grown in Inceptisols. The research was conducted on a plastic house in a controlled culture experiment field, Faculty of Agriculture, Universitas Padjadjaran using a factorial randomized block design (RBD). The first factor was the four percentages of drought stress (0%, 20%, 40% and 60%). The second factor was three levels of KCl dose (1, 1.25 and 1.50 times the recommended dose of 50 kg ha−1 KCl). The treatment combinations were repeated three times. The interaction between 20-40% drought stress and 1.50 times dose of KCl had a significant effect on stem diameter and independently this KCl dose affected the leaf numbers, but without drought stress. The treatment without drought stress resulted in highest plant height and leaf area index, while drought stress of 40-60% gave higher SOM and CEC, even in 60% drought stress showed a higher exchangeable K. The application of 1.25 times dose of KCl caused higher K-uptake, while the treatment of 40% drought stress gave higher water productivity.