Shoot Pruning Research Articles

Pengaruh Penyemprotan Monokalium Fosfat dan Pemangkasan Pucuk terhadap Pertumbuhan dan Hasil Produksi Tanaman Cabai Rawit (Capsicum frustescens L.) pada Hidroponik Sistem Dutch Bucket

Cayenne pepper plant (Capsicum frustences L.) is a plant that is synonymous with its spicy taste, so consumption needs are increasing. However, production of cayenne pepper plants has decreased due to a decrease in land conversion and climate influences. Application of hydroponic dutch bucket system and monopotassium phosphate (MKP) spraying as well as shoot pruning techniques at certain times to increase production. This research aims to determine the effect of MKP spraying and shoot pruning on the growth and production of cayenne pepper plants using the dutch bucket hydroponic system. The experimental design used two factorsthree test. The first factor is variation in concentration of MKP administration, with 3 levels. The second factor is the pruning time with 3 levels so that there are 27 experimental units. The data is then analyzed and evaluated using analysis of Variance (ANOVA). Each observed variable is analyzed separately and significant differences between average values are based on tests Duncan Multiple Range Test (DMRT) with a confidence level of 95%. The results show for the stem diameter variable, the monopotassium phosphate spraying treatment gave very significantly different results and shoot pruning gave significantly different results.The combination of monopotassium phosphate spraying treatment with a dose of 4 g/liter and a shoot pruning time of 21 days after planting (M3N2) gave the highest results for the variables of stem diameter, number of flowers to fruit, number of fruit, and fruit weight.

НАГРУЗКА КУСТОВ БЕССЕМЯННЫХ СОРТОВ ВИНОГРАДА ПОБЕГАМИ И ГРОЗДЯМИ: ОБЗОР

The article considers the issue of loading bushes of seedless grape varieties with shoots and bunches in the world practice. The analysis is presented on the timing and length of pruning shoots, the load of bush by shoots, the load of bushes by bunches and methods for regulating the compactness of bunches of seedless grape varieties. The timing of pruning regulates the growth strength of shoots and the maturation time of early seedless grape varieties. Experiments on the timing of pruning often combined with subsequent treatment with growth regulators to increase yields. The length of the pruning of shoots affects the condition and death of the buds, the timing of the passage of phenological phases, productivity and quality of seedless varieties. Variety specificity and pruning dependence are noted: some varieties prefer short pruning (Perlett in India, White Seedless and Red Seedless in Iran), some – long (Beauty Seedless in India, Kishmish Batir in Uzbekistan, etc.). With an increase in the number of shoots per bush, yield capacity increase, however, the quality of grapes decreases, which also happens when the load of bunches increases. For the Jumba Seedless variety, despite the high performance with a low load of bushes with bunches, a higher one is recommended for an optimal ratio of productivity and quality. Thinning of bunches is also a common technique for regulating yield and quality, however, it is necessary to take into account the timing of thinning – too early removal of part of the inflorescences can lead to the formation of an excessively loose bunch, as in the BRS Vitoria variety in Brazil. Studies of the load of bushes of seedless grape varieties with shoots and bunches are relevant, especially in view of modern climate changes and increasing demand for high-quality products. Such studies are few in number in Russia, which requires closer study for the development of table seedless viticulture.

Effect of shoot pruning and growth regulators on yield, quality and marketability of kiwifruit (Actinidia deliciosa) Cv. Allison

Effect of shoot pruning and growth regulators on yield, quality and marketability of kiwifruit (Actinidia deliciosa) Cv. Allison

EFFECTIVENESS PRUNING AND PLANTING MEDIA ON THE MORPHOLOGY AND RESULTS OF FLOATING RED CHILIES

Horticultural commodities hold significant economic potential in Indonesia, particularly red chilies, which serve various purposes such as a spicy,traditional spicy, and industrial raw material. This research aims to assess the impact of shoot pruning and planting media composition on the morphology and yield of red chili plants. The study employed a Randomized Factorial Group Desugn (RAKF) with two main treatments : shoot pruning and planting medium composition. Results indicate that pruning shoots at 35 days after planting (P4) enhances the cultivation of red chili plants, as evidenced by improved plant height, earlier flowering, and increased root length. Furthermore, a planting medium composed of soil, cow dung compost, and 2:1:1 husk charcoal (M4) proves to be more beneficial for red chili yield, demonstrated by higher plant height, stem diameter, and root length.

Effect of shoot pruning and chicken manure on fruit set and yield of cayenne pepper grown on a sandy dryland soil

Improving the soil properties of a sandy dryland and carbohydrate allocation in crops grown on it is vital for crop production. This study explores the potential benefits of applying chicken manure and shoots pruning on fruit sets and the yield of cayenne pepper (Capsicum frutescens L.) grown on sandy dryland soil. An experiment testing a hybrid variety of cayenne pepper (Dewata 43) was conducted in Gumantar village, North Lombok, Indonesia (8.253654 S, 116.285695 E). Chicken manure treatment consisted of three levels; no chicken manure, chicken manure, and Trichoderma-enriched chicken manure at 3.5 ton ha−1. Pruning consisted of two levels; unpruned and pruned at three weeks after planting. The treatments were arranged factorially in a randomized block design with three replications. The study revealed that the soil was low in organic matter and had low nutrient content. Pruning did not show a significant effect, but chicken manure affected the fruit set and yield of cayenne pepper. Trichoderma-enriched chicken manure produced the highest fruit set (93%) and fruit weight per plant (286 g). The highest yield up to the fifth harvest was much lower than the variety’s yield potential, indicating room for improvement in cayenne pepper production in sandy dryland soils.

Comparation of two pruning methods toward arabica coffee seedling growth

Coffee production success in Indonesia was strongly affected by culture technique, for instance, proper pruning. Pruning Arabica coffee seedling is one of techniques to boost productivity by cutting the plant shoots and stems. This study aims to determine the effectiveness of shoot pruning and 50% pruning on the growth of Arabica coffee seedlings. Data processing was carried out by statistical methods to compare or test the average data of two paired populations using the T test at a level of 0.05. Parameters observed were plant height, number of leaves, stem diameter and number of branches. The results of the arabica coffee seedling experiment with two treatments of pruning on the shoots pruning showed that the average plant height, number of leaves, and number of branches, was higher than pruning at the 50% pruning. Meanwhile, pruning 50% of stem diameter showed a higher average than pruning of shoots. It can be concluded that pruning of Arabica coffee seedlings, especially shoot pruning, has a better effect on the growth of arabica coffee seedlings.

Growth, Yield and Fatty Acid Profile of Winged Bean (Psophocarpus tetragonolobus) Seeds with Shoot Pruning and Additional Fertilizer

Winged bean is a remarkable climbing plant, distinguished by its multiple segments that serve as growth sites for shoot, leaf and flower. Several studies have shown that the plant requires shoot pruning to increase the production of its flower buds, pods and seeds, but this practice can inhibit the generative phase. To overcome this challenge, the application of additional fertilizer is needed to provide the required nutrients. Therefore, this study aims to determine the effects of shoot pruning and additional fertilizer on the growth, yield and bioactive compounds of winged bean seeds. The determination of the proper rates of fertilization was important for plant production and to support sustainable agriculture. The study procedures were carried out at IPB experimental station in Leuwikopo, IPB University, Bogor. A Randomized complete block design (RCBD) was utilized with two factors and three replications, namely leaf pruning (without shoot pruning, 15 cm, and 30 cm from the ground) and additional fertilizer (0, 6.25, 12.5 and 18.5 g NPK 16-16-16 plant<sup>-1</sup>). The parameters observed included plant height, leaf nutrient, root length, yield, leaf number, as well as protein and fatty acid profile of seeds. The results showed that shoot pruning treatment and additional fertilizer had no interaction effect on plant growth and seed yield. Shoot pruning caused an increase in leaf number, fatty acid and linoleic acid content by 17% to 20%, 10%, and 16% to 19%, respectively, compared to the control. The use of additional fertilizer at a concentration of 6.25 to 12.5 g NPK (16-16-16) plant<sup>-1</sup> increased leaf number, nutrients, and seed yield. Based on the findings, the highest seed yield (2.56 tons ha<sup>-1</sup>) was achieved with the application of additional fertilizer at the rates of 6.25 g NPK (16-16-16) plant<sup>-1</sup>, but shoot pruning was not required.

PEMBERIAN KONSENTRASI MOL RESALITA DAN PEMANGKASAN PUCUK TERHADAP PERTUMBUHAN DAN HASIL TANAMAN MENTIMUN

Cucumber (Cucumber SativusL) is one of the types of fruit vegetable plants of the gourd family (Cucurbitaceace) originates from the continent of Asia, and is used as raw material for the beauty industry. The research was carried out from March to June 2023. and Taba Mulan Village, District/Kepahiang. This study used the Complete Randomized Block Design (RAKL) method. The first factor was the MOL concentration consisting of 5 levels. The second factor was pruning days which consisted of 5 levels and was repeated 3 times and 5 plant samples so that there were 75 pages. Giving Mol concentration and shoot pruning affected the growth and yield of cucumber plants 100 ml/water and 25 hst. In the M2P2 treatment, the fastest number of flowering ages was 85.1 days. M2P2 (50 ml/liter of water and 14 hst) had the longest fruit length, namely 61.28 cm and the M4P4 treatment (100 ml/liter of water and 25 hst) had the highest number of fruit, namely 5.4 fruit, and a small amount, namely 4.2 fruit.
 
 Keywords :Yield, Cucumber, MOL, Growth

Assessment of vineyard vigour and yield spatio-temporal variability based on UAV high resolution multispectral images

Accurate, timely assessment of the vineyard on a field scale is essential for successful grape yield and quality. Remote sensing can be an effective and useful monitoring tool, as data from sensors on board Unmanned Aerial Vehicles (UAV) can measure vegetative and reproductive growth and thus directly or indirectly detect variability. Through the images obtained from UAV, the Vegetation Indices (VIs) can be calculated and compared with various agronomic characteristics of the vineyard. The objective of this study was to evaluate the multispectral response of the vineyard in three specific phenological phases and to analyse the spatial distribution of vegetative vigour. A multirotor UAV equipped with a camera featuring multispectral sensors was used. Four VIs namely Normalised Difference Vegetation Index (NDVI), Normalised Difference Red Edge (NDRE), Green Normalised Difference Vegetation Index (GNDVI), Modified Soil Adjusted Vegetation Index (MSAVI), were calculated using the georeferenced orthomosaic UAV images. Computer vision techniques were used to segment these orthoimages to extract only the vegetation canopy pixels. High level of agronomic variability within the vineyard was identified. Pearson's coefficient showed a significant correlation between NDVI and NDRE indices and yield since early phenological stages (r = 0.80 and 0.72 respectively), GNDVI at grape ripening (r = 0.83). Shoot pruning weight (SPW) shows the highest values of correlation (r = 0.84) with NDVI during the phenological stage of berries pea size. Simple linear regression techniques were evaluated using VIs as predictors of the SPW, and accurate predictive results were obtained for NDVI and NDRE with RMSE values of 0.18 and 0.24, respectively. Geostatistical analysis was applied to model the spatial variability of SPW, and thus vineyard vigour. Assessing spatial variability and appreciating the level of vigour enables improved vineyard management by increasing sustainability and production efficiency.

Pruning and additional fertilizer applications affect morphophysiological characters and flavonoid content of winged bean

Excessive leaf production in winged bean may delay the flowering time and reduces the yield, therefore, shoot pruning and additional fertilizer were applied in order to improve yield. The research was carried out at Leuwikopo Experimental Station, IPB University, Bogor from January to July 2022. The study used a randomized complete block design with 2 factors and three replications. The first factor was three types of shoot pruning, namely without shoot pruning, shoot pruning at 15, and 30 cm height. Pruning was conducted at 7 weeks after transplanting (WAT). The second factor was four doses of fertilizers (0, 6.25, 12.5, and 18.75 g of NPK (16-16-16) per plant). The additional fertilizer was given every two weeks from 7 until 15 WAT. The variables observed were the morphophysiological characters, shoot auxin levels, plant nutrient levels, pod yield, pod number, and pod flavonoid content. The results showed that plant’s biomass increased with additional fertilizer, lower relative growth rate and higher auxin content was from 15 cm pruning. The interaction of two factors affected flowering time and flavonoid content. Shoot pruning and 6.25 g NPK delayed flowering by 0.7-1 day. The highest flavonoid content was found in the plant without pruning and additional fertilizer. Plant yields were not significantly affected by treatments.
 Keywords: auxin; flavonoid content; flowering time; leaf nutrient; young pods

EFFECT OF SHOOT PRUNING INTERVAL AND DOSAGE OF POTASSIUM FERTILIZER ON GROWTH AND YIELD OF YAM BEAN (PACHYRHIZUS EROSUS L.)

A study was conducted in Baratan village, district of Patrang, Jember, East Java, on the effects of shoot pruning intervals and potassium fertilizer dosages on the growth and yield of yam bean (Pachyrhizus erosus L.). Pruning of the plant shoot was done six weeks after planting, 50 cm above the soil surface. Three levels of shoot pruning treatment were: no pruning (control), shoot pruning every 7 days, and shoot pruning every 14 days. The dosages of potassium fertilizer were: 0, 75, 150, 225, and 300 kg ha1 of K2O. The experimental design adopted was the completely randomized block design (CRBD) with three replications. The results showed that pruning of shoots every 7 days with potassium fertilizer at 225 kg ha-1 gave the best effect on leaf area index, tuber diameter, tuber fresh weight, tuber dry weight, and total plant fresh weight and dry weight, respectively. Those values were 6.1; 18.88 cm; 468.56 g, 89.05 g, 710.32 g, and 143.54 g, respectively. There was an increase of 289, 175, 392, 362, 247, and 223 percent again without pruning and potassium fertilizer (control) treatments. Pruning shoots every 7 days with 300 kg ha-1 potassium fertilizer resulted in the highest tuber carbohydrate content, which was 44.99 percent higher than the control treatment (no pruning and potassium fertilizer application).

Influence of late pruning practice on two red skin grapevine cultivars in a semi-desert climate.

Continually increasing global temperature could severely affect grape berry metabolite accumulation and ultimately wine polyphenol concentration and color intensity. To explore the effect of late shoot pruning on grape berry and wine metabolite composition, field trials were carried out on Vitis vinifera cv. Malbec and cv. Syrah grafted on 110 Richter rootstock. Fifty-one metabolites were detected and unequivocally annotated employing UPLC-MS based metabolite profiling. Integrating the data using hierarchical clustering showed a significant effect of late pruning treatments on must and wine metabolites. Syrah metabolite profiles were characterized by a general trend of higher metabolite content in the late shoot pruning treatments, while Malbec profiles did not show a consistent trend. In summary, late shoot pruning exerts a significant effect, though varietal specific, on must and wine quality-related metabolites, possibly related to enhanced photosynthetic efficiency, which should be taken into consideration when planning mitigating strategies in warm climates.

Under-vine vegetation in vineyards: a case study considering soil hydrolytic enzyme activity, yield and grape quality in Austria

In vineyards, the under-vine area is managed to control vegetation growth and to reduce the competing effect of growing plants on vines and fruit development. Applied under-vine management methods are the application of herbicides, soil tillage or the growth of spontaneous vegetation or cover crops. These methods affect pedo-climatic conditions differentially as well as the soil biota and have, therefore, consequences on soil functions and ecosystem services. In the presented case study, the effects of five under-vine management methods on the activity of soil hydrolytic enzymes, the soil water content, vine photosynthetic activity, shoot pruning weight, grape yield and quality are investigated in a vineyard in Lower Austria over three consecutive seasons. Thereby, we hypothesise that a permanent under-vine vegetation cover, either mowed or without mowing, supports the soil microbial communities and soil functions in a way to enhance water and nutrients availability for vines which partly compensates for the competition of the growing vegetation. Our results confirm effects on the soil water balance, more specifically, a reduced soil water content in 11 -20 cm soil depths induced by a permanent vegetation cover as compared to herbicide application or soil tillage. Further consequences of permanent vegetation below vines were lower shoot pruning weights and lower berry weights, while total soluble solids and titratable acidity were not affected. The vine's photosynthetic activity, as well as the soil water content, were partly affected by treatments dependent on the precipitation ahead of the measurement. In parallel, the soil microbial activity was significantly enhanced by a permanent vegetation cover below the vines as compared to herbicide application, a trend which increased with the years of the project. In conclusion, permanent under-vine vegetation strongly promoted soil microbial activity without strong effects on shoot pruning weight, grape yield and quality. In the next step, a functional proof is necessary to characterise the interaction between soil microbial activity, soil water balance and vine nutrition and water status by using sensors for continuous measurements.

Aplikasi Pupuk Daun dan Pemangkasan Pucuk Terhadap Produksi dan Mutu Benih Mentimun (Cucumis sativus L), Application Of Foliar Fertilizer and Shoot Pruning On Seed Production and Quality Cucumber (Cucumis sativus L)

Cucumber is an annual plant whose life is creeping or climbing on twisted or spiral handles with a fairly high nutritional content, namely 0.65% protein, 0.1% fat and carbohydrates, 2.2%, calcium, iron, magnesium, phosphorus, vitamin A. , B1, B2 and C. To meet the needs of cucumbers, it can be started by providing quality seeds by optimizing cucumber seed production activities through the application of Gandasil D leaf fertilizer as well as shoot pruning treatment. The purpose of this study was to determine the effect of interaction between gandasil D leaf fertilizer and shoot pruning on the production and quality of cucumber seeds. The research was conducted for 3 months at PT. Wira Agro Nusantara Sejahtera Kediri with a factorial randomized block design (RBD). The first factor is the concentration of gandasil D leaf fertilizer (K) with 3 levels, namely Concentration of 0 grams/liter (K0), Concentration of 2 grams/liter (K1), and Concentration of 4 grams/liter (K2). While the second factor was shoot pruning (P) with 3 levels, without pruning (P0), trimming shoots on the 10th segment (P1), and trimming the shoots on the 20th segment (P2). Data were analyzed by ANOVA followed by Duncan's Multiple Range Test further test at 95% significance level. The results showed that the concentration treatment of Gandasil D leaf fertilizer had a very significant effect on fruit weight, but had no significant effect on other parameters. The shoot pruning treatment had a very significant effect on fruit weight, fruit diameter, seed weight per plant, seed weight per hectare, and weight of 100 grains. Cucumber plants that were trimmed at the 20th segment (K2) showed the highest values, namely 5.29 cm for fruit diameter, 12.66 grams for seed weight per plant, 334,83 kgs for seed production per hectart, and 2.23 grams for weight of 100 grains. The interaction of the two treatments only affected fruit weight, where cucumber plants fertilized with Gandasil leaves with a concentration of 4 grams/l (K2) and trimmed shoots on the 20th segment (P2) had the highest fruit weight, which was 278.40 grams.

PENGARUH MEDIA TANAM DAN PEMANGKASAN PUCUK TERHADAP PERTUMBUHAN VEGETATIF TAPAK DARA (Catharanthus roseus (L.) G. Don)

This study aimed to determine the effect of planting media and shoot pruning on the vegetative growth of the tapak dara (Catharanthus roseus (L.) G. Don) plant. The research method was factorial completely randomized design (CRD) with a combination of planting media and shoot pruning. The treatments were ultisol soil media (M0), a mixture of husk charcoal in a ratio of 1:1 (M1) and 1:2 (M2) with a pruning frequency of no shoot pruning (P0), 1 time pruning (P2) and 2 shoots pruning (P2), so that 9 treatment combinations were obtained, namely M0P0, M0P1, M0P2, M1P0, M1P1, M1P2, M2P0, M2P1 and M2P2, each treatment consisted of 3 replications so that the all sample of media used in this study was 27 polybags. Parameters observed in this study were vegetative growth including plant height (cm), number of branches, number of leaves (strands). The results showed that the planting medium and shoot pruning had a significant effect on the vegetative growth of the tapak dara (Catharanthus roseus (L) G. Don) plant which included plant height, number of branches and number of leaves, where the best plant height measurement was the M2P0 treatment with height the plant reaches 23.5 cm. The highest number of branches was produced in the M2P2 treatment with an average number of branches, which was 7.3. The highest number of leaves was in the M1P1 treatment with the number of leaves reaching 40 strands.

Effect of Shoot Pruning on Growth, Flowering and Fruiting Characteristics of Different Guava (Psidium Guajava L.) Cultivars

ABSTRACT A field trial was conducted to study the effect of shoot pruning on growth, flowering and fruiting characteristics of different guava cultivars. The experiment was carried out during Jan. 2018 to June 2019. The experiment was laid out in Randomized Block Design (RBD) with seven cultivars as treatments including L-49 (T1), Allahabad Safeda (T2), Baruipur (T3), Doodh Khaja (T4), Kafri (T5), Bhagalpur (T6) and Harichal (T7). Shoot pruning in guava is an alternative practice used to control the excessive growth and vigor of the plant. The plants were pruned from 120 cm above the ground level as heading back to facilitate the production of new shoots from below the cut point and allow the primary shoots. These results revealed that, guava cultivar baruipur was best in terms of number of primary shoots (58.17), length of primary shoots (135.82 cm) at 12 months after pruning, flowering percentage (66.11%) and better fruit characteristics.

A Review on Crop Regulation Techniques in Guava (Psidium guajava L.) through Hi-Tech Practices

Guava (Psidum guajava L.) is one of the most favorable fruit crops in India and is considered to be a well-executed, nutritionally valuable and profitable crop. Recently, guava has secured higher demand within the global trade because of its nutritional value and processed products. It is a hardy, prolific bearer and produces a fairly remunerative fruit crop. It is mainly cultivated on a large commercial scale. Guava fruit bears three bahar seasons, viz., Ambe bahar, Mrig bahar, and Hasth bahar. The continual bearing habit ends up in the reduction of yield with the inferiority of small-sized fruits. So as to overcome this problem, bahar treatment is practiced. Among the three bahar seasons, the heaviest flowering is observed in the Ambe Bahar season, but the fruit quality of this season is rough, watery, insipid in taste, poor in quality, less nutritive and is heavily attacked by many insects, pests and diseases. The fruit quality of winter season crops is excellent, nutritive, and escaped from the attack of fruit flies. Therefore, the crop regulation practice is to force the tree for rest and produce profuse blossoms and fruits throughout any one of the two or three flushes. It is necessary to reduce the fruit set during the rainy season and subsequently increase the fruit set during the winter season through the use of various chemicals like NAA, ethereal and urea etc to regulate the guava crop. This method aims at regulating uniform and good quality fruit and also maximizing produce as well as profit. This regulation method depends on climatic factors, cropping pattern, extend of the damage by the disease and pests, market and industry demand, cultivar, etc. Crop regulation is accomplished by the various strategies like water management to induce stress, training and pruning of shoots and roots at different levels as well as at different times and manual or chemical thinning of flowers.

General trends of different inter-row vegetation management affecting vine vigor and grape quality across European vineyards

Cover crops in vineyards do provide many important ecosystem functions, however wine growers are often reluctant to incorporate cover crops into their vineyard management as they are concerned about competition regarding water and nutrient availability. The objective of this study was to define the effects of three standard inter-row vegetation management strategies on vine growth and grape quality in different European regions. We hypothesize that general patterns of responses to different inter-row management can be identified across European vine growing regions independent of local climate and soil conditions. Data were collected in 2016 and 2017 in commercial vineyards located in five European temperate wine growing regions directly comparing standard inter-row vegetation management strategies in parallel in vineyards ranging from cover crops to bare ground through tillage or herbicide application. Vegetation management strongly influenced leaf chlorophyll content, shoot pruning weight and yeast assimilable nitrogen (YAN) in grape juice. Across countries, grape varieties and varying soil conditions, YAN consistently showed higher values in grapes separated by bare ground inter-rows as compared to inter-rows with a permanent vegetation cover. Other grape quality parameters, total soluble solids, total titratable acidity and berry weight were not or inconsistently affected across countries, preventing the prediction of generalized trends. We also observed higher values of soil organic matter in complete vegetation inter-rows. In conclusion, we identified general effects of inter-row vegetation management on vine vigor and grape quality across countries and grape varieties in different pedo-climatic conditions. Our study provides general response patterns as a basis for functional studies to develop local inter-row vegetation management strategies.

Forever Young? Late Shoot Pruning Affects Phenological Development, Physiology, Yield and Wine Quality of Vitis vinifera cv. Malbec

‘Malbec’ grapevines commonly have high yield, thus intermittently negatively affecting wine quality parameters. Here, we describe the use of late shoot pruning (LSP) practice applied for wine quality improvement. We examined the effect of timing of LSP on ‘Malbec’ vines grown in Mediterranean conditions during three consecutive seasons (2016–2018) in Israel. The timing of LSP treatment applications (applied one, two and three weeks after bud break) were compared with cluster-thinned, winter-pruned vines (WP + T) and standard winter pruning (WP). The LSP practice postponed bud break of target buds but did not have a temporal effect on the onset of veraison. Midday stem water potential was less negative and stomatal conductance and net CO2 assimilation rate were higher in the LSP vines. This practice led to a substantial reduction in the number of clusters and crop yield. Finally, wine quality was positively affected by applying LSP treatment. Performing the inexpensive LSP treatment at the precise timing after bud burst was found to save labor, decrease crop yield and improve grape and wine parameters. LSP application should be considered in adequate varieties as a significant tool for the enhanced effectiveness of vine growing in warm regions.

Response of Shoot Pruning on Growth, Flowering and Fruiting Characteristics of Guava under Sub-Himalayan Terai Region of West Bengal

Guava is one of the important fruit crops grown worldwide. Shoot pruning improves the emergence of new flush and its role on flowering and fruiting characteristics was evaluated on this experiment. The effect on shoot pruning height and removal of top leaf bud by pinching was assessed on growth, flowering and fruiting characteristics of guava cv. L-49. The experiment was conducted at Uttar Banga Krishi Viswavidyalaya There were two factors heading back and pinching. Heading back at the level of, Pundibari, Cooch Behar, West Bengal. 90, 120 and 150cm was done in January and pinching of one leaf pair was performed during the last week of June, 2018.The heading back at the level of 120 cm and no pinching were most effective for number of flowering bud (179.33), number of flowers (139.83), number of fruit set (95.33), total number of fruits (64.66), ascorbic acid (190.35 mg/100g), titratable acidity (0.28%) and heading back at the level of 120 cm and one pinching were effective in increasing number of primary shoots (39.50), flowering percentage (80.18%), fruit weight (172.00g).