Ciherang Variety Research Articles

Hubungan antara Faktor Karakteristik Petani dengan Tingkat Adopsi Budidaya Padi Varietas Ciherang di Kabupaten Bangkalan

<p><em>The Ciherang variety developed by the Department of Agriculture’s Research Center is useful for </em><em>increasing rice productivity and obtaining varieties that are resistant to pests and diseases. Bangkalan Regency seeks to support agricultural development by introducing the Ciherang variety as a step to increase production and the welfare of farmers in the region. The ability to accept an idea is different for each individual, including farmers. Therefore, this study needs to be conducted to determine the factors of farmer characteristics in the level of adoption of Ciherang rice cultivation in Bangkalan Regency. This study aimed to determine the relationship between farmer characteristic factors and the level of adoption of Ciherang rice cultivation in Bangkalan Regency. This research uses quantitative methods, including field survey techniques and purposive sampling techniques, to determine the research location in Bangkalan Regency. The research sample was taken as many as 60 farmers using proportional random sampling technique. Data analysis in this study used the Spearman rank correlation test. The results showed that internal and external factors of farmer characteristics in the form of age, education level, farming experience, land tenure status, and information sources have a significant correlation to the level of adoption of Ciherang rice cultivation in Bangkalan Regency. In contrast, farm size and extension worker intensity do not have a significant correlation with the level of adoption of Ciherang rice cultivation in Bangkalan Regency.</em><em></em></p>

The role of Azolla microphylla green fertilizer and N fertilizer application on growth and production of lowland rice (Oryza sativa L.) Ciherang variety for sustainable agriculture

Abstract One effort to maximize Nitrogen nutrient absorption can be done by combining inorganic N fertilizer with Azolla microphylla as green fertilizer. This research aims to identify the effect of applying A. microphylla green fertilizer and N fertilizer on the growth and production of lowland rice variety of Ciherang. The research was done in a greenhouse of Faculty of Agriculture, Universitas Sumatera Utara from November 2023 to February 2024, using a non-factorial Randomized Block Design, namely 100% Azolla; 25% N + 50% Azolla; 25% N + 100% A. microphylla; 50% N + 50% A. microphylla; 50% N + 100% A. microphylla; 75% N + 50% A. microphylla; 75% N + 100% A. microphylla; and 100% N. The research results showed that application of 100% N fertilizer was able to increase plant height by 6-9 week after transplanting (WAT) and the weight of 1000 rice grains. The combination of giving 75% N and 50% A. microphylla tended to increase the weight of unfilled grain per plant 18.87% compared to giving 100% N. It is recommended that fresh A. microphylla be buried in the soil so that it decomposes more quickly.

Pertumbuhan dan Produksi Padi (Oryza sativa L) Menggunakan Berbagai Sistem Tanam Pada Varietas Yang Berbeda

Rice is the most important food crop in Indonesia. Indonesian people use rice as a daily staple, because rice contains a source of carbohydrates and energy. The aim of the research is to determine the planting systems, varieties and interactions between planting systems and varieties that provide the highest growth and production in rice plants. This research uses a 2 factor factorial design, the first factor is the planting system (S) which consists of 3 treatments: 20 x 20 cm tile planting system (S1), 25 x 25 cm tile planting system (S2), and legowo planting system 2 :1 (S3), the second factor is Variety (V) which consists of 2 treatments, namely the Ciherang Variety (V1) and the Mekongga Variety (V2). The observation parameters are plant height, number of tillers, number of productive tillers, number of perennial seeds, weight of permalai seeds, weight of 1000 grains, and weight of grain per unit. The research results showed that the Jajar Legowo 2:1 planting system gave the highest average number of tillers, namely 24.8 stems, and the highest number of productive saplings with an average of 18.9 stems. The Ciherang variety has a higher plant height and number of perennial seeds than the Mekongga variety. There is no interaction between planting system and variety.

Performance Test of Vegetative Characteristics of Crossed Rice (Oryza sativa L.) Lines of Ciherang Variety X B11143D Line in Telagasari, Karawang Regency, Indonesia

One way to increase the genetic diversity of Ciherang as the superior variety is to cross Ciherang with the donor B11143D line as a New Plant Type (NPT) rice. This study aimed to obtain Ciherang X B11143D lines with the best vegetative characteristics in the field. The research was conducted in rice fields in Talagasari Village, Telagasari District, Karawang Regency, from May to September 2023. This experiment used a single-factor Randomized Block Design (RBD) with three replications of 22 treatments, consisting of 19 Ciherang X B11143D lines and three comparison varieties. The effect of treatment was studied using analysis of variance. The results showed that the rice lines significantly influenced the vegetative characters of Ciherang X B11143D lines in Telagasari, Karawang Regency. Based on the observed characters, several lines were selected i.e. 124.2.3, 94.3.3, and 20.4.4 lines. Those three lines chosen as backcrossing lines performed similarly compared to Ciherang as recurrent parent and inherited several important traits for rising productivity from the B11143D line as donor parent, namely the length and area of flag leaf, the total number of tillers, and the number of productive tillers, which were significantly higher than Ciherang.

Application of Certified Superior Rice Seed Technology to Increase Organic Rice Production Farmer group in Cipatujah sub-district

Improving the production of organic rice can be achieved by using certified superior seed varieties. The research aimed to test the adaptability of several superior rice varieties in organic farming systems to obtain varieties suitable for rice growth and yield in the Cipatujah District of Tasikmalaya Regency. A single-factor randomized complete block design was used in this study to test 3 superior varieties, namely Ciherang, Inpari 32, and Mekongga varieties. Each treatment was replicated 20 plots, resulting in a total of 60 experimental plots. The analysis results indicated that the soil at the demonstration plot location met land suitability and rice plant growth requirements with S1 (very suitable) criteria based on parameters such as pH, organic carbon content (C-organic), nutrient content of Nitrogen, Phosphor, and Potassium, bulk density, particle density, porosity, and soil texture. The superior variety treatments had a significant impact on plant height growth, although there were no significant differences observed in terms of tiller number, productive tiller number, grain yield per hill, filled grain per hill, grain weight per hill, and 1000-grain weight. The Ciherang variety showed the highest plant growth response and larger yield components compared to Mekongga and Inpari 32. The use of certified seeds in organic rice cultivation practices was proven to yield higher results compared to seeds from previous cultivation practices.

Quality and Quantity of Hydroponic Rice Forage Ciherang and IR64 Varieties at Different Harvest Ages

The purpose of this study is to determine how different harvest ages and varieties affect the quantity and quality of fodder produced by hydroponically cultivated rice plants. The study design was a 2 x 3 factorial, completely randomized design (CRD) experiment with five replications. Tiller count, plant height, plant weight, and graph power were among the characteristics that were observed. The data were analyzed using analysis of variance (ANOVA), and any differences were found using Duncan’s multiple area test. The plant height, number of tillers, plant weight, and dry matter production were all significantly impacted by the harvest age factor, according to the data. The variety factor is significantly influenced by the observation variables. The interaction between the parameters at 60 days of yield after planting (DYAP) has a significant impact on the variables plant height, plant weight, number of tillers, and dry matter production. The IR64 variety outperformed the Ciherang variety, according to the results of the proximate analysis, and the best harvest age in terms of crude protein, crude fiber, and crude fat content was at 40 days after planting, while the best TDN was at 60 DYAP. The IR64 cultivar produced the most biomass at a harvest age of 60 DYAP. In summary, the study’s findings suggest that hydroponically grown paddy forage has great promise in terms of the nutrients it can produce, yet biomass output is still lower than that of cutter grass, while dry matter production is higher than that of fodder.

Effect of Rapid Desiccation with Ethanol Immersion on Viability and Vigor of Some Rice Seeds (Oryza sativa L.)

The availability of quality seeds is important in crop cultivation, so quality seeds must be available when farmers need them. Quality seeds must be able to be stored for a long time. Rapid aging through soaking with 95% ethanol within 5 minutes, can predict the shelf life of seeds. Rice seeds that were treated with rapid soaking were Inpari 45 (V1), Sunggal (V2), Memberamo (V3) and Ciherang (V4) varieties. From the results of the analysis of variance, the observation parameters of Germination Power (DB), Maximum Growth Potential (PTM) and Keserempakan Tumbuh (KST) were significantly different (1%). Of the four varieties, after the seeds were soaked in 95% ethanol for 5 minutes DB, PTM and KST decreased very drastically. The order of varieties based on their seed viability and vigor levels, from high to low, are Inpari 45 (V1), Memberamo (V3) Sunggal (V2) and Ciherang (V4). Inpari 45 (V1) has the highest germination rate (DB) of 39%, while Ciherang (V4) has the lowest germination rate (DB) of 15.67%. These results suggest that the Inpari 45 (V1) variety can be stored longer than the other three varieties. Viability and vigor of seeds are not only controlled by environmental factors but also influenced by genetic factors
 
 napid desiccatio, rice varieties, seed viability and vigor

Willingness to Continue Rice Farmers for Ciherang and Inpari 37 Varieties in South Sulawesi: The Influence of Attitude Attributes of Varieties and Socio-Economic Aspects

High-yielding varieties are technological innovations readily accepted by farmers and proven to increase rice productivity. This study aimed to determine the attitude of farmers toward the attributes of rice varieties and compare their willingness to continue in rice varieties and identify influencing factors. This research was conducted from December 2020 to January 2021 with 101 farmers, selected by purposive sampling, using Ciherang and Inpari 37 varieties in South Sulawesi. Farmers’ attitudes towards the attributes of rice varieties were measured by Fishbein analysis. Proportion analysis was done to determine farmers’ willingness to continue using the Ciherang and Inpari 37 varieties, and binomial logistic analysis was used to estimate the factors that influence it. The results showed that farmers’ attitudes toward the attributes of the Ciherang variety were mainly higher than that of Inpari 37, except for attribute productivity, pest and disease resistance, milled yield quality, and grain selling price. The level of willingness of farmers to continue using Ciherang and Inpari 37 was in the high category with a higher Ciherang value than farmers of Inpari 37. The factors influencing the willingness to continue for both varieties were rice texture, resistance to pests and diseases and the selling price. Other factors variably influenced the willingness of farmers to continue for both varieties.

Ketahanan enam galur padi sawah (Oryza sativa L) terhadap wereng batang coklat (Nilaparvata lugens Stål) asal Patokbeusi, Subang

Dalam pelepasan varietas baru, selain diperlukan informasi mengenai karakter-karakter kualitatif maupun kuantitatif galur, juga perlu diperhatikan keunggulan lainnya, seperti ketahanan terhadap wereng batang cokelat (WBC) (Nilaparvata lugens, Stål) (Hemiptera: Delphacidae). Tujuan penelitian ini adalah untuk mengetahui ketahanan terhadap WBC pada 6 (enam) galur calon varietas yang dikembangkan oleh IPB University, yaitu TCIPB202101, TCIPB202102, TCIPB202103, TCIPB202104, TCIPB202105, dan TCIPB202106. Pengujian ketahanan terhadap WBC dilakukan dengan melakukan uji penapisan dan uji perkembangan populasi. Varietas Inpari 30 dan Ciherang digunakan sebagai kontrol. Hasil penelitian menunjukkan bahwa galur TCIPB202106 merupakan galur yang paling tahan terhadap serangan WBC, sementara yang paling rentan terhadap serangan WBC adalah galur TCIPB202103. Rata-rata jumlah nimfa pada galur TCIPB202106 tiga kali lebih rendah dibandingkan dengan Inpari 30 dan Ciherang. Hasil uji perkembangan populasi sejalan dengan hasil uji penapisan yang menunjukkan bahwa galur TCIPB202106 tergolong dalam kategori agak tahan WBC.

KELAYAKAN USAHATANI PADI SAWAH VARIETAS CILIWUNG DI DUSUN ANTAN DESA ANTAN RAYAN KECAMATAN NGABANG

This research is to determine the feasibility of cultivating lowland rice of the Ciliwung variety in Antan Hamlet, Antan Rayan Village, Ngabang District. The research object is farmers who cultivate the Ciliwung variety of lowland rice in Antan Hamlet during one planting season (MT). The sample used was 38 farmers. From the results of this research, the average variable cost is IDR 2,343,315/MT, the average fixed cost is IDR 178,344/MT. Total cost is IDR 2,605,501/MT. The average farming income is IDR 12,735,789/MT with a rice selling price of IDR 12,000/Kg and the average rice production yield is 1061,315 Kg per farmer. The average income from lowland rice farming of the Ciliwung rice variety in Antan Hamlet, Antan Rayan Village is IDR 10,130,288/MT. If converted for 1 MT, the average income obtained from cultivating Ciliwung variety rice is IDR 1,688,381/month.
 The R/C results concluded that Ciwung variety rice farming in Antan Hamlet, Antan Rayan Village is profitable and feasible to implement because the R/C Ratio value is > 1, namely 4.88 > 1. This conclusion is in accordance with the decision criteria, namely if the R/C Ratio > 1 a farming business will experience a profit (worth trying). The R/C ratio value also shows that every Rp. 1 cost incurred to cultivate the Ciherang variety of rice in Antan Hamlet, Antan Rayan Village will receive a revenue of IDR. 4.88.

Increase in CEC, K-dd, K Uptake, Si-Total, and Rice Yield (Oryza sativa L.) Due to the Application of Organic and Inorganic Fertilizers, Different Doses on Ultisol

The Addition Of N, P, K, Nano-Silica, And Straw Compost Is Useful For Providing The Macro And Micro Nutrients Needed By Paddy Rice Plants. Lowland Rice That Is Commonly Cultivated By Farmers Is The Ciherang Variety. In Lowland Rice Cultivation Activities, It Is Often Found That Plants Are Deficient In Nutrients, Especially In Planting Media That Have A Fairly High Acidity Content, Namely Soils Of The Ultisol Order. This Study Aims To Determine The Optimal Fertilization Of N, P, K, Nano-Silica, And Straw Compost To Increase Cec, K-Dd, K Absorption, Si-Total, And Lowland Rice Yields On Ultisol Soils. This Research Was Conducted From September To December 2022 At The Soil Chemistry And Plant Nutrition Experimental Field, Faculty Of Agriculture, Padjadjaran University, Jatinangor, Sumedang, West Java, At An Altitude Of 723 Meters Above Sea Level. The Experimental Design Was Carried Out Using A Randomized Block Design (Rbd) Consisting Of Ten Treatments And Three Replications. Treatment Consisted Of Control (Without N, P, K, Si And Straw Compost); Straw Compost (5 Tonnes Per Hectare) + ½ N, P, K, Si; Straw Compost (5 Tons Per Hectare) + 1 N, P, K, Si; Straw Compost (5 Tonnes Per Hectare) + 1½ N, P, K, Si; Straw Compost (10 Tons Per Hectare) + ½ N, P, K, Si; Straw Compost (10 Tons Per Hectare) + 1 N, P, K, Si; Straw Compost (10 Tonnes Per Hectare) + 1½ N, P, K, Si; Straw Compost (15 Tonnes Per Hectare) + ½ N, P, K, Si; Straw Compost (15 Tonnes Per Hectare) + 1 N, P, K, Si; Straw Compost (15 Tonnes Per Hectare) + 1½ N, P, K, Si. The Results Showed That The Combination Of Fertilizer Doses Of 1 N, P, K , Nano-Silica And 10 Tons Per Hectare Of Straw Compost Gave The Highest Rice Yield With A Dry Harvested Grain Weight Of 11.00 G.Plant-1.

GENETIC ARCHITECTURE OF NEW PLANT TYPE RICE (ORYZA SATIVA L.) LINES BASED ON A 12-YEARS MULTI-EXPERIMENT

New plant-type (NPT) rice can increase grain yield globally. Although many studies have shown the association between harvest and yield-related traits in rice, it remains obscure in the case of NPT rice. This study aimed to elucidate the relationship between agronomic and yield features in new plant-type rice based on a 12-years multi-experiment. A large dataset of 704 NPT rice lines of various generations (F4 to F10), derived from 24 different populations, underwent study. The analysis of variance showed a highly significant population effect (P < 0.01) on all traits studied. The NPT rice populations had groupings into four clusters, with a highly substantial cluster effect (P < 0.01) on the number of total tillers (NTT), number of total grains (NTG), number of filled grains (NFG), and thousand-grain weight (TGW). Standard best NPT lines from each experiment achieved an average of 1.67 t ha-1 or 26% higher yield than the Ciherang variety. Determining the yield advantage of NPT lines was by higher plant height (PH) (r = 0.37), panicle length (PL) (r = 0.15), NTG (r = 0.28), NFG (r = 0.28), TGW (r = 0.10), and lower days to harvest (DTH) (r = -0.10). The principal component analysis biplot revealed that NFG could better serve as a selection characteristic for enhancing grain yield in developing NPT rice adapted to irrigated tropical ecosystems.

Selection of Intermittent Irrigation to Increase Growth and Yield of Some Local Rice Varieties (Oryza sativa L.) in the Rainy Season

This study aims to examine the influence of various varieties and methods of irrigation on the response to rice growth and yield. The research was conducted in the Experimental Land of the Faculty of Agriculture, University of Muhammadiyah Yogyakarta, in January 2020. The study was conducted in the area using a factorial strip plot design in a Randomized Completely Block Design with three replications. Thirty-six experimental units were obtained. This research consists of two factors. Factor I consists of 4 methods of irrigation, namely continuous flooding, ten days flooding, six dry days, eight days flooding, eight dry days, and six days flooding, ten dry days. Factor II consists of 3 varieties: Ciherang, Cempo Hitam, and Mentik Susu. The observed parameters are the height of plants, number of tillers, leaves area, length of roots, fresh weight of plants, dry weight of plants, harvest index, panicle number, and weight of grain/ hectare. This study showed that Cempo Hitam and Mentik Susu varietas rice plants were higher, and the leaves were more expansive than the Ciherang variety. Irrigation does not affect plant height, number of tillers, leaf area, root length, or rice panicles. There is a mutual influence between variety with irrigation on the fresh and dry weight of rice plants, panicle length, harvest index, and yield per hectare of rice. A variety of Mentik Susu with conventional irrigation, ten days flooded, six days dry, six days flooded, and ten days dry, showed higher yields per hectare compared to the combination of other varieties and irrigations.

Intensitas Serangan Wereng Batang Coklat (Nilaparvata lugens) Pada Beberapa Varietas Tanaman Padi di Kecamatan Kedungadem Kabupaten Bojonegoro

Rice (Oryza sativa L) is a food crop that is used as a staple food source and is an agricultural product that has a strategic and economic role in Indonesia. Bojonegoro is one of the districts that is a food barn in East Java Province. One of the things that can result in decreased rice crop production is the attack of Plant Pest Organisms (OPT). One of the pests that can cause attacks and damage to rice plants is the brown planthopper pest (Nilaparvata lugens). One example of brown planthopper pest attack in Bojonegoro Regency is located in Kedungadem District. The problems that arise due to leafhopper pest attacks on rice plants, need to know the bioecology of planthopper pests and their population density, so as to facilitate proper prevention and control measures, so that the pest population does not cross the economic threshold. This study aims to determine the intensity of attack by the brown planthopper (Nilaparvata lugens) on several varieties of rice plants in Kedungadem District, Bojonegoro Regency. The method used is direct observation every 1 week starting from 1 WAP to 12 MST and counting the brown planthopper pests found in the field. The villages used in the study were Jamberejo Village and Sidomulyo Village with 6 plots of land in each village. In each village, 3 samples of Ciherang variety and 3 fields of Inpari 32 variety were taken. he highest intensity of brown planthopper attacks in Sidomulyo and Jamberejo Villages was in week 7 with attack intensity in Sidomulyo Village of the Ciherang variety, Sidomulyo of the Inpari 32 variety, Jamberejo of the Ciherang variety, and Jamberejo of the Inpari 32 variety respectively were 21%, 17%, 17%, and 13% while the lowest attack intensity was in week 1 with an attack intensity of 0%.

Environmentally friendly bioameliorant to increase soil fertility and rice (Oryza sativa) production

Abstract Soil nutrients can be reduced because of global climate change. This is because climate change causes high rainfall intensity and a prolonged dry season. Efforts to overcome this are fertilized using bioameliorants so that soil nutrients remain available for plants. Observations have been made from May to August 2018 at the JAMTANI Field Laboratory. The study used a factorial randomized block design with three replications. The first factor was a bioameliorant (P1 = goat manure 10 tons ha−1; P2 = goat manure 10 tons ha−1 + Azolla pinnata 10 tons ha−1; P3 = goat manure 10 tons ha−1 + Sesbania rostrata 2 tons ha−1; dan P4 = goat manure 10 tons ha−1 + A. pinnata 5 tons ha−1 + S. rostrata 1 tons ha−1) and the second factor was rice varieties (Ciherang and Mendawak). The application of bioameliorant increased C-organic of soil by 9.04% to 20.41% and soil nitrogen by 11.76% to 38.24%. The addition of bioameliorant did not cause differences in the weight of the plant between the Mendawak variety (61.34 g) and the Ciherang variety (56.96 g). The most efficient addition of bioameliorant is P3 (goat manure 10 tons ha−1 + S. rostrata 2 tons ha−1) with nutrient uptake efficiency value reaching 5.77%. The use of bioameliorant is expected to be able to substitute the use of inorganic fertilizers and increase rice production.

Effectiveness of Long Immersion of Rice Seeds in Local Microorganism Culture (MOL) of Banana Weevils on Rice Growth and Production

The need for rice from year to year continues to increase due to the growing population of Indonesia, but this is not balanced with sufficient rice production. This is what makes it difficult for Indonesia to be self-sufficient in food so that efforts are needed to increase rice production nationally so that domestic rice needs are met. This panel aims to see the effectiveness of long soaking of rice seeds in MOL banana weevil on vegetative growth and yield of Ciherang variety rice plants. The research was conducted in November 2021 – March 2022 on open land of BPP Caringin, Legok District, Tangerang Regency. The study was conducted using the Randomized Complete Group Design (RKLT) method consisting of 5 treatments, namely control (without soaking MOL banana weevil), soaking rice seeds for 6 hours, 12 hours, 18 hours, and soaking for 24 hours. Each treatment was repeated 5 times so that there were 25 experimental units. Each experimental unit consists of three plants, the number of plants to be studied is 75 plants. Soaking seeds in MOL banana weevil for 24 hours gives the best results for the growth and production of Ciherang rice plants.

The Effect of Rice Varieties on Silica Purification from Rice Husk Ash as Adsorbent for Mn(II)

The influence of rice types on the purification of rice husk ash was investigated by extracting silica and purifying it with a 12% NaOH solution, followed by the coprecipitation technique. Rice husk samples were from Mbay (Nagekeo Regency) with two different varieties, Ciherang and Inpari 42, and from Soa (Ngada Regency) with Ciherang variety. The silica produced in this research was characterized using UV Vis spectrophotometry to obtain the surface area value. The surface acidity value was calculated using the acid-base titration method. Using XRF, the purity of silica was determined. Ciherang Mbay, Ciherang Soa, and Inpari Mbay had surface area values of 18.397 m2/gram, 18.347 m 2 /gram, and 18.491 m 2 /gram, respectively. The surface acidity value of the three samples was 45.1 mmol/gram, 45.5 mmol/gram, and 44.7 mmol/gram, respectively. The purity of silica from rice husk ash Ciherang Mbay, Ciherang Soa, and Inpari Mbay samples based on XRF was 98.6%, 98.3%, dan 99.2%, respectively. Silica with the highest purity (Inpari Mbay variety) was applied as an adsorbent in the adsorption process of manganese (Mn(II)) metal ion with an adsorption capacity of 212.76 µmol/gram and adsorption energy of 38.165 kJ/mol through chemical adsorption. Keywords : purification, rice varieties, silica, adsorption, manganese

Spectral pattern analysis of rice varieties with proximal sensing method and sentinel-2 imagery

Rice growth monitoring through remote sensing devices, such as Sentinel-2 imagery has been widely used, yet the accuracy level is different due to variations in altitude and object reflectance. Proximal sensing provides site (ground-level) monitoring via high-resolution sensors. Spectroradiometer is a proximal sensing device that can continuously record the spectral pattern of an object. This research aims to examine the spectral pattern characteristic of Grendel sticky and Ciherang rice varieties based on proximal sensing and to investigate the relationship between the reflectance value of spectroradiometer measurements and Sentinel-2 image extraction. Based on the spectral pattern analysis, the Ciherang variety reached the maximum reflectance value for red-edge and NIR wavelength at 56 DAP (reproductive stage) and then decreased at 81 DAP (ripening stage). In comparison, the Grendel variety reached 81 DAP (reproductive stage) and dropped to 86 DAP (ripening stage). Based on linear regression, at 56, 81, 86, and 90, DAP indicated the reflectance values of spectroradiometer measurement are equivalent to the value of sentinel-2 image extraction with an average of R2 above 86%.

Analysis of the utilization of rice seeds of improved variety (Inpari 32) in Indramayu District, West Java

Indramayu is the district with the highest rice production in West Java. Adequate seed availability is required to support its production. This study analyzes the utilization of Inpari 32, an improved rice variety, and its distribution problems. The study was conducted in Indramayu in 2021. The data collected included primary and secondary data. Primary data was gathered by interviewing 30 lowland rice farmers, while secondary data was collected from relevant institutions. Data analysis was done by analyzing farming profitability and varietal distribution. The study’s results show that in Indramayu, the use of Inpari 32 in 2021 reached 45.97% of the total area used for various varieties. Inpari 32 has shifted the dominance of Ciherang variety. The productivity of the Inpari 32 is 7.2 tons/ha GKP, generating a profit of IDR 17.70 million/ha/season. The problem in the distribution of Inpari 32 is the limited availability of seeds and description depicting its superiority. Therefore, Government support for the provision of seeds and socialization of its superiority to increase the dissemination of Inpari 32 is necessary.

Perkembangan Resistensi Wereng Batang Padi Cokelat (Nilaparvata lugens Stal) di Sentra Produksi Padi Kabupaten Tanjung Jabung Barat dan Tanjung Jabung Timur

The research took place from June-October 2020 at the rice production centersin Tanjung Jabung Barat and Tanjung Jabung Timur regency Jambi province. The resistance test of Nilaparvata lugens to the active ingredients of insecticide was carried out at the Pesticide and Weed Laboratory, Faculty of Agriculture, Jambi University. This study aimed to determine the resistance level of N. lugens of Rawa Medang and Sri Agung population (Batang Asam district, Tanjung Jabung Barat regency), and Parit Culum II and Teluk Dawan population (Muara Sabak district, Tanjung Jabung Timur regency) to the insecticides used. The active ingredients of insecticide tested were abamektin and dimehipo (N. lugens of Rawa Medang and Sri Agung population), and BPMC and fipronil (N. lugens of Parit Culum II and Teluk Dawan population). Mass rearing of N. lugens was carried out at the Pesticide and Weeds Laboratory using Ciherang variety as feed. Insecticide toxicity test on macroptera female adults of N. lugens was carried out by the feed dipping method with two stages, namely preliminary and main tests. Preliminary test was carried out on N. lugens field population 2nd generation (F2), while main test was carried out on field population (F2) and standard population (F41). The observed variables were N. lugens mortality and resistance ratio (NR). Mortality data of N. lugens at 72 hours after insecticide application was analyzed probit using the PoloPlus program. The results showed that N. lugens of Rawa Medang population has been resistant (NR=6.2) to abamektin and indicated to be resistant to dimehipo (NR=1.5), while Sri Agung population was indicated to be resistant to abamektin (NR=2.9) and dimehipo (NR=1.5). N. lugens of Parit Culum II population has been resistant to BPMC (NR=4.94) and fipronil (NR=44.62), while Teluk Dawan population was indicated to be resistant to BPMC (NR=2.76)