Management of Alternaria Leaf Spot using Available Fungicides (Combi Products) in Sunflower K. Venkataramanamma, K. Prabhakar, S. Neelima, B.V, Ravi Prakash Reddy, D. Lakshmi Kalyani, Y. Srujana, K. Mohan vishnu vardhan, P. Aruna Sri Indian Journal of Agricultural Research, 2025 Back ground: Alternariaster leaf blight caused by Alternariaster helianthi is an important disease on sunflower, caused yield losses upto 80%. It is seed and air borne. Management of this disease is very important to avoid yield losses, hence, this experiment was planned with available fungicides (combi products) in the market. Methods: A field experiment was carried out on management of Alternariaster leaf spot disease for three years i.e., kharif 2018, 2019 and 2020 at RARS, Nandyal under AICRP on Sunflower scheme. Seven treatments were imposed in three replications with different fungicides by using the hybrid KBSH-44 in RBD design. Result: Pooled analysis results indicated that among different treatments, the treatment T3: (Seed treatment with carbendazim 12% + mancozeb 63% wp @ 2g/kg seed followed by two foliar sprays with Trifloxystrobin 25%+ tebuconazole 50% (Nativo 75WG)@ 0.25g/l) has recorded low severity (PDI) of 37% with higher yield of 1382 kg/ha, which was followed by the treatment T1 (Seed treatment with carbendazim 12% + mancozeb 63% WP (SAAF 75 WP) @ 2g/kg seed followed by two foliar sprays with difenconazole 25% + propiconazole 25% (TASPA 500EC) @ 0.3 ml/l) has recorded disease severity (PDI) of 40.95% and yield of 1363 kg/ha, where as control recorded high PDI of 53.38% and lower yield of 1200 kg/ha. Regarding B:C ratio, the treatment T1 recorded high B:C ratio i.e., 1.65, followed by T4 and T3 recorded 1.59 and 1.57 respectively. Hence, it was concluded that above three treatments were recommended for disease management as they are on par with each other and recorded more B:C ratio than others.
DUS characterization of rice (Oryza sativa L.) germplsm N. K. Gayathri, Y. Srujana, N. C. Venkateswarlu Electronic Journal of Plant Breeding, 2023 Thirty six traditional rice cultivars conserved in germplasm collection of Regional Agricultural Research Station, Nandyal, Acharya N. G. Ranga Agricultural University were characterized for 23 qualitative and six quantitative characters following the Distinctiveness, Uniformity and Stability (DUS) descriptors, as per PPV & FRA, 2007 during kharif 2020. Out of 29 characters studied five characteristics were found monophormic, ten were dimorphic, five were of trimorphic, seven were tetramorphic and decorticated grain shape recorded five states of expression. This study will be useful for farmers for identification of varieties and researchers for selecting desirable genotypes for breeding programmes and also to register varieties under PPV & FR Act of 2001. Hybridization between parents selected from cluster III and cluster IV followed by cluster I and cluster IV and cluster II and cluster IV with the importance to traits like stem length, test weight and decorticated grain length in segregating populations can be suggested for development of better varieties from this 36 genotypes.
Evaluation of some promising insecticides against bollworm complex in cotton M. Sivarama Krishna, Y. Srujana, D. Lakshmi Kalyani, Rishi Kumar, N.C Venkateshwarlu Journal of Entomological Research, 2023 AbstractIn 2-year study eleven insecticides were evaluated and pooled data indicated that pyridalyl 10 EC @ 750 ml/ha had recorded lowest mean green boll damage of 32.89% and 29.06% respectively due to pink bollworm during first and second sprays, the same insecticide had recorded a lowest open boll, locule damage and lowest pink bollworm larval recovery per twenty green bolls of 11.33, 3.83% and 0.83 / 20 green bolls respectively. Pyridalyl 10 EC had recorded highest yield of 1479 kg/ha with highest incremental cost-benefit ratio of 24.62 owing to its low cost.
Evaluation of some promising insecticides against sucking pest complex in cotton M. Sivarama Krishna, Y. Srujana, D. Lakshmi Kalyani, Rishi Kumar, N.C. Venkateshwarlu Journal of Entomological Research, 2023 AbstractResults of 2-year revealed that flonicmide 50% WG @ 150 g/ha and dinotefuran 20% SG @ 150 g/ha recorded lowest mean number of jassids. Spiromecifen 240 SC @ 600 ml/ha followed by Dinotefuran 20% SG @ 150 g/ha recorded significantly low thrips population as compared to control. Highest yield of 1414 kg/ha was recorded in Dinotefuran 20% SG @ 150 g/ha.
Forecasting helicoverpa armigera (Lepidoptera: Noctuidae) larval phenology in pigeonpea and chickpea crops using growing degree days Journal of Agrometeorology, 2020
Impact of leaf damage by defoliators on yield of soybean as a sole crop and as a main crop in intercropping systems Kiran Gandhi Bapatla, R. H. Patil, Srujana Yeddula International Journal of Pest Management, 2018 Defoliators are common insect pests of soybean and often cause economic losses. Insecticides are the first option that farmers choose to minimize the damage caused by the defoliators, and the result is not only the emergence of resistance to insecticides in the pests but also environmental pollution. A field experiment carried out at the University of Agricultural Sciences, Dharwad, India, in 2013 and 2014 in the kharif season (June to September) tested nine intercrops in soybean – all grown as rain-fed crops – for their ability to reduce the damage caused by defoliators to soybean leaves and the effect on grain yield of soybean. Of the three species of defoliators, namely Spodoptera litura, Hedylepta indicata, and Diachrysia orichalcea, S. litura was the most severe. Maize and pigeonpea proved the most effective intercrops because of their phenology, repellent chemicals, and physical barriers and also because they were not the natural hosts of the defoliators and did not compete with soybean. In these two crops, the incidence of the defoliators and the extent of damage to soybean leaves were the lowest and the yields were the highest (3.56 t ha−1 in soybean–maize and 3.25 t ha−1 in soybean–pigeonpea).
Probing gut microflora community of the bihar hairy caterpillar, Spilosoma obliqua walker: By next generation sequencing Journal of Pure and Applied Microbiology, 2016
Biocidal activity of Bacillus thuringiensis on Plutella xylostella L. Journal of Pure and Applied Microbiology, 2015
Insect population suppression using genetically modified insects Biochemical and Cellular Archives, 2014
