Evaluation of rapeseed mustard genotypes and insecticides for the management of mustard aphid

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dc.contributor.advisorSingh, S.P.
dc.contributor.authorAthaulla, Imran
dc.date.accessioned2016-11-08T14:11:32Z
dc.date.available2016-11-08T14:11:32Z
dc.date.issued2011
dc.description.abstractStudies on evaluation of rapeseed–mustard genotypes for their susceptibility to mustard aphid, Lipaphis erysimi (Kalt.)and its management with chemical insecticides were conducted during Rabi, 2010-11 at research farm of Chaudhary Charan Singh Haryana Agricultural University, Hisar. Fifty advanced rapeseed-mustard genotypes were sown in a Randomized Block Design on November 8, 2010, for their reaction to the pest. Based on pooled average of aphid infestation index (AII) at full flowering and full pod formation stages, out of fifty advanced rapeseed-mustard genotypes, four genotypes (Ashirwad, Parasmani-2-10, BAUM-2007, and RH-7846) were found resistant having aphid infestation index upto 1.6. Maximum AII was found in BSH-1(4.3). Development of mustard aphid was studied on ten different rapeseed-mustard genotypes under laboratory conditions at grown up and flowering stage of plant. On genotype BSH-1 at grown up stage (leaves), nymphal period, reproductive period, adult longevity and total lifespan were minimum with 8.1, 15.7, 18.5 and 27.0 days, respectively. However on same genotype fecundity was maximum with 99.8 nymphs/female and per cent survival as 96 per cent. On the other hand on Purple Mutant nymphal period, reproductive period, adult longevity and total lifespan were maximum with 9.6, 17.1, 21.0 and 30.7 days, respectively. Fecundity and survival was minimum with 76.2 nymphs/female and 75 per cent, respectively. Similar trend was observed for these parameters at flowering stage (inflorescence) on the genotype Purple Mutant and BSH-1. Size and weight of aphid (nymph and adult) were maximum on BSH-1 and minimum on Purple Mutant. Among the insecticide treatments tested under field condition, imidacloprid at 0.003 and 0.002% concentration was found most effective, followed by methyl demeton and dimethoate. Highest cost benefit ratio was observed in case of imidacloprid (0.003%) with 1:18.0 followed by imidacloprid (0.002%) with 1:17.9 and minimum was observed in case of fipronil (0.008%) with 1:2.2.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/84456
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomology
dc.subjectSowing, Vegetative propagation, Germinability, Developmental stages, Biological phenomena, Biological development, Pruning, Planting, Biomass, Extractionen_US
dc.these.typeM.Sc
dc.titleEvaluation of rapeseed mustard genotypes and insecticides for the management of mustard aphiden_US
dc.typeThesisen_US
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