INFLUENCE OF PHYSICAL FORM OF HOST GRAIN ON GROWTH AND DEVELOPMENT OF RUSTY GRAIN BEETLE, Cryptolestes ferrugineus (Stephens) AND ITS MANAGEMENT WITH INSECTICIDES

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dc.contributor.advisorMADHUMATHI, T
dc.contributor.authorCHAKRABORTY, DEBJYOTI
dc.date.accessioned2019-03-16T06:14:10Z
dc.date.available2019-03-16T06:14:10Z
dc.date.issued2018
dc.descriptionD5632en_US
dc.description.abstractThe present investigation on “Influence of physical form of host grain on growth and development of rusty grain beetle, Cryptolestes ferrugineus (Stephens) and its management with insecticides” was conducted in the laboratory, Department of Entomology, Agriculture college, Bapatla, Guntur district, Andhra Pradesh during 2017-18. Sorghum brokens was found to be the most suitable host for C. ferrugineus with minimum development period (44.40 days), maximum growth index (1.33), the highest number of adults of C. ferrugineus (418.20), the highest per cent adult emergence (70.80) and higher weight loss (11.50%). The highest development period of C. ferrugineus was found to be 60.60 days on wheat brokens while it was minimum in sorghum brokens (44.4 days). The moisture per cent was 11.88, 11.02, 12.74 and 10.43 on brokens grains of sorghum, wheat, maize and rice. The maximum moisture content was recorded on maize brokens (12.74) and minimum on sorghum flour (8.31). The damage due to the development of C. ferrugineus was 2.97, 4.13, 4.56 and 5.84 per cent on sorghum, rice, maize and wheat whole grains, respectively. Machilipatnam population of C. ferrugineus was 34.66 and 21.35 folds resistant at LC50 level and 4.14 and 9.89 folds resistant at LC99.9 level to malathion and deltamethrin, respectively in comparison with susceptible Rajahmundry population. Similarly, Bapatla population of C. ferrugineus was 16.66 and 1.75 folds resistant at LC50 level to malathion and deltamethrin, respectively and at LC99.9 it was 1.92 and 2.57 folds resistant. Among the new insecticides tested for the management of insecticide resistant Machilipatnam population of C. ferrugineus, chlorfenapyr was found to be the best at LC99.9 level with the highest relative toxicity (9.84 and 4.26 times) than malathion and deltamethrin followed by emamectin benzoate (4.84 and 2.09 times). Emamectin benzoate and spinosad were effective at LC50 level (13.68; 11.23 and 4.14; 3.40 times) compared to malathion and delamethrin. Lufenuron expressed lowest relative toxicity at LC50 and LC99.9 level (1.04 and 0.69 times) to malathion and (0.85 and 0.29 times) to deltamethrin.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810098733
dc.keywordsINFLUENCE, PHYSICAL, HOST GRAIN, GROWTH, RUSTY GRAIN BEETLE, Cryptolestes ferrugineus, Stephensen_US
dc.language.isoen_USen_US
dc.pages92en_US
dc.publisherAcharya N.G. Ranga Agricultural Universityen_US
dc.research.problemINFLUENCE OF PHYSICAL FORM OF HOST GRAIN ON GROWTH AND DEVELOPMENT OF RUSTY GRAIN BEETLE, Cryptolestes ferrugineus (Stephens) AND ITS MANAGEMENT WITH INSECTICIDESen_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeINFLUENCE OF PHYSICAL FORM OF HOST GRAIN ON GROWTH AND DEVELOPMENT OF RUSTY GRAIN BEETLE, Cryptolestes ferrugineus (Stephens) AND ITS MANAGEMENT WITH INSECTICIDESen_US
dc.these.typeM.Scen_US
dc.titleINFLUENCE OF PHYSICAL FORM OF HOST GRAIN ON GROWTH AND DEVELOPMENT OF RUSTY GRAIN BEETLE, Cryptolestes ferrugineus (Stephens) AND ITS MANAGEMENT WITH INSECTICIDESen_US
dc.typeThesisen_US
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