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ECOFRIENDLY MANAGEMENT OF THE PULSE BEETLE, Callosobruchus chinensis L. INFESTING PEA SEEDS WITH VEGETABLE OILS

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Title ECOFRIENDLY MANAGEMENT OF THE PULSE BEETLE, Callosobruchus chinensis L. INFESTING PEA SEEDS WITH VEGETABLE OILS
 
Creator BHARDWAJ, ANUJA
 
Contributor VERMA, SUBHASH CHANDER
 
Subject oils, sowing, plant oils, eggs, mustard, concentrates, peas, plant extracts, biological phenomena, fruits
pulse beetle,pea seeds,vegetable oils
 
Description ABSTRACT
The present investigations on “Ecofriendly management of the pulse beetle,
Callosobruchus chinensis L. infesting pea seeds with vegetable oils” were carried out in the
Department of Environmental Science, College of Forestry, Dr. Y.S. Parmar University of
Horticulture and Forestry, Nauni, Solan (H.P.). The vegetable oils of mustard, neem, karanj, cedar,
apricot and olive at 1, 3 and 5 per cent concentrations were evaluated against Callosobruchus
chinensis L. infesting pea seeds. Among the six vegetable oils, neem oil possessed reasonably high
and immediate toxicity irrespective of its concentrations. It resulted 22.22 per cent overall mortality
within a day of treatment, while in 3 days mortality increased to 55.56 per cent (3 and 1%
concentrations were equally effective with 50 and 43.33% kill). After 7 days, highest mortality (90%)
was observed in seeds coated with neem oil followed by karanj (77.78%), cedar (66.67%) and
mustard (36.67%) in descending order of toxicity. After 10-days of exposure, complete kill was
recorded in neem oil at 5 per cent concentration. On day-15, mortality in the control had substantially
increased to 61.11 per cent. Egg laying was minimum on neem oil coated pea seeds (4.89 eggs/ 5
females). Progeny development from the eggs laid on pea seeds treated with neem and karanj oil was
negligible. Maximum protection to treated pea seeds in terms of reduction in seed damage by
C.chinensis was provided by neem oil (0.11%) followed by karanj (0.18%) and cedar (0.29%). Neem
(91.33%) and karanj oil (88.67%) were the best and equally effective treatments, which even at 1 per
cent concentration provided 89.33 and 84.67 per cent germination. Minimum incidence of Aspergillus
sp. and Alternaria sp. was observed in neem followed by karanj, cedar, mustard and olive oil treated
pea seeds. Incidence of Fusarium sp. was nil in neem, karanj and cedar oil and incidence of Mucor sp.
was nil in both neem and mustard oil treated seeds. In case of vegetable oils as grain protectant all the
vegetable oils were effective against pulse beetle up to two month of treatment, neem with 17.78 per
cent and karanj with 14.81 per cent mortality were most effective against C.chinensis. All the tested
vegetable oils at 5 per cent concentration inhibited oviposition and progeny development by pulse
beetle up to three and five months of treatment respectively. Seed damage by pulse beetle was
protected up to 5 months of treatment at 5 per cent concentration. Maximum seed germination was
observed in neem (86.67%) and karanj (84.67%) and both were superior over rest of the treatments.
 
Date 2017-01-19T15:29:19Z
2017-01-19T15:29:19Z
2011
 
Type Thesis
 
Identifier 47618
http://krishikosh.egranth.ac.in/handle/1/97150
 
Language en
 
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