BIOLOGY AND MANAGEMENT OF RICE WEEVIL, Sitophilus oryzae L. IN POP SORGHUM
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Date
2007-08-29
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University of Agricultural Sciences GKVK, Banglore
Abstract
Investigations on rice weevil, Sitophilus oryzae (L.) with respect to
biology, reaction of genotypes, efficacy of grain protectants and
organoleptic evaluations were carried out under laboratory condition at
Department of Agricultural Entomology, University of Agricultural
Sciences, Dharwad during 2005-06.
The biology of the rice weevil, S, oryzae on pop sorghum grain
variety Talakal-6 revealed the larval and pupal period of 25.8 ± 3.70 and
7.4 + 0.54 days, respectively. Total life cycle from egg to adult completed
in 40.2 + 4.69 days. Among the different grain sorghum and pop sorghum
varieties screened against S. oryzae, maximum per cent of grain damage,
per cent weight loss, population buildup and minimum per cent of
germination was observed in Shiggaon local, while Mugad local was
proved relatively resistant. DSV-3 was found relatively resistant among
grain sorghum varieties.
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