Journal
JOURNAL OF STORED PRODUCTS RESEARCH
Volume 52, Issue -, Pages 28-35Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jspr.2012.09.002
Keywords
Thiamethoxam; Diatomaceous earth; Rhyzopertha dominica; Populations; Grain commodities
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Funding
- Higher Education Commission (HEC), Islamabad, Pakistan [Av4-128]
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Bioassays were conducted to evaluate the effects of combining thiamethoxam at 0.25, 0.5 and 0.75 mg/kg of active ingredient with the diatomaceous earth (DE) formulation, SilicoSec, at the rate of 100 mg/kg against four Pakistan populations of the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae). The tests were carried out with adult beetles on wheat, maize, and rice. Mortality increased with increasing application rates and exposure intervals for each population. Individually, thiamethoxam alone was more effective at the high dose rate than DE alone, but after 14 days of exposure in most cases, there was greater mortality with DE than with the low dose of thiamethoxam. There was greater mortality in wheat than in rice or maize. Populations differed in susceptibility to treatments and production of progeny. (c) 2012 Elsevier Ltd. All rights reserved.
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