Abstract：
:Lethal and sub lethal effects of fresh and old residues of azadirachtin, spinosad, Bacillus thuringiensis var. kurstaki (Bt var. k), and deltamethrin, were evaluated at their recommended field doses against adult and immature stages of Trichogramma brassicae under in vitro conditions. The experiments were carried out at the Entomology section of Division of Crop Protection, ICAR Research Complex for NEH region, Umiam, Meghalaya, in 2012-2013. The effects of different pesticides were determined by bioassays using the residual film method, the diet contamination method, the pupal dip method and the topical application technique. The four pesticides were found harmful to adult T. brassicae after ingestion, however surface contact bioassays revealed that Bt var. k was the least toxic pesticide. Except Bt var. k, other three pesticides were found harmful also to the immature stages of T. brassicae and significantly affected parasitism potential, adult emergence, longevity of adults, and sex ratio of the progeny. Deltamethrin and azadirachtin were the most harmful, even after 15 days of application. Spinosad was found to be relatively safe to T. brassicae after 15 days of application. As Bt appeared to be the least toxic pesticide for T. brassicae, it could be used for the management of severe infestations of lepidopteran pests in cruciferous ecosystems. If essential, spinosad may be used 15 days after parasitoid release, thus minimizing the chances of parasitoid exposure.
journal_name
Saudi J Biol Scijournal_title
Saudi journal of biological sciencesauthors
Thubru DP,Firake DM,Behere GTdoi
10.1016/j.sjbs.2016.04.007subject
Has Abstractpub_date
2018-05-01 00:00:00pages
680-688issue
4eissn
1319-562Xissn
2213-7106pii
S1319-562X(16)30019-5journal_volume
25pub_type
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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journal_title：Saudi journal of biological sciences
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doi：10.1016/j.sjbs.2016.11.001
更新日期：2018-05-01 00:00:00
