NDLI: Deleterious effects of Bacillus thuringiensis on biological parameters of Habrobracon hebetor parasitizing Helicoverpa armigera

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Deleterious effects of Bacillus thuringiensis on biological parameters of Habrobracon hebetor parasitizing Helicoverpa armigera

Content Provider	Springer Nature Link
Author	Sedaratian, Amin Fathipour, Yaghoub Talaei Hassanloui, Reza
Copyright Year	2013
Abstract	The bacterium Bacillus thuringiensis (Bt) Berliner and the braconid wasp Habrobracon hebetor Say are valuable biocontrol agents attacking larval stages of Helicoverpa armigera (Hübner). Little information is available regarding combination of these biocontrol agents during integrated management of H. armigera. To address this knowledge gap, we document sublethal effects of Bacillus thuringiensis var. kurstaki (Btk) on the H. hebetor attacking H. armigera larvae infected with Btk. The results revealed that the duration of different life stages and fecundity of H. hebetor was significantly affected by sublethal treatments with Btk. We also present data supporting that sublethal concentrations of Btk could adversely affect life table parameters of H. hebetor. Sublethal treatments reduced the net reproductive rate (R 0) and there were also significant differences among the values of this parameter at all treatments tested. The intrinsic (r m ) and finite (λ) rates of increase were also significantly lower in parasitoid wasps reared on the treated larvae of H. armigera compared to control. These findings will be useful to develop appropriate strategies for assessing the risks of Btk to the parasitoids and safe deployment of both organisms in integrated pest management programs for sustainable crop production.
Starting Page	89
Ending Page	98
Page Count	10
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	59
Issue Number	1
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-07-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Helicoverpa armigera Bacillus thuringiensis Habrobracon hebetor Biological control Integrated pest management Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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