NDLI: Azadirachtin-mediated reproductive response of the predatory pirate bug Blaptostethus pallescens

Content Provider	Springer Nature Link
Author	Celesti, Daiane Braoios, Guilherme I. Ramos, Rodrigo S. Gontijo, Lessando M. Guedes, Raul Narciso C.
Copyright Year	2014
Abstract	The little-known pirate bug Blaptostethus pallescens Poppius is a biocontrol agent observed in tropical tomato fields in Brazil regulating fruit borer populations. In this study, the lethal response of B. pallescens to the bioinsecticide azadirachtin and to two synthetic insecticides, chlorpyrifos and deltamethrin, was assessed. The mild effect of the azadirachtin label rate (0.006 mg a.i. ml−1) on the predator (median lethal time (LT50) of 27 days), relative to label rates of deltamethrin (0.02 mg a.i. ml−1) and chlorpyrifos (1.44 mg a.i. ml−1) (with LT50 of 25 and 60 min, respectively) led to the assessment of its potential sublethal effects. Azadirachtin did not cause behavioral avoidance in the pirate bug, but the daily fecundity, adult progeny production and sex ratio were impaired when both male and female parents were exposed. These effects reduced the population growth of the predator in subsequent generations. Therefore, although safer than the conventional synthetic insecticides tested, the bioinsecticide azadirachtin does impair predator reproduction requiring attention when used in fields with this biological control agent.
Starting Page	697
Ending Page	705
Page Count	9
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	59
Issue Number	6
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-07-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioinsecticide Biorational insecticide Neem Selectivity Sublethal effects Tuta absoluta 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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