Age-dependent fecundity of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) with sublethal doses of gammacyhalothrin

Brazilian Archives of Biology and Technology

Alexandre Igor Azevedo Pereira²  Francisco De Sousa Ramalho²  Catarina De Medeiros Bandeira²  José Bruno Malaquias²  José Cola Zanuncio¹ 

[1] ,Embrapa Algodão Unidade de Controle Biológico Campina Grande PB ,Brasil

关键词: Predator;    pyrethroid;    stink bug;    hormesis;    biology;   

DOI  :  10.1590/S1516-89132009000500013

来源: SciELO

【 摘 要 】

Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) was exposed to gammacyhalothrin to study the stimulatory effect of low concentrations of this pyrethroid. The doses studied were 23.4375, 11.7188, 5.8594, 2.9297, 1.4648, 0.7324 mg.litre-1 and water, as control. The third, fourth, and fifth instars of P. nigrispinus were shorter with all the doses of this insecticide. The survival and longevity of this predator was highest with the lowest doses. The oviposition period of P. nigrispinus decreased as the doses increased. The lowest pre-and postoviposition periods were found with 11.7188 mg.litre-1 of gammacyhalothrin. The dose 0.7324 mg.litre-1 increased the clutch interval. The egg viability was similar between the treatments. The number of eggs per clutch, clutches per female, incubation period, and female body weight were not affected. The hormesis response could be used as a tool for IPM programs, allowing the manipulating parameters of this predator in synergism with this insecticide.

【 授权许可】

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