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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 72, No. 4, 2012, pp. 523-527
Bioline Code: cj12079
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 72, No. 4, 2012, pp. 523-527

 en MATING BEHAVIOR OF THE PREDATOR Podisus nigrispinus check for this species in other resources (HETEROPTERA: PENTATOMIDAE) UNDER EXPOSURE TO NEEM
de Oliveira, Sharrine Omari Domingues; Barbosa, Wagner Faria; Malqui, Karina Soledad Vilca & Guedes, Raul Narciso Carvalho

Abstract

The preservation of natural enemies is one of the basic foundations for integrated pest management. Botanical insecticides have shown low impact on beneficial arthropods in relation to survival. Insecticides studies usually focus on the direct physiological effects of insecticides, whereas relatively little attention is placed on the behavioral response to exposure. A study was conducted to evaluate the effect of the botanical insecticide neem ( Azadirachta indica check for this species in other resources A. Juss.; Meliaceae) on the mating behavior of the predatory stinkbug Podisus nigrispinus check for this species in other resources (Heteroptera: Pentatomidae). Unmated 5 to 7 d-old adults, separate by sex, were exposed to azadirachtin per contact on the treated surface. The treatments were composed for: untreated male and female; untreated male and treated female; treated male and untreated female; and treated male and female. Azadirachtin affected the duration of first mating (Wilcoxon test, χ2 = 13.38, df = 3, p = 0.004), which resulted in a higher effective average time of mating (EATM50) for treatment whose only female was treated with azadirachtin. This finding points to a sublethal effect of azadirachtin on mating behavior of P. nigrispinus that may compromise its reproduction.

Keywords
Azadirachtin, Azadirachta indica, biological insecticide, natural enemy

 
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