Abstract

SILVA, ROGÉRIO ANTÔNIO; CARVALHO, GERARDO ANDRADE; CARVALHO, CÉSAR FREIRE  and  BASTOS SILVA, DIEGO. Effects of pesticides on eggs of Chrysoperla externa (Neuroptera: Chrysopidae) and consequences on subsequent development. Rev. Colomb. Entomol. [online]. 2012, vol.38, n.1, pp.58-63. ISSN 0120-0488.

The effects of six pesticides applied to the coffee crop on eggs and their consequences on the subsequent developmental stages of Chrysoperla externa (Neuroptera: Chrysopidae) were evaluated under laboratory conditions. The pesticides and water (control) were sprayed on eggs using a Potter's tower. After spraying, forty eggs per treatment were individualized in glass tubes and maintained in a climatic chamber, in order to evaluate immature development of this predator. The treatments showed significant differences for egg viability and survival of first-instar larvae. Chlorpyrifos, sulphur and copper oxichlorate reduced the treated egg viability, whereas both sulphur and betacyfluthrin reduced the survival of first-instar larvae. Endosulphan and azociclotin reduced the daily oviposition of this green lacewing species. The harmless products (Class 1, E < 30%), can be recommended for use in integrated pest management programs in coffee crops, in order to preserve this predator.

Keywords : Coffea arabica; Green lacewing; Pesticides; Selectivity.

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