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vol.31 issue5Selectivity of Lecanicillium lecanii (Zimm.) Zare & W. Gams (class-form: Hyphomycetes) to the parasitoid Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera: Trichogrammatidae)Sample size for estimating the ten-day averages of global solar radiation in Rio Grande do Sul State, Brazil author indexsubject indexarticles search
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Ciência e Agrotecnologia

Print version ISSN 1413-7054On-line version ISSN 1981-1829


GIOLO, Fabrizio Pinheiro et al. Selectivity of pesticides used in peach orchard to Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae). Ciênc. agrotec. [online]. 2007, vol.31, n.5, pp.1396-1401. ISSN 1413-7054.

The selectivity of ten commercial pesticide formulations used in peach orchard was evaluated in laboratory tests (25±1 ºC, RH 70±10% and 14 hours photophase) by exposing the adult of Trichogramma pretiosum Riley to fresh dry pesticide film applied on glass plates. The number of eggs parasitized per adult female and the reduction in parasitism (RP) compared to control (treated with water) were used to measure the effect of the chemical in harmless (<30% RP), slightly harmful (30-79% RP), moderately harmful (80-99% RP) and harmful (>99% RP). The pesticides captan, copper oxide, dithianon, mancozeb and methoxyfenozide were harmless; gliphosate and mineral oil was slightly harmful and abamectin, cyanamide and etofenprox were harmful to T. pretiosum.

Keywords : Pesticides; egg parasitoid; biological control; Prunus persica L..

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