Effect of selectivity of herbicides and plant growth regulators used in sugarcane crops on immature stages of Trichogramma galloi (Hymenoptera: Trichogrammatidae)

Planta Daninha

H.n. Oliveira²  M.r. Antigo¹  G.a. Carvalho¹  D.f. Glaeser² 

[1] ,Embrapa Agropecuária OesteDourados MS ,Brasil

关键词: Saccharum spp.;    egg parasitoid;    Diatraea saccharalis;    biological control;    chemical control;    toxicity;    Saccharum spp.;    parasitoide de ovos;    Diatraea saccharalis;    controle biológico;    controle químico;    toxicidade;   

DOI  :  10.1590/S0100-83582014000100014

来源: SciELO

【 摘 要 】

Herbicides and plant growth regulators are often used in sugarcane management. However, the use of non-selective pesticides can cause adverse effects on the efficiency of beneficial insects in integrated pest management. Within this context, this study aimed to evaluate the effect of such products on the immature stages of the parasitoid Trichogramma galloi. Eggs of Diatraea saccharalis containing the parasitoid at the egg-larva stage and at the prepupal and pupal stages were immersed in test solutions of the following pesticides (maximum recommended doses for sugarcane): herbicides clomazone and diuron + hexazinone, and plant growth regulators trinexapac-ethyl and sulfometuron-methyl. The biological properties evaluated were emergence (F1 and F2) and number of eggs parasitized by T. galloi (F1). The products were classified according to percentage of reduction in emergence and parasitism: harmless (<30%), slightly harmful (30-79%), moderately harmful (80-99%) and harmful (>99%). The pesticides evaluated were considered to be harmless or slightly harmful to immature T. galloi and, thus, their use should be preferred for preserving this parasitoid species in sugarcane management programs.

【 授权许可】

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