Pesquisa Agropecuária Brasileira (2002) 37, 237-242

André Luiz Barreto Crespo, Marcelo Coutinho Picanço, Leandro Bacci, Eliseu José Guedes Pereira and Alfredo Henrique Rocha Gonring (2002)
Seletividade fisiológica de inseticidas a Vespidae predadores de Ascia monuste orseis
[Insecticide physiological selectivity to Vespidae predators of Ascia monuste orseis]
Pesquisa Agropecuária Brasileira 37 (3), 237-242
Abstract: This work aimed to study the selectivity of the insecticides carbaryl, deltamethrin, methyl parathion, permethrin and trichlorfon in relation to Ascia monuste orseis (Godart) (Lepidoptera: Pieridae) and to their predators Brachygastra lecheguana Latreille and Protonectarina sylveirae (Saussure) (Hymenoptera: Vespidae). Based on concentration-response curves and lethal concentrations for 90% of the population (LC₉₀), the differential selectivity index (DSI₉₀), relative toxicity index and relative tolerance index (ReTI₉₀) were calculated. Methyl parathion and trichlorfon were selective to B. lecheguana (DSI₉₀ = 2.83 and 1.75) and P. sylveirae (DSI₉₀ = 2.95 and 3.59) against A. monuste orseis. Deltamethrin and permethrin were selective to P. sylveirae (DSI₉₀ = 1.98 and 2.70) against A. monuste orseis, but weren't selective to B. lecheguana (DSI₉₀ = 0.21 and 0.64). B. lecheguana was less tolerant to deltamethrin, permethrin and trichlorfon than P. sylveirae (ReTI₉₀ = 9.36, 4.23 and 2.05), but the opposite was observed to carbaryl (ReTI₉₀ = 0.14). These two predators showed similar tolerance to methyl parathion (ReTI₉₀ = 1.04). Concentration-response curves of carbaryl, permethrin and trichlorfon to both predators, deltamethrin to B. lecheguana, and methyl parathion to P. sylveirae, showed greater slopes than these curves to A. monuste orseis.
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(original language: Portuguese)
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Database assignments for author(s): Leandro Bacci

Research topic(s) for pests/diseases/weeds:
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Ascia monuste		Brazil (south)
Brachygastra lecheguana (predator)			Brazil (south)
Protonectarina sylveirae (predator)			Brazil (south)