Horticultura Brasileira (2002) 20, 174-179

Leandro Bacci, Marcelo C. Picanço, Marcos Rafael Gusmão, Robert W. Barreto and Tederson Luiz Galvan (2002)
Inseticidas seletivos à tesourinha Doru luteipes (Scudder) utilizados no controle do pulgão verde em brássicas
[Selective insecticides to the earwing Doru luteipes (Scudder) used for controlling the green peach aphid in Brassicae]
Horticultura Brasileira 20 (2), 174-179
Abstract: The selectivity of the insecticides acephate, deltamethrin, dimethoate, methamidophos, methyl parathion, and pirimicarb were studied on the last nymphal phase of the green peach aphid Myzus persicae (Sulzer) (Homoptera: Aphididae) and on first, second, and third instar nymphs and adults of the Doru luteipes (Scudder) (Dermaptera: Forficulidae). Pirimicarb was highly selective in favor of all developmental stages of D. luteipes. Deltamethrin, methyl parathion and dimethoate were of median selectivity in favor of third instar nymphs of D. luteipes, as was also observed for the first two of these insecticides regarding to nymphs of first and second instars, respectively. Acephate was little selective in favor of second and third instars nymphs, and the same was observed for methyl parathion, deltamethrin and methamidophos to first, second and third instar nymphs, respectively. Dimethoate and methamidophos were more toxic to nymphs of first and second instars of the predator than to the last instar nymphs of the green peach aphid. D. luteipes adults and second and third instar nymphs were more tolerant to acephate, methyl parathion, and pirimicarb than first instar nymphs. D. luteipes first and second instar nymphs showed similar tolerance to deltamethrin, dimethoate, and methamidophos. Concentration-response curves for deltamethrin, methamidophos, and pirimicarb (to all development stages of D. luteipes), for dimethoate (to adults and first and second instar nymphs of the predator), for methyl parathion (to first and third instar nymphs of the predator), and for acephate (to adults of the predator) showed steeper slopes than the concentration-response curves of these insecticides established to M. persicae.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Leandro Bacci, Robert Weingart Barreto, Marcelo Coutinho Picanco, Tederson Luiz Galvan

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
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.
	Myzus persicae
Doru luteipes (predator)	Myzus persicae