Phytoprotection (2009) 90, 35-39

Éléonore Tremblay, André Bélanger, Marcel Brosseau and Guy Boivin (2009)
Toxicity effects of an insecticidal soap on the green peach aphid [Homoptera: Aphididae]
Phytoprotection 90 (1), 35-39
Abstract: Effects of an insecticidal soap on the survival, development and reproduction of the green peach aphid, Myzus persicae, were studied. Twenty-four hours after application at a concentration of 37.50 g L^-1, the soap caused 100% mortality in all aphid instars, and LC₅₀ (lethal concentrations causing 50% mortality in the population) were 1.50, 3.25 and 5.50 g L^-1 for first and second instars, third and fourth instars, and adult M. persicae, respectively. Aphids that survived the LC₅₀ had a shorter longevity than the controls. Both insecticidal soap and parasitoids could be used on a crop but, as the LC₅₀ of the third and fourth instars and adult M. persicae are higher than that of the aphid parasitoid Aphidius colemani (2.75 g L^-1), it is essential to avoid treating aphids with insecticidal soap when adult parasitoids are present in the crop.
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Database assignments for author(s): Guy Boivin

Research topic(s) for pests/diseases/weeds:
control - general
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
Aphidius colemani (parasitoid)	Myzus persicae