« Previous AbstractSuckling defect in mice lacking the soluble haemopoietin receptor NR6    Next Abstract"Solid phase microextraction of volatile emissions of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae): influence of fly sex, age, and mating status" »

J Econ Entomol

Title:		"Sub-Lethal Effects of lambda-Cyhalothrin on Behavior and Development of the Parasitoid Aphidius colemani (Hymenoptera: Braconidae) on kdr-Resistant and Susceptible Green Peach Aphid, Myzus persicae (Hemiptera: Aphididae)"
Author(s):		Alfaro-Tapia A; Alvarez-Baca JK; Figueroa CC; Fuentes-Contreras E;
Address:		"Centre in Molecular and Functional Ecology, Instituto de Ciencias Biologicas, Universidad de Talca, Talca, Chile. Centre in Molecular and Functional Ecology, Facultad de Ciencias Agrarias, Universidad de Talca, Talca, Chile"
Journal Title:		J Econ Entomol
Year:		2021
Volume:		114
Issue:		5
Page Number:		2032 - 2042
DOI:		10.1093/jee/toab147
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"The green peach aphid, Myzus persicae (Sulzer), is a pest mainly controlled with insecticides, and it can acquire resistance through different mechanisms. Pyrethroids can select the knock down resistance (kdr) mutation in M. persicae and can also produce lethal and sub-lethal effects on its main parasitoid, Aphidius colemani Viereck. However, kdr-resistant M. persicae exhibits a reduced response to alarm pheromone and increased vulnerability to natural enemies. To study the effects of sub-lethal concentrations of a pyrethroid on the aphid-parasitoid interaction, kdr-resistant and susceptible M. persicae were confronted with A. colemani with residual sub-lethal concentrations of lambda-cyhalothrin. The behavior, survival, and development of parasitoids were evaluated after exposure to lambda-cyhalothrin LC20 for adult parasitoids (0.52 mg/liter) for susceptible (Mp-SS, 0.56 mg/liter) and kdr-resistant M. persicae (Mp-RR, 12.15 mg/liter). The foraging and oviposition behaviors of the parasitoids were not affected by the lower parasitoid or Mp-SS LC20. Conversely, the higher Mp-RR LC20 significantly reduced parasitoid walking, the frequency of sting attempts, and successful stings, as well as aphid defensive behaviors, such as walking, kicking, and jerking. Therefore, the higher vulnerability of kdr-resistant M. persicae could not be capitalized by A. colemani parasitoids under a high concentration of lambda-cyhalothrin. Similarly, the parasitism rate, survival of progeny, productivity, sex ratio (proportion of females), longevity, and adult body mass were reduced, and the development time increased with a higher Mp-RR LC20. Our results suggest that A. colemani could efficiently control kdr-resistant and susceptible M. persicae only at lower lambda-cyhalothrin concentrations"
Keywords:		"Animals *Aphids Host-Parasite Interactions Nitriles Pest Control, Biological *Prunus persica *Pyrethrins *Wasps biological control insecticide knock-down resistance pyrethroid toxicity;"
Notes:		"MedlineAlfaro-Tapia, Armando Alvarez-Baca, Jeniffer K Figueroa, Christian C Fuentes-Contreras, Eduardo eng Research Support, Non-U.S. Gov't England 2021/07/28 J Econ Entomol. 2021 Oct 13; 114(5):2032-2042. doi: 10.1093/jee/toab147"