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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 70, No. 2, 2010, pp. 221-227
Bioline Code: cj10024
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 70, No. 2, 2010, pp. 221-227

 es Efecto de algunos insecticidas aplicados en concentraciones subletales en la supervivencia y longevidad de adultos de Aphidius ervi check for this species in other resources (Haliday) (Hymenoptera: Aphidiidae)
Araya, Jaime E.; Araya, Manuel & Guerrero, María Angélica

Resumen

Se evaluaron en laboratorio los efectos de cuatro insecticidas (dimetoato, pirimicarb, imidacloprid, y spinosad) aplicados en torre Potter ST4 en concentraciones subletales (50% de las dosis comerciales recomendadas para el control de áfidos) sobre adultos del afídido Aphidius ervi check for this species in other resources Haliday, un importante parasitoide del pulgón de la arveja Acyrthosiphon pisum check for this species in other resources (Harris). El tratamiento más selectivo sobre el himenóptero fue imidacloprid, seguido en orden decreciente por spinosad, pirimicarb, y finalmente dimetoato, compuesto que eliminó rápidamente al parasitoide y su capacidad de producir descendencia. Se distinguieron tres grupos de toxicidad. El tratamiento menos dañino para los adultos de A. ervi fue imidacloprid; seguido por un grupo de selectividad media formado por spinosad y pirimicarb; y por último dimetoato, que fue extremadamente tóxico.

Palabras-clave
Acyrthosiphon pisum, Aphidius ervi, dimetoato, imidacloprid, pirimicarb, pulgón verde de la arveja, spinosad

 
 en Effects of some insecticides applied in sublethal concentrations on the survival and longevity of Aphidius ervi check for this species in other resources (Haliday) (Hymenoptera: Aphidiidae) adults
Araya, Jaime E.; Araya, Manuel & Guerrero, María Angélica

Abstract

The effects of four insecticides (dimethoate, pirimicarb, imidacloprid, and spinosad) applied in an ST4 Potter tower at sublethal concentrations (50% of those recommended commercially for aphid control) were studied in the laboratory on the aphidiid Aphidius ervi check for this species in other resources (Haliday) adults, an important parasitoid of the pea aphid Acyrthosiphon pisum check for this species in other resources (Harris). The most selective treatment on the hymenopteran was imidacloprid, followed in decreasing order by spinosad, pirimicarb, and finally dimethoate, which quickly eliminated the parasitoid and thus its capacity to produce progeny. Three toxicity groups were distinguished in the study. The least damaging treatment to adults of A. ervi was imidacloprid, followed by a group of medium toxicity made up of spinosad and pirimicarb, and lastly dimethoate, which was extremely toxic to A. pisum.

Keywords
Acyrthosiphon pisum, Aphidius ervi, dimethoate, green pea aphid, imidacloprid, pirimicarb, spinosad

 
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