INVESTIGADORES
SCHNEIDER Marcela Ines
artículos
Título:
Short and Long-Term Effects of Endosulfan, Cypermethrin, Spinosad,
Autor/es:
RIMOLDI, FEDERICO; SCHNEIDER, MARCELA INÉS; RONCO, ALICIA
Revista:
JOURNAL OF ECONOMIC ENTOMOLOGY
Editorial:
ENTOMOLOGICAL SOC AMER
Referencias:
Año: 2012 vol. 105 p. 1982 - 1987
ISSN:
0022-0493
Resumen:
The susceptibility assessment of natural enemies to pesticides is relevant before the use
of selective pesticides and biological control agents within the framework of integrated pest management
programs. Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) is a predator considered
a potential biocontrol agent of agricultural pests in the Neothropical Region. The aim of this study was
to evaluate the short and long-term effects of two broad spectrum insecticides (cypermethrin and
endosulfan) and two biorational (spinosad and methoxyfenozide) registered in Argentina on youngChrysoperla externa (Hagen) (Neuroptera: Chrysopidae) is a predator considered
a potential biocontrol agent of agricultural pests in the Neothropical Region. The aim of this study was
to evaluate the short and long-term effects of two broad spectrum insecticides (cypermethrin and
endosulfan) and two biorational (spinosad and methoxyfenozide) registered in Argentina on young
C. externa adults under laboratory conditions by ingestion through drinking water. The assessed
end-points were: survivorship during preoviposition period, preoviposition time, fecundity and fertility
of females, and survivorship of the progeny. Total survivorship of adults was adversely affected
only by cypermethrin that reduced the survivorship of adults irrespective of sex. Although endosulfan
did not induce signiÞcant total mortality, it reduced the survivorship of females. All tested insecticides delayed the reproductive maturity of adults. Cypermethrin, endosulfan, and spinosad reduced the fecundity of females. Fertility was affected only by spinosad. Methoxyfenozide was the insecticide
inducing the lowest effects on reproductive parameters. No effects were observed on the survival of progeny with any of the tested compounds. In accordance with the International Organization for
Biological Control and Noxious Animals and Plants guidelines the insecticides were classiÞed according
to its lethal effects in the following toxicity classes: methoxyfenozide, spinosad, and endosulfan,
class 1 (innocuous); cypermethrin, class 2 (moderately toxic). However, if sublethaladults under laboratory conditions by ingestion through drinking water. The assessed
end-points were: survivorship during preoviposition period, preoviposition time, fecundity and fertility
of females, and survivorship of the progeny. Total survivorship of adults was adversely affected
only by cypermethrin that reduced the survivorship of adults irrespective of sex. Although endosulfan
did not induce signiÞcant total mortality, it reduced the survivorship of females. All tested insecticides delayed the reproductive maturity of adults. Cypermethrin, endosulfan, and spinosad reduced the fecundity of females. Fertility was affected only by spinosad. Methoxyfenozide was the insecticide
inducing the lowest effects on reproductive parameters. No effects were observed on the survival of progeny with any of the tested compounds. In accordance with the International Organization for
Biological Control and Noxious Animals and Plants guidelines the insecticides were classiÞed according
to its lethal effects in the following toxicity classes: methoxyfenozide, spinosad, and endosulfan,
class 1 (innocuous); cypermethrin, class 2 (moderately toxic). However, if sublethal