ORIGINAL ARTICLE
Change in life expectancy and stable age distribution of the diamondback moth, Plutella xylostella (L.) after indoxacarb treatment
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1
Department of Plant Protection, Faculty of Agricultural Sciences, Shahed University, Tehran,
33191-18651 Iran
2
Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
3
Iranian Research Institute of Plant Protection, Tehran, 14115-336 Iran
4
Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran, Karaj, 31587-77871 Iran
Corresponding author
Mohammad Mahmoudvand
Department of Plant Protection, Faculty of Agricultural Sciences, Shahed University, Tehran,
33191-18651 Iran
Journal of Plant Protection Research 2012;52(3):342-346
KEYWORDS
TOPICS
ABSTRACT
JOURNAL OF PLANT PROTECTION RESEARCH
Vol. 52, No. 3 (2012)
*Corresponding address:
msco1381@gmail.com
CHANGE IN LIFE EXPECTANCY AND STABLE AGE
DISTRIBUTION OF THE DIAMONDBACK MOTH,
PLUTELLA
XYLOSTELLA
(L.) AFTER INDOXACARB TREATMENT
Mohammad Mahmoudvand
1,2
*, Habib Abbasipour
1
, Aziz Sheikhi Garjan
3
, Ali Reza Bandani
4
1
Department of Plant Protection, Faculty of Agricultural Sciences, Shahed University, Tehran,
33191-18651 Iran
2
Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
3
Iranian Research Institute of Plant Protection, Tehran, 14115-336 Iran
4
Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran, Karaj, 31587-77871 Iran
Received: September 9, 2011
Accepted: April 17, 2012
Abstract:
Using high doses of insecticides is very dangerous for the environments and for humans. Decreased concentrations are
necessary. Insecticides have lethal and sublethal effects. The aim of the present study was to determine the behavior of
Plutella xylo-
stella
when exposed to sublethal doses of indoxacarb in terms of the age-specific fecundity (m
x
), life expectancy (e
x
) and stable age
distribution (C
x
). Also, the effects of sublethals on the pre-oviposition, oviposition and post-oviposition period of this insect were
investigated. The results show that exposure to this insecticide decreased the age-specific fecundity (m
x
) and life expectancy (e
x
) of
the insect. Although the pre-oviposition period was delayed in the treated groups, the post-oviposition period significantly decreased
when exposed to LC
10
and LC
25
doses (the dose concentrations killed 10 and 25% of the populations) of indoxacarb. The oviposition
period did not change. Furthermore, sublethal concentrations of the applied insecticide caused changes in the exposed structure.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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