Journal of Applied Entomology (2005) 129, 526-533

Z. Adamski, M. Niewadzi and K. Ziemnicki (2005)
Inheritance of chorionic malformations and insecticide resistance by Spodoptera exigua
Journal of Applied Entomology 129 (9-10), 526-533
Abstract: Effect of exposure to the organophosphorus insecticide - fenitrothion [O,O-dimethyl-O-(4-nitro-3-methyl)phenyl] - on four generations of Spodoptera exigua Hübner (Lep., Noctuidae) larvae, with regard to the mortality and structure of the chorion of eggs laid was tested. Generations varied in the total mortality rate, although all of them showed some survival rate. The third and the fourth generations showed the lowest mortality among tested ones. Exposure to fenitrothion caused malformations in eggs. The chorion revealed cracks and diminutions of the outer layer. The quality and quantity of malformations increased proportional to the duration of exposure, e.g. the second exposed generation reveald more prominent changes than the first one. Malformations were observed in the next generations, which were not exposed to pesticide. The follicular cells, which are responsible for the structure and sculpture of the eggshell, must have inherited the malforming mechanism. Most probably, malformation takes place during the late development of eggs in the ovarioles.
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Link to article at publishers website
Database assignments for author(s): Zbigniew Adamski

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera exigua