Journal of Economic Entomology (1998) 91, 1180-1185

P.G. Weintraub and A.R. Horowitz (1998)
Effects of translaminar versus conventional insecticides on Liriomyza huidobrensis (Diptera : Agromyzidae) and Diglyphus isaea (Hymenoptera : Eulophidae) populations in celery
Journal of Economic Entomology 91 (5), 1180-1185
Abstract: Field trials compared the effects of 2 translaminar insecticides (abamectin and cyromazine) and 3 nontranslaminar insecticides (cypermethrin, methomyl, methamidophos) for control of Liriomyza huidobrensis (Blanchard) and their effect on Diglyphus isaea Walker in celery (Apium graveolens L.). Abamectin and cyromazine were sprayed alternately once every 2 wk throughout the growing season. Methomyl and methamidophos, and methomyl and cypermethrin were similarly applied alternately. Yellow sticky traps were not a reliable method for determining the effects of these insecticides on L. huidobrensis population levels in small plots. Evaluations of population levels were based on emergence of insects from plants in the laboratory. There were no significant differences between leafminer or parasitoid populations from nontranslaminar insecticides versus the control. The translaminar insecticides significantly reduced leafminer and parasitoid populations. Parasitoids and leafminers were not evenly distributed in the plant; significantly more were found in the outer whorls of petioles than in the inner whorls. Yield was consistently and significantly higher in translaminar-insecticide-treated plots. Implications of these results on management practices are discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Phyllis G. Weintraub, Abraham Rami Horowitz

Research topic(s) for pests/diseases/weeds:
control - general
damage/losses/economics
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Liriomyza huidobrensis	Celery (Apium graveolens)
Diglyphus isaea (parasitoid)	Liriomyza huidobrensis	Celery (Apium graveolens)