Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (2002) 126, 40-45

K. von Elling, C. Borgemeister, M. Sétamou and H.-M. Poehling (2002)
The effect of NeemAzal-T/S^®, a commercial neem product, on different developmental stages of the common greenhouse whitefly Trialeurodes vaporariorum Westwood (Hom., Aleyrodidae)
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 126 (1), 40-45
Abstract: The effects of NeemAzal-T/S^®, a commercial neem product, on different life development stages of the common greenhouse whitefly Trialeurodes vaporariorum Westwood (Hom., Aleyrodidae) were tested in laboratory and greenhouse experiments. Treatment of eggs of T. vaporariorum did not affect either larval emergence or the time until larval emergence. However, the proportion of pupal formation (based on the numbers of emerged larvae) was significantly reduced after a treatment of the eggs 3, 5 and 7 days after oviposition, respectively. The proportion of emerged adults (based on the number of formed pupae) was only significantly reduced when eggs had been treated 5 and 7 days after oviposition. In all neem treatments the time until adult emergence was significantly delayed. A neem treatment of early larval instars of T. vaporariorum resulted in a significantly reduced proportion of pupal formation, but subsequent adult emergence (based on the number of formed pupae) was not affected. Treating early larval instars of T. vaporariorum significantly prolonged the time until adult emergence. A neem treatment of T. vaporariorum pupae significantly reduced the proportion of emerged adults but had no effect on the time until adult emergence. Exposing female whiteflies to fresh, 24-h-old and 72-h-old residues of NeemAzal-T/S^® had no effect on the mortality of the insects, though the number of eggs laid per female was significantly reduced in T. vaporariorum exposed to fresh neem residues. These findings are discussed within the context of integrated control of whiteflies in the greenhouse environment.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Christian Borgemeister, Hans-Michael Poehling, Mamoudou Sétamou

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Trialeurodes vaporariorum		Germany