Archives of Phytopathology and Plant Protection (2006) 39, 445-455

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N.E. El-Wakeil, N.M. Gaafar and S. Vidal (2006)
Side effect of some Neem products on natural enemies of Helicoverpa (Trichogramma spp.) and Chrysoperla carnea
Archives of Phytopathology and Plant Protection 39 (6), 445-455
Abstract: The present work was conducted to evaluate the side effect of Neem products as natural insecticide on some of natural enemies of Helicoverpa armigera Hüb. (Trichogramma spp. and Chrysoperla sp.). The work is divided into laboratory and greenhouse experiments. The laboratory experiments dealt with the side effects of Neem products: NeemAzal-T/S, NeemAzal Blank, NeemAzal PC 05 and NeemAzal PC 05 Blank on Trichogramma spp. and C. carnea (Stephen). Neem concentrations: 2, 1, 0.5 and 0.25% were arranged in a completely randomized block design and each treatment was replicated at least six times. Parasitism and emergence rates of T. pretiosum (Riley) and T. minutum (Riley), and predation rates of C. carnea and its longevity were investigated. The greenhouse experiments dealt with the side effects of Neem products on parasitism rates of T. pretiosum and T. minutum on three different cotton cultivars. There were no serious side effects on parasitism and emergence rates of Trichogramma spp. and on efficiency of Chrysoperla. Similarly, Neem products achieved a good control of H. armigera in laboratory and greenhouse. Therefore, Neem products are recommended for controlling Helicoverpa, and are compatible with mass release of Trichogramma and Chrysoperla for organic cotton production. Future field experiments are suggested to further elucidate the effects of Neem on H. armigera and its natural enemies.
(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): Stefan Vidal, Nabil E. El-Wakeil

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

Pest and/or beneficial records:

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


Helicoverpa armigera Cotton (Gossypium)
Chrysoperla carnea (predator) Helicoverpa armigera Cotton (Gossypium)
Trichogramma pretiosum (parasitoid) Helicoverpa armigera Cotton (Gossypium)
Trichogramma minutum (parasitoid) Helicoverpa armigera Cotton (Gossypium)
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