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Effects Of Botanical Insecticides On The Egg
Parasitoid Trichogramma Cacoeciae Marchal (Hym. Trichogrammatida
H. Abdelgader(1)
S. Hassan(2)
and Tag elsir E. Abdalla(1)
(1)Agricultural Research Corporation, Gezira Research Station, Crop protection Research Center, Entomology Section, P.O. Box 126, Wad Medani, Sudan
(2)Institute for Biological Control, Federal Biological Research Center for Agriculture and Forestry, Heinrichstr. 243, D- 64287 Darmstadt, Germany
Abstract
A Laboratory study was carried out to investigate the side effects on Trichogramma cacoeciae of two formulated products of each of two botanical insecticides: Azadirachtine (Neemazal T/S Blank and Celaflor® ) and Quassin (alcohol or water extracts). In one set of experiments, the results showed that by exposing adults of T. cacoeciae to residues of Azadirachtine formulations on glass plates (standard test method), the preparation was either harmful (Neemazal-Blank) or moderately harmful (Celaflor). The two Quassin formulations tested were harmless. When treated host eggs were offered to Trichogramma adults, all treatments were almost harmless. In another test, host eggs parasitized at different times (1-8 days) were sprayed on the same day, only Neemazal was slightly to moderately harmful reducing adult emergence. The results showed, in general, that both Azadirachtion and Quassin were relatively safe to the tested parasitoid and could therefore be used in combination with Trichogrammareleases.
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