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Introduction of Trichogramma pretiosum Riley against Heliothis armigera (Hb.) in the Sudan


, : Introduction of Trichogramma pretiosum Riley against Heliothis armigera (Hb.) in the Sudan. Proceedings of the 3rd international conference on plant protection in the tropics, Genting Highlands, Malaysia, 20-23 March 1990: 70-73

The parasitoid Trichogramma pretiosum was introduced to cotton fields in the Sudan for the control of the noctuid Heliothis armigera during October 1988. The parasitoid became established and caused 30% parasitism during 1988-89. Following harvest, the parasitoid was present from April to July on weeds and vegetable food plants of H. armigera and was recovered in September 1989. Extensive dispersal and substantial parasitism (29.7%) were observed during 1989-90.

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