The control of Rastrococcus invadens Williams (Hemiptera: Pseudococcidae) in Togo by the introduction of Gyranusoidea tebygi Noyes (Hymenoptera: Encyrtidae)

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Abstract
Rastrococcus invadens Williams was first noticed in Togo in 1981 and has since become a serious pest on many plants, especially mango and citrus. In June 1986, a programme for its biological control was begun, resulting in the introduction into Togo in October 1987 of an encyrtid parasitoid, Gyranusoidea tebygi Noyes. The parasitoid was reared under a simple system and releases were made from November 1987. The parasitoid established readily under a range of ecological conditions and produced significant control within the first year up to 100 km from each release point.