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Advances in the Strategy of Use of the Predaceous Bug Macrolophus caliginosus (Heteroptera: Miridae) in Glasshouse Crops
Editor(s): Oscar Alomar; Robert N. Wiedenmann
Author(s): Jean-Claude Malausa, Yannie Trottin-Caudal
Print Publication Date: 1996

A strategy for using the predaceous heteropteran Macrolophus caliginosus Wagner (Heteroptera: Miridae) was studied to control the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). in tomato crops in experimental green-houses. The timing of releases, the quantity of insects released, and the development stage to be released were compared. Results showed the importance of having 2 separate releases, I early in the cycle of whitefly followed by a later release. Excellent levels of control were obtained with releases of 10 predators per plant, which, unfortunately is not economically feasible. However, good control of whitefly populations was obtained even with releases of a total of 4 predators per plant in 2 release periods. It will be necessary to carry on these experiments to determine a strategy which will be compatible with the possibilities of mass rearing this species.

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