Pymetrozine, a selective aphicide is known to be harmless to natural enemies. This provides an opportunity for its use in IPM programs. We investigated the compatibility of Pymetrozine and two biological control agents; the aphid parasitoid, Diaeretiella rapae and the seven-spotted lady beetle, Coccinella septempunctata for the control of Brevicoryne brassicae on broccoli. Laboratory experiments were conducted in sleeve cages at 25oC and 50% RH, using a reduced rate of pymetrozine and a combination of the two biocontrols. These experiments showed that a combination of pymetrozine, D. rapae and C. septempunctata provided the best control for B. brassicae in the laboratory. Caged field experiments were conducted to find out if the laboratory results could be translated to the field.
Species 1: Hymenoptera Aphidiidae Diaeretiella rapae
Species 2: Coleoptera Coccinellidae Coccinella septempunctata (sevenspotted lady beetle)
Species 3: Homoptera Aphididae Brevicoryne brassicae (cabbage aphid)
Keywords: pymetrozine, biological control
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