Abstract
Research on the role of predatory mites as biological control agents for the lucerne flea, Sminthurus viridis, is reviewed and their potential use in New Zealand pastoral systems is discussed. Three predatory mites are considered, the pasture snout mite (Bdellodes lapidaria), the spiny snout mite (Neomolgus capillatus), and the French anystis mite (Anystis wallacei). Of these, only B. lapidaria is already present in New Zealand but climate may limit its effectiveness in areas of New Zealand north and west of Palmerston North. Both N. capillatus and A. wallacei are established in Australia but data currently available suggest that the importation of only N. capillatus should be considered, subject to quarantine requirements. N. capillatus has been a particularly effective predator of lucerne flea in areas of Tasmania with a similar climate to the northern and western areas of the North Island. A survey of potential mite predators that already exist in New Zealand pastures should also be undertaken.
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