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The obscure mealybug (Pseudococcus viburni) is a serious cosmopolitan pest of apples and many other crops. New options for managing this species in New Zealand include the release in 2001 of the host-specific parasitoid, Pseudaphycus maculipennis, and the recent identification of a synthetic sex pheromone. This study evaluated the efficacy of obscure mealybug sex pheromone in the field and serendipitously discovered that the parasitoid was also attracted to the baited traps. The presence of female P. maculipennis in baited (but not control) traps suggests recognition of the host female sex pheromone as a kairomone. Male P. viburni were found in all 11 Hawke’s Bay orchards where traps were operated and one of three orchards in Nelson. Traps also recovered P. maculipennis from eight of these Hawke’s Bay orchards and one Nelson orchard. The finding of kairomonal activity in the parasitoid has simplified monitoring to determine the post-introduction establishment of this biological control agent. The phenology of the two species evident in the traps found a mealybug generation without evident parasitoid catch in the middle of the winter. Future applications of mealybug sex pheromones for managing the pest and parasitoid are presented.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

Trapping obscure mealybug (<i>Pseudococcus viburni</i>) and its natural enemy <i>Pseudaphycus maculipennis</i> (Hymenoptera Encyrtidae) in apple orchards

Trapping obscure mealybug (Pseudococcus viburni) and its natural enemy Pseudaphycus maculipennis (Hymenoptera Encyrtidae) in apple orchards