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Controlling Yellowjackets In Urban Recreational Areas

Outdoor areas were monitored for two pestiferous species of yellowjackets, Vespula alascensis Packard and Vespula pensylvanica Saussure (Hymenoptera: Vespidae), in southern and northern California. Heptyl butyrate attracted V. acadica (Sladen), V. alascensis, V. atropilosa (Sladen), and V. pensylvan...