Abstract
Abstract. Beneficial insects (predators, parasitoids, pollinators) associated with stinging nettles, Urtica dioica Linnaeus (Urticaceae), were sampled at three sites in central Washington during spring-summer 2011–2013 using transparent sticky traps attached to upper portions of plants. Large numbers (200–400/trap) of beneficial insects were trapped particularly in June and early July, gradually decreasing thereafter. Phytophagous insects (aphids and leafhoppers) were trapped in much lower numbers ( 95% of predatory bugs, peaking in abundance in June or July. Predacious flies were dominated by species of Empididae and Dolichopodidae. Native ...
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