Larval Densities and Trends of Insect Species Associated With Spruce Budworms in Buds and Shoots in Oregon and Washington - Carlin, V. M.; United States. Department of Agriculture. Forest Service (Washington, D.C. : United States Government Printing Office, 1980)
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Research Paper PNW-273
Keywords: Lepidoptera -- Control -- Congresses -- United States; Heliothis -- agricultural pests -- United States