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Austin State College beetle attack beetles of North benzene hexachloride black turpentine beetle Canad Coyne defoliation diseases of South Econ enemies of southern Experiment Station Forest factors Forest Experiment Station Forest Expt Forest insects Forest Pest Reporter Forestry Comn Forestry Stephen fungi history and habits Host trees illus Important insect enemies infested insects and diseases Ips activity Ips engraver beetles Jour larva Loblolly Pine mountain pine beetle Nantucket pine tip nature of injury North Carolina outbreaks percent phloem Pine bark beetles pine tip moth ponderosa pine prevention and control preventive and remedial rainfall deficiency red-headed pine sawfly References Of Value Research Forester S. C. State Forestry Shawnee State Forest shortleaf pine signs of attack South Carolina trees Southern Forest Experiment Southern Forest Pest southern pine beetle species Station Forest Service Stephen F Texas Forest Service timber losses U. S. Dept U. S. Forest Serv white fir