protecting trees from 

 defoliation. 6 



Much research also has 

 been conducted on ways 

 of protecting wood products 

 from subterranean termites 

 and other wood-destroying 

 insects and fungi. In the 

 late 1930's, T.E. Snyder 

 initiated work on termites, 

 and M.B. Christian sought 

 ways of controlling powder- 

 post beetles in hardwood 

 lumber. Starting in the 

 1940's, H.R. Johnson and 

 coworkers identified pesti- 

 cides and procedures for 

 protecting wood in houses 



6 The great variety and importance 

 of forest insect pests have been 

 described in "Eastern Forest In- 

 sects" by Whiteford Baker (1972). 

 In 1985 the Forest Service pub- 

 lished an update of this book, 

 "Insects of Eastern Forests," 

 Miscellaneous Publication 1426. 



and other structures from 

 attack by termites and other 

 insects. Related research 

 developed ways of protect- 

 ing wood structures from 

 decay associated with rain 

 seepage and condensation 

 in air-cooled buildings by 

 use of nonpressure preserv- 

 ative treatment (Verrall 

 1982). 



Results of these studies, 

 together with work on wood 

 preservatives at such loca- 

 tions as the Forest Products 

 Laboratory at Madison, Wl, 

 and Mississippi State Uni- 

 versity, have benefited 

 consumers through greatly 

 improved performance of 

 wood in many uses. Federal 

 Housing Administration 

 standards, for example, 

 and military manuals for 

 prevention of insect and 

 disease attack in structures 

 are based on findings of 

 this research. 



39 



