Hoff, R. J. 1988. Resistance of ponderosa pine to the gouty pitch midge {Cecidomyia 

 piniinopis). Res. Pap. INT-387. Ogden, UT: U.S. Department of Agriculture, Forest 

 Service, Intermountain Research Station. 3 p. 



Individuals of a family test of ponderosa pine were scored for the amount of damage 

 caused by infestation by gouty pitch midge. The percentage of dead or dying tips varied 

 from to 57 percent for individuals, and to 20 percent for families. Heritability based 

 on individuals was 0.48 and for family 0.60. The amount of gain in resistance and use of 

 these data in tree improvement programs are discussed. 



KEYWORDS: forest genetics, forest pathology, insect resistance, silviculture, 

 reforestation 



