Distribution of the cone insect, Dioryctria disculsa, in red pine trees
By: William J. Mattson
Contributors: United States. Northeastern Forest Experiment Station, Upper Darby Pa; United States. Forest Service
Series: USDA Forest Service research paper NC ; 136; USDA Forest Service research paper NC -- 136
Publisher: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Published: 1976
Place of publication: [St. Paul]
Language: eng
Subjects: Insects -- Minnesota -- Geographical distrubution; Red pine -- Diseases and pests -- Minnesota
Notes: Cover title

Bibliography: p. 6-7