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

Item 83-B.

Bibliography: p. 6-7.