Distribution of the cone insect, Dioryctria disclusa, in red pine.

William J. Mattson Jr.

Treesearch

Distribution of the cone insect, Dioryctria disclusa, in red pine.

Informally Refereed

Authors:

William J. Mattson, Jr.

Year:

1976

Type:

Research Paper

Station:

Northern Research Station

Source:

Research Paper NC-136. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station

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Download (PDF 1.33 MB): https://research.fs.usda.gov/download/treesearch/10657.pdf

Abstract

Within the crowns of red pine, Pinus resinosa Ait., trees, larvae of the cone insect, Dioryctria disclusa Heinrich, tended to follow the distributions of their foods. Between-tree distributions of larvae, however, were relatable to food distributions in only two of five years. Cone damage/tree by D. disclusa increased linearly with cone abundance per tree when insect populations were large relative to cones. Percentage cone damage/tree was not significantly correlated with cone abundance.

Keywords

negative binomial, sampling, cone damage, male strobili, model

Citation

Mattson, William J. 1976. Distribution of the cone insect, Dioryctria disclusa, in red pine. Research Paper NC-136. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station