RESIN CRYSTALLIZATION RELATED TO WEEVIL RESISTANCE IN WHITE PINE (PINUS STROBUS)
- 1 February 1972
- journal article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 104 (2) , 215-219
- https://doi.org/10.4039/ent104215-2
Abstract
Differences in weevil attack between trees containing crystallizing and non-crystallizing resin were observed. Among twenty non-crystallizers only three trees were successfully attacked by the white-pine weevil. About 50% of the remaining population was successfully attacked. Resin crystallization can thus be used as a characteristic to screen for resistance to the white-pine weevil.Since several other characteristics such as leader diameter, depth of cortical resin ducts and bark thickness are also related to weevil resistance, a discriminant function could be developed to maximize discrimination between susceptible and resistant trees by a properly weighted combination of characteristics related to weevil resistance.Keywords
This publication has 1 reference indexed in Scilit:
- Table for Both the Sign Test and Distribution-Free Confidence Intervals of the Median for Sample Sizes to 1,000Journal of the American Statistical Association, 1964