PREVENTION OF INSECT-CAUSED SEED LOSS IN DOUGLAS-FIR WITH SYSTEMIC INSECTICIDES
- 1 March 1966
- journal article
- research article
- Published by Canadian Institute of Forestry in The Forestry Chronicle
- Vol. 42 (1) , 76-82
- https://doi.org/10.5558/tfc42076-1
Abstract
Cone-bearing Douglas-fir trees in three localities on Vancouver Island were sprayed with the systemic insecticides Bidrin (0.35 and 0. 75%), dimethoate, Sumithion, Meta-Systox-R, and SD 9129 (1.0 and 2.0%) when cones had reached the pendent stage of development. With the exception of Sumithion, all material gave varying degrees of control over important insect pest of cones in this area, i.e. the gall midge, Contarinia oregonensis Foote, the cone moth, Barbara colfaxiana (Kft.), the seed chalcid, Megastigmus spermotrophus Wachtl, and the scale midge, C. washingtonensis Johnson.This publication has 1 reference indexed in Scilit:
- Insecticides Tested for Control of the Douglas-Fir Cone MidgeJournal of Economic Entomology, 1963