INFESTATION RATINGS OF THE LARCH SAWFLY IN MANITOBA AND SASKATCHEWAN
- 1 September 1960
- journal article
- Published by Canadian Institute of Forestry in The Forestry Chronicle
- Vol. 36 (3), 225-229
- https://doi.org/10.5558/tfc36225-3
Abstract
Larch sawfly infestations are commonly surveyed from the ground and air. Ground surveys are based on estimates of defoliation and proportion of tamarack shoots utilized for oviposition. Aerial surveys are based on colour ratings discernible at an altitude of 600 feet. The proportional distribution of shoots and foliage of tamarack was studied and found to be similar for four different crown types. The paper attempts to rate infestations so that either ground or aerial surveys will give comparable results.Keywords
This publication has 2 references indexed in Scilit:
- Ecological Life-History of the Larch Sawfly, Pristiphora erichsonii (Htg.) (Hymenoptera: Tenthredinidae), in Manitoba and SaskatchewanThe Canadian Entomologist, 1960
- A Technique for Estimating Tamarack Foliage Production, A Basis for Detailed Population Studies of the Larch SawflyThe Canadian Entomologist, 1959