Estimation of Cocoon Populations of the Larch Sawfly, Pristiphora erichsonii (Hartig)
- 1 October 1959
- journal article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 91 (10), 650-661
- https://doi.org/10.4039/ent91650-10
Abstract
This paper is one in a series on techniques used in estimating populations of various stages of the larch sawfly (Ives, 1955b; Ives and Prentice, 1958). This insect spends most of the year in cocoons in the soil beneath the host tree. The objective of accurate estimation of the cocoon population is to provide a basis for the evaluation of mortality factors affecting this stage. Two methods of estimation are considered in this paper. One is based on soil sampling (Part I) and the other on the number of cocoons formed in traps for falling larvae (Part 11).Keywords
This publication has 5 references indexed in Scilit:
- A Sequential Sampling Technique for Surveys of the Larch SawflyThe Canadian Entomologist, 1958
- AN INSTRUMENT FOR MEASURING THE RADII OF TREE CROWNSThe Forestry Chronicle, 1957
- Population Studies on Small Mammals of Southeastern ManitobaJournal of Mammalogy, 1957
- ESTIMATION OF EGG POPULATIONS OF THE LARCH SAWFLY, PRISTIPHORA ERICHSONII (HTG.)Canadian Journal of Zoology, 1955
- Effect of Moisture on the Selection of Cocooning Sites by the Larch Sawfly, Pristiphora erichsonii (Hartig)The Canadian Entomologist, 1955