Spring Larval Dispersal of the Western Spruce Budworm (Lepidoptera: Tortricidae) in North-Central Washington 1
- 1 August 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Environmental Entomology
- Vol. 11 (4) , 828-832
- https://doi.org/10.1093/ee/11.4.828
Abstract
Vertical distribution of spring dispersal activity within a stand canopy was determined by trap catch at 2-day intervals. The 10-m traps consistently caught more larvae than the 6-, 2-, and 0.5-m traps except during inclement weather. A partial explanation is the filtering effect of adjacent tree crowns on the dispersing larvae before they reach the lower traps. Most larvae caught by the 2- and O.5-m traps would be lost to the system. Dispersal of 3rd and 4th instars represented about 38% of the total trap catch, indicating greater off-tree dispersal than normally expected for these instars. An explanation based on asynchrony of host and budworm is suggested.This publication has 4 references indexed in Scilit:
- Dispersal of Early Instars of the Douglas-fir Tussock Moth1,2,3Annals of the Entomological Society of America, 1979
- Relation of Spruce Budworm Development and Balsam Fir Shoot Growth to Heat Units1Journal of Economic Entomology, 1968
- Hibernation Site and Dispersal of Spruce Budworm Larvae as Related to Damage of Sapling Balsam FirJournal of Economic Entomology, 1968
- Site of Spruce Budworm Egg Masses on their Preferred Hosts in the Lake StatesJournal of Economic Entomology, 1963