Environmental Entomology (1986) 15, 547-554

William P. Kemp, Brian Dennis and Roy C. Beckwith (1986)
Stochastic phenology model for the western spruce budworm (Lepidoptera: Tortricidae)
Environmental Entomology 15 (3), 547-554
Abstract: Data were collected during 2 consecutive years on the Starkey Experimental Forest near La Grande, Oreg., to examine phenology of the western spruce budworm, Choristoneura occidentalis Freeman. The logistic probability distribution was used. to describe distribution of budworm in each developmental stage (instar 2 through adult) as a function of accumulated degree-days by year, plot, and host species. The logistic distribution described phenology accurately and was simpler to compute than other methods. Results should interest insect-pest managers and researchers who model development of plants and animals.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Choristoneura freemani	Fir (Abies)	U.S.A. (NW)
	Choristoneura freemani	Douglas fir (Pseudotsuga menziesii)	U.S.A. (NW)