Author: Walter E. ColePublisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 16
Book Description
Study Plan for a Spruce Budworm Population Damage Study in Southern Idaho
Author: Walter E. ColePublisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 16
Book Description
A Comparison of Spruce Budworm Population Estimates Between Southern Idaho and Eastern Oregon
Author: Walter E. ColePublisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 4
Book Description
General Technical Report PSW.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 334
Book Description
Integrating Fire Management Analysis Into Land Management Planning
Author: Thomas John MillsPublisher:
ISBN:
Category : Forest fires
Languages : en
Pages : 676
Book Description
Guide to Testing Insecticides on Coniferous Forest Defoliators
Author: Carroll B. WilliamsPublisher:
ISBN:
Category : Conifers
Languages : en
Pages : 44
Book Description
Het rapport bevat richtlijnen voor onderzoek van insekticidentoediening in naaldbossen. In het Westen van de Verenigde Staten worden naaldbossen periodiek geinfecteerd met epidemische populaties van insekten die de bomen van hun naalden ontdoen. Ofschoon deze gids primair gebaseerd is op onderzoeken van populaties van naaldboomrupsen kan veel van de weergegeven informatie gebruikt worden voor andere insekten die de bomen van hun bladeren of naalde ontdoen
Spruce Budworm Population Damage Study
Author: Walter E. ColePublisher:
ISBN:
Category : Abies lasiocarpa
Languages : en
Pages : 23
Book Description
A Comparison of Spruce Budworm Population Estimates Between Southern Idaho and Eastern Oregon
Author: Walter E. ColePublisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 0
Book Description
Plan for the Technical Direction of the 1955 Spruce Budworm Control Project in Southern Idaho
Author: Malcolm M. FurnissPublisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 24
Book Description
An Appraisal Survey of Spruce Budworm Damage on Parts of the Boise and Payette National Forests in Southern Idaho, November, 1954
Author: Malcolm M. FurnissPublisher:
ISBN:
Category : Forest surveys
Languages : en
Pages : 26
Book Description
Computer Simulation for Integrated Pest Management of Spruce Budworms
Author: Carroll B. WilliamsPublisher:
ISBN:
Category : Pests
Languages : en
Pages : 16
Book Description
Some field studies of the effects of various insecticides on the spruce budworm (Choristoneura sp.) and their parasites have shown severe suppression of host (budworm) populations and increased parasitism after treatment. Computer simulation using hypothetical models of spruce budworm-parasite systems based on these field data revealed that (1) effective parasites produce greater stability in budworm populations than ineffective ones and are more resistant to changes induced by insecticides; and (2) the level of budworm population suppression in most budworm·parasite systems is not proportional to the amount of insecticide applied. Only high insecticide dosages produce any effect on the budworm population. Cost-benefit analyses showed that very high investments are worthwhile, but moderate investments produce little effect. The study demonstrated that the computer simulation pmcess helps to define kinds of information needed for understanding the budworm-parasite system, and can predict system behavior under varying conditions.