Author: Carroll B. Williams
Publisher:
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.
Computer Simulation for Integrated Pest Management of Spruce Budworms
Author: Carroll B. Williams
Publisher:
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.
Publisher:
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.
Programs for computer simulation of a crosscut-first furniture rough mill
Integrated Pest Management Guide
Author: James P. Linnane
Publisher:
ISBN:
Category : Trees
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Trees
Languages : en
Pages : 28
Book Description
Principles of Spruce Budworm Integrated Pest Management [electronic Resource]
Author: Canada. Health Canada
Publisher:
ISBN: 9780662363613
Category :
Languages : en
Pages : 26
Book Description
Publisher:
ISBN: 9780662363613
Category :
Languages : en
Pages : 26
Book Description
Spruce Budworms Handbook
Author: Daniel M. Schmitt
Publisher:
ISBN:
Category : Insect pests
Languages : en
Pages : 204
Book Description
Publisher:
ISBN:
Category : Insect pests
Languages : en
Pages : 204
Book Description
Integrated Pest Management, August 1980-August 1983
Author: Jayne T. MacLean
Publisher:
ISBN:
Category : Insecticide resistance
Languages : en
Pages : 48
Book Description
Publisher:
ISBN:
Category : Insecticide resistance
Languages : en
Pages : 48
Book Description
Spruce Budworm Cooperative Management, 1981-1985
Development of an integrated pest management system for the western spruce budworm
The Western Spruce Budworm Dynamics Model
Author: Nicholas L. Crookston
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 28
Book Description