Forest Pests Documents

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Documentation of Red Spruce Growth Decline

Goal(s)/Objective(s): A study to determine whether red spruce is declining in growth over much of its geographic range and if so, when the decline may have begun
Key Findings: The decline in growth of red spruce previously reported only for isolated locations is occurring throughout a sizable portion of the geographic region.
Views: 1238
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Effect of Pesticides on Cholinesterase from Aquatic Species: Crayfish, Trout and Fiddler Crab

Problem Addressed: Use of pesticides and the development of quantitative assays for low concentrations of these pesticides
Key Findings: Nineteen pesticides were tested for inhibition of cholinesterase activity derived from trout brain, crayfish nervous system and whole fiddler crabs. Inhibition by low concentrations of a few of these pesticides permitted a very sensitive and selective assay. Chlorinated pesticides as a class showed little inhibitory effect on trout and crab cholinesterase. Carbamates strongly inhibit all three enzymes.
Views: 1080
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Environmental Impact Studies of Spruce Budworm (Choristoneura Fumiferana Clemens) Control Programs in New Brunswick in 1976

Problem Addressed: Untoward effects to non-target organisms of the forest ecosystem increases as new products, dosage rates and pesticide combinations are introduced into the spray regime.
Goal(s)/Objective(s): Presents the results of studies carried out in New Brunswick to determine immediate effects and short-term impact of a series of trials employing several chemical insecticides at varying dosage rates upon breeding bird and small mammal populations and benthic organisms in treated streams
Key Findings: Aminocarb employed as an adulticide had no significant effects on bird or aquatic insect populations
Views: 949
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Pesticides in Forest Waters-Symptom of a Growing Problem

Problem Addressed: Pesticides in waters
Key Findings: We must become aware of the growing possibility of widespread contamination of the forest environment by a broad array of chemicals
Views: 991
Downloads: 0
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