Toxicity of Zectran to Western Spruce Budworm as a Function of Application Site

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The place of application of an insecticide to an insect affects toxicity (Fisher 1952). In our study of the toxicity of Zectran® (4-dimethylamino-3,5-xylyl methylcarbamate), several formulations were tested for their effects on the western spruce budworm, Choristoneura occidentalisFreeman. One of the formulations was a water-soluble salt of Zectran (Zectran hydrochloride). We noted that discrete droplets could be formed and applied at any point on the bud worm larva. Acetone solutions of Zectran do not remain at the point of application, but they spread out over several segments. The ability of the water-soluble formulation to remain at the site of application was used to investigate the effect of application site on mortality.

Document Type: Research Article

Publication date: October 15, 1971

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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