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The Effect of Various Adjuvants on the Systemic Insecticidal Activity of Phorate and Zectran

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Abstract:

Eighty-seven adjuvants were screened for their influence on the systemic insecticidal activity of phorate and ZeetranĀ®, 4-dimcthylaminino-3,5-xylyl methylcarbamate. The insecticides, at 100 ppm, and the adjuvants, at 50 ppm, were added to plant nutrient solutions in which cotton seedlings were placed. Boll weevils, Anthonomus grandis Boheman, were confined on the plants for 48 hr. The mortality of boll weevils plants in insecticide plus adjuvant was compared with that on plants exposed to Zectran alone, None of the adjuvants affected the activity of phorate; however, 3 significantly enhanced the systemic activity of Zectran. All 3 were quaternary ammonium chlorides and the only chemicals of this type included in the tests. No synergistic effect was involved and the adjuvants were either affecting the roots or the insecticide in such a manner that the insecticidal activity of Zectran was increased.

Document Type: Research Article

Publication date: June 1, 1964

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  • 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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