Age and Susceptibility of Nymphal Lone Star Ticks1 to Selected Ixodicides2,3

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Over a 2l-week period, susceptibility of starved nymphal Amblyomma americanum (L.) increased 13,000. fold to DDT, l60-fold to malathion, l50-fold to dioxathion, and only 10-fold to carbaryl. However, when pretreatment holding conditions included a cycling temperature (21 for 12 hr dark, 27 for 12 hr light), susceptibility increased less rapidly than when they were held at 27. Change in susceptibility takes place within such a short period that field-collected nymphs (precise age and environmental situation unknown prior to collection) cannot be used to measure resistance.

Document Type: Research Article

Publication date: February 1, 1972

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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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