Determining the Effectiveness of Dormant Treatments Against the San Jose Scale

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Attention is called to the fact that a count of the first-generation San Jose scales, A spidiotus perniciosus Cornst., settling on the new wood furnishes a reliable index of the effect of the dormant treatment and also a check on the accuracy of the count of dead and living scales. A very pronounced negative correlation is shown between the per cent of dead scales and the average number of young scales per inch of new wood. This correlation is considered to indicate that in the experiments reported, the counts made 30 days after the application of the dormant spray gave reliable results.

Document Type: Research Article

Publication date: December 1, 1926

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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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