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A mixture of phenolphthalein and arsenate of lead was dusted on tobacco. A print of the leaves was taken on filter paper impregnated with an aqueous solution of sodium hydrate. How thoroughly an insecticide distributes through a plant under varying conditions of application has long been a matter of guess work or determinable only by the slow and laborious methods of analysis. The present method offers an easy and immediate determination to the entomologist and layman who may not have available the services of a chemist. The method is applicable to all dusts of whatever character and also to sprays.
Document Type: Research Article
Publication date: April 1, 1925
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.