Two strains of two-spotted spider mite (Tetranychus telarius (L.)), widely different. in susceptibility to organophosphorus acaricides, produced more progeny on lima bean plants as nitrogen supply and absorption were increased, However, in studies with resistant mites, a reduction in the number of progeny occurred on plants supplied the highest nitrogen level. The resistant mites produced more progeny on plants supplied high potassium levels, and the nonresistant mites on plants supplied high phosphorus levels. Increases in the number of progeny produced by either strain were correlated with the carbohydrate content of the leaf tissue. when carbohydrate was increased, with a corresponding increase in nitrogen supply and absorption, mites produced more progeny. At certain higher level of nitrogen supply and absorption, however, carbohydrate content of leaf tissue decreased and mites produced fewer progeny or failed to produce more progeny even though nitrogen absorption of the plant increased. Phosphorus and potassium supply alone and in combination with certain levels of nitrogen supply affected nitrogen absorption and total carbohydrate content of the leaf tissue.
Document Type: Research Article
Publication date: February 1, 1962
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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.