Insect Predators1 for Controlling Aphids2 on Potatoes. 1. In Small Plots3

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In northeastern Maine, from 30 to 56% all-season control of the aphid population on potatoes in small plots was obtained by manually placing small numbers of eggs or newly hatched larvae of Coccneilla septempunctaia L., or of eggs of Chrysopa spp. on the plants during several weeks in early summer. Although differences between treated and untreated plots for total aphid infestation were significant over a 3-week period, lack of many significant differences among the predator treatments may have been due in part to interplot movement of the introduced predators. The placement of chrysopid eggs in the plots resulted in better control of the green peach aphid, Myxus persicae (Sulzer), than of the potato aphid, Macrosiphum euphorbiae (Thomas). The reverse occurred from that of eggs or larvae of the coccinellid. Protein hydrolysate spray exerted no appreciable effect upon populations of aphids, coccinellids, or of chrysopid larvae on treated plants.

Document Type: Research Article

Publication date: April 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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