Evaluation of Crop Rotation for Control of Colorado Potato Beetles (Coleoptera: Chrysomelidae) in Commercial Potato Fields on Long Island

Author: Wright, Robert J.

Source: Journal of Economic Entomology, Volume 77, Number 5, October 1984 , pp. 1254-1259(6)

Publisher: Entomological Society of America

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Leptinotarsa decemlineata (Say) densities, potato defoliation levels, and grower insecticide use were monitored in commercial potato fields with differing rotational histories on Long Island, New York. Rotation for 1 year to a nonhost grain crop (rye or wheat) significantly reduced the pest status of L. decemlineata in the following year's potato crop. Early season (late May) adult densities were reduced 95.8% in three of four comparisons in 1982 and 69.5% in two of three comparisons in 1983. In one comparison each year, early season L. decemitneata densities were low in both the rotated and nonrotated fields due to past grower practices. Season-long (June-August) paired comparisons of rotated and non-rotated fields were conducted on four farms in 1982 and five farms in 1983. In these comparisons, growers used an average of one (range, 0–2) additional insecticide application for L. decemlineata control during the first generation on the nonrotated fields. Despite this, defoliation levels and L. decemlineata densities were higher in several cases in the nonrotated fields. The effect of crop rotation was greatest early in the season and was not detectable after the end of the first L. decemlineata larval generation on Long Island.

Document Type: Research Article

Publication date: October 1, 1984

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.
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