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Seasonal Occurrence of Adult Potato Leafhopper, Empoasca fabae (Homoptera: Cicadellidae), on Alfalfa in Kentucky

J. C. Parr and B. C. Pass
Journal of the Kansas Entomological Society
Vol. 62, No. 4 (Oct., 1989), pp. 593-596
Stable URL: http://www.jstor.org/stable/25085138
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Seasonal Occurrence of Adult Potato Leafhopper, Empoasca fabae (Homoptera: Cicadellidae), on Alfalfa in Kentucky
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Abstract

During a 4-year study in Fayette County, the first collections of adult potato leafhoppers from mature alfalfa occurred on May 4, 1981, May 7, 1982, May 31, 1984, and May 10, 1985. Populations peaked in early July and averaged 4.9 and 2.2 adults per sweep in spring-seeded (first year) and mature stands, respectively. The sex ratio (F:M) of the early migrants in May and early June ran as high as 4.8:1. Populations in all study fields collapsed after harvest in July and never exceeded 1.1 adults per sweep throughout the remainder of the season.

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