Acylsugars of Lycopersicon pennellii Deter Settling and Feeding of the Green Peach Aphid (Homoptera: Aphididae)

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Abstract:

Feeding behavior of the green peach aphid, Myzus persicae (Sulzer), differed on Lycopersicon pennelli (Corell) D' Arcy (LA 716) and 'VFT Vendor' tomato (L. esculentum [Mill.]). Fewer aphids initiated feeding on L. pennellii (LA 716), and time to first probe was significantly greater. Also, percentage of time spent probing and number of probes were less on this accession of L. pennellii. Time to first probe was significantly greater, while percentage of time spent probing and number of probes were less on L. pennellii (LA 716) than on L. penllellii (LA 1912), an accession that lacks acylsugar production. There were no significant differences between the behavior of the aphids on L. pellnellii (LA 1912) and L. esculentum for time to first probe or percentage of time spent probing. The effect of acylsugars obtained from L. pennellii (LA 716) on settling of M. persicae was determined by feeding-cage experiments. In choice tests, the proportion of aphids that settled on a treated port was a decreasing function of application level of acylsugars, with a maximal effect at application levels of 50 mg acylsugars per square centimeter and greater.

Document Type: Research Article

Publication date: February 1, 1993

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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