The probing behavior of M. persicae (Sulzer) on a resistant and a susceptible sugar beet hybrid was studied by means of an electronic recording system and compared with its natural probing behavior on a favored host plant. Significant differences of several compared parameters were revealed which could explain resistance and susceptibility in these beet hybrids. The term "resistance to virus transmission" is proposed for the type of resistance which is due to vector probing behavior, and a "relative resistance index" (RRI) is suggested for its measurement. With this method, the RRI of individual resistant plants was measured, and it was found that further improvement of resistance would be possible in the resistant hybrid by means of further selection.
Document Type: Research Article
Publication date: February 1, 1974
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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.