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Various behavioral and physiological responses involved in establishment of a planthopper, Sogatella furcifera (Horváth), on rice cultivars with diverse resistance genes were investigated. The cultivars tested were resistant ‘Muskhan 41’ (Wbph 1), ‘N22’ (Wbph 1), ‘N32’ (Wbph 1), ‘ARC 10239’ (Wbph 2), ‘ADR 52’ (Wbph 3), ‘Podiwi A8’ (Wbph 4), ‘wc 1240’ (Wbph 1 + 1 recessive ?), ‘Colombo’ (Wbph 2 + 1 recessive ?), ‘IR2035-117-3’ (Wbph 1 + Wbph 2), and the susceptible ‘Taichung Native l’ (TN1) (no resistance gene). In a free-choice test, the orientational response of S. furcifera females due to visual attraction was identical on resistant and susceptible cultivars, but after 8 h, significantly more individuals settled on susceptible TNI plants than on resistant ones. The quantity of food ingested and assimilated by S. furcifera on resistant cultivars was significantly less than on susceptible TN1;. The suitability of TN1 plants for S. furcifera growth was highest among all test cultivars. A significant reduction in adult survival and fecundity, egg hatchability, and population increase was observed on resistant plants compared with susceptible TN1; however, oviposition was not affected. A comparison of the relative intensity of S. furcifera responses toward different resistant cultivars revealed that ‘IR2035-117-3’ was least suitable for the insect's establishment, whereas ‘Podiwi A8’ had the lowest level of resistance.
Document Type: Research Article
Publication date: December 1, 1985
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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.