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An experiment was conducted during 2 yr to develop a rapid and reproducible method of screening melon, Cucumis melo L., germplasm for resistance to Bemisia argentifolii Bellows & Perring. Multiple tests were conducted on plant response and response by insect for 31 selected melon entries when exposed to B. argentifolii in an open-choice greenhouse test for 2 wk. Frequency distributions of susceptible and resistant entries and their F1, F2, and backcross families indicated genetic variation for resistance. Whitefly immature density, plant condition, and change in whole plant biomass were good indicators of plant resistance. Data for root, stem, and leaf biomass, stem length, and plant moisture were inconsistent. Resistance plants had lower whitefly density, were in better condition, and sustained less reduction in size and biomass as compared with susceptible plants. This method allows the testing of germplasm and segregating populations throughout the year rather than in one portion of the year as has been done in the field.
Document Type: Research Article
Publication date: December 1, 1996
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.