Pubescence in Sugarcane as a Plant Resistance Character Affecting Oviposition and Mobility by the Sugarcane Borer (Lepidoptera: Pyralidae)

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Pubescence in sugarcane, Saccharum robustum, adversely affected oviposition and larval movement by the sugarcane borer, Diatraea saccharalis (F.), in tests conducted with clones 'NG 77-147' (pubescent) and 'NG 77-195' (glabrous). In a no-choice test, significantly fewer eggs were laid on potted plants of the pubescent clone, which also received fewer eggs, egg masses, and eggs per egg mass on abaxial and adaxial leaf surfaces. Ovipositional activity on sheaths, stems, and surrounding soil of potted pubescent plants was higher than on potted glabrous plants. In a free-choice test, significantly more egg masses were laid on pubescent excised leaves than on glabrous leaves. No significant differences in the number of eggs and number of eggs per egg mass were observed between pubescent and glabrous excised leaves in either free-choice or no-choice tests. However, for all tests conducted, more eggs were laid on the adaxial leaf surface of the glabrous clone than on any other surface. Numbers of eggs per egg mass were less on the abaxial and adaxial leaf surfaces of the pubescent clone, while they were greatest on the midrib of the glabrous clone. Number of eggs, egg masses, and eggs per egg mass were higher on the midrib surface of the pubescent clone (midrib devoid of trichomes) than in the glabrous clone. Mobility of first instar surgarcane borers was also impaired by pubescence.

Document Type: Research Article

Publication date: April 1, 1988

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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.
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