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Changes in nonstructural carbohydrate (NSC) levels in seedling sorghum, Sorghum bicolor (L.) Moench, caused by the feeding of green bug, Schizaphis graminum (Rondani), were examined. Plants were grown hydroponically in Hoagland's solution at 25°C for 14 d, then subjected to a 7-d greenbug infestation maintained at 15 aphids per plant. Nonstructural carbohydrates were extracted with water from root and shoot samples of seedlings and analyzed by high-performance liquid chromatography. Greenbug feeding significantly reduced plant growth. Greenbug honeydew represented a major loss to the plant and accounted for 18 ± 4.7% (mean ±SE, n = 4) of the dry weight loss of the infested plants. Concentrations (dry weight basis) of glucose and starch in the shoots and sucrose in the roots tended to be higher in infested than uninfested plants. However, total nonstructural carbohydrates concentrations in roots and shoots clearly were not significantly different between infested and uninfested seedlings.
Document Type: Research Article
Publication date: April 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.