Gas exchange measurements were made upon sections of potato leaflet tissue which were damaged by feeding of the potato leafhopper, Empoasca fabae (Harris). Increases in respiration, accompanied by reductions in both apparent and true photosynthesis, were usually noted at the ends of the feeding periods. The photosynthetic depressions were quantitatively related to lengths of the feeding periods and the developmental stages of the insects. Although insect-induced changes in the rates of both respiration and apparent photosynthesis were most pronounced immediately after the feeding periods and declined thereafter, the reductions in true photosynthesis seemed to be permanently effected. Such reductions became distinctly pronounced as light intensities approached 2200 ft-c.
Document Type: Research Article
Publication date: August 1, 1965
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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.