Injury by stalk borer, Papaipema nebris (Guenée), to two- to four-leaf stage field corn, Zea mays (L.), was studied to characterize plant damage and subsequent yield loss. Damage was categorized as uninfected (no damage), leaf-feeding, or dead heart (whorl death). Tissue yields of stalk, grain, and cob, and total dry weights were monitored. Yields of plants sustaining leaf-feeding damage alone were not significantly different from yields of uninfected plants. Plants with dead-heart damage, however, had significantly reduced yields compared to other plants for all yield parameters except stalk dry weight. In addition, plants experiencing dead-heart damage often were either barren or produced ears containing scattered kernels of grain, similar to corn plants having incomplete pollination. In the absence of mortality, yield compensation by healthy plants growing near damaged plants was not observed.
Document Type: Research Article
Publication date: February 1, 1986
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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.