Vertical Distribution of Mexican Rice Borer (Lepidoptera: Pyralidae) Larvae and Tunnels in Lower Rio Grande Valley Sugarcane

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Vertical distribution patterns of Mexican rice borer, Eoreuma loftini (Dyar), larvae and tunnels in Lower Rio Grande Valley sugarcane, Saccharum spp., were examined by stalk dissections in commercial sugarcane from late May until early September (1992) or mid-October (1993). Larval age distributions were fairly stable throughout the sampling periods, with small larvae consistently comprising a substantial portion of the larval population infesting millable stalks. Meaningful differences in the vertical distributions of small, medium, and large larvae were not detected. Contrary to earlier reports, most larvae and tunnels were located in the lower, more productive internodes regardless of the degree of stalk development. These results do not support the concept of age-specific internode susceptibility to Mexican rice borer attack, and stress the need to consider season-long population suppression in the development of strategies to manage the Mexican rice borer in sugarcane.

Keywords: Eoreuma loftini; Saccharum spp; vertical distribution

Document Type: Research Article

Publication date: August 1, 1999

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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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