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Commercial corn fields were surveyed in northern Tamaulipas, Mexico, during the spring and fall growing seasons of 1985 and 1986 to assess the damage and yield losses caused by the stalkborers, Diatraea lineolata (Walker), D. saccharalis (F.), and Eoreuma loftini (Dyar). Tunneling by E. loftini was characteristically different from that of Diatraea spp. Diatraea spp. occurred more frequently in the lower internodes during the fall than during the spring, which is probably related to the overwintering habits of the species. D. lineolata was more abundant than D. saccharalis during all seasons.E. loftini was the most common species during the fall and it was scarce during the spring. The simultaneous occurrence of both genera within the same plant was a random process. Significant correlations were found between the number of borer larvae, percentage of internodes damaged, and percentage of plants damaged. Damage and yield losses were greater in the fall when the borer populations were denser. Yield reductions per field averaged 1.3, 17.0,and 2.0%during spring of 1985, fall of 1985, and spring of 1986, respectively. A maximum of 39.3% of yield loss was detected in one field in the fall of 1985.
Document Type: Research Article
Publication date: December 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.