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Effect of Nitrogen Levels on Rice Water Weevil Populations

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A test was conducted in 1959 to investigate the effects of nitrogen levels on rice water weevil, Lissorhoptrus oryzophilus (Kuschel), larval populations and the resulting yields of rice. Data recorded on the number and total length of adult feeding scars indicated no significant difference between rates of 0, 40. 80, and 120 lb. of nitrogen per acre or between untreated plots and plots treated to control rice water weevil larvae. Data on larval populations showed an increase with each increase in rate of nitrogen and differences between treated and untreated plots. The yield data showed differences among all rates of nitrogen and between treated and untreated plots. The yield increases were approximately linear with each increase in rate of nitrogen in both the treated and untreated plots.

Document Type: Research Article

Publication date: December 1, 1963

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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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