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Water management (removal of water to alter the habitat necessary for larval survival) is a pest management tactic that might have potential as a substitute for the use of insecticides to control the rice water weevil, Lissorhoptrus oryzophilus Kuschel, effectively on rice, Oryza sativa L. Field research was conducted during 1989 and 1990 to compare the use of water management and carbofuran as rice water weevil control tactics and to assess subsequent impact on rice yield components. These data were used to determine the economic analysis of costs and net returns of carbofuran use relative to the use of water management as a potential substitute for control of the rice water weevil. Rice water weevil larval populations in water management and carbofuran treatments were lower than populations in the untreated check during critical vegetative plant growth periods both years. The delayed water management treatment and the continuous /lood with two applications of carbofuran treatment provided more effective late-season control than the other treatments. Plant heights and yield components in the water management treatments were greater than the untreated check. The water management treatments had higher grain yield and grain/straw ratio than the other treatments. The water management treatments on a per-hectare basis resulted in the highest yield in both years and highest net returns in 1989, followed by the carbofuran treatments. The data indicated that water management has potential as an economical pest management tool for control of the rice water weevil.
Document Type: Research Article
Publication date: June 1, 1992
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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.