153. Derived from: Legner, E. F., R. D. Sjogren, G. S. Olton & L. Moore. 1976. Control of biting and annoying gnats with fertilizer. Calif. Agric. 30(2): 14-17.
Naturally breeding field populations of Hippelates eye gnats and Leptoconops biting gnats were reduced with granular and spray applications of urea to the soil. Control ranged from 10-96 percent depending on the dosage and application method (disked or surface-applied). Possible modes of action are mechanical abrasion of gnat larvae, and the favoring of fungal infections. The use of urea as a substance harmless to natural enemies may be beneficial in the integrated control of pestiferous soil arthropods.
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