Abstract:

DDVP, Phyphanon (malathion) and Sumithion (fenitrothion) were compared with Dipterex (trichlorfon) in effectiveness and cost as aquatic insecticides in laboratory aquaria. The 24-hour LC₁₀₀ for the test organism, the backswimmer (Notonecta sp.), ranged from 0.05 ppm Sumithion to 1.0 ppm Dipterex. The least-cost insecticide was Sumithion, $1.33 to treat a 0.1-ha pond 1 m deep at double the effective concentration. Dipterex cost was highest, $22.00/0.1-ha pond at double the effective concentration. Carp fry exposed to Sumithion at 0.1 ppm did not suffer lethal or apparent sublethal effects.

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Date 1989/06/01

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