Date of Award
Master of Science (MS)
William J. Keppler
The LD-50 levels for 2,4-D and Ronnel were determined and compared on the larvae of Culex pipiens Linneaus mosquitoes. The World Health Organization technique for the 24 hour bioassay was employed. Ronnel served as an indicator of susceptibility to pesticides and it was found that 2,4-D is toxic to mosquito larvae with an LD-50 level of 1.95 p.p.m. It was also found that a concentration of 20 p.p.m. ethanol or greater causes lethality in the larvae.
Ettinger, William H., "Determination of the LD-50 Level for 2,4-D on Wild Type Culex pipiens Mosquito Larvae in Illinois" (1974). Masters Theses. 3700.
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