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Studies on the Control of the Nuche Fly and Cattle Tick

Inter-American Institute of Agricultural Sciences¹

Abstract

Data from preliminary experiments using rotenone and DDT in the control of the Nuche fly and the cattle tick may be summarized as follows:

A rot enone water extract was found to be useful in controlling the infestation rate of the Nuche fly in cattle although not completely effective in killing the Nuche larvae in the animal. This solution had little apparent effect on the cattle tick. However, it exhibited healing properties.

A 4 percent DDT powder dissolved in kerosene showed an apparent effect in Nuche fly control. It also controlled the cattle tick after three applications, one week apart. No apparent healing properties were shown by this solution. No data were obtained on probable fly mortality due to DDT

Best results in Nuche fly control were obtained with a double spray of 4 percent DDT powder in kerosene and a rotenone water solution made by using green crushed derris roots. All cattle ticks were destroyed after two applications of these solutions, one week apart.

¹ Turrialba, Costa Rica.