Field Studies on Insecticides for the Control of the Mexican Fruitfly1

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Abstract
The effectiveness of tartar emetic, Cu sucrate, and Na fluosilicate sprays containing sugar in the control of the Mexican fruitfly (Anastrepha ludens) was detd. in 20 plots in citrus groves in northern Mexico. Glass traps were used to measure fly populations both before and after spray applications. Analysis of variance showed highly significant differences between treatments both before and after correction of trapping data. The reduction in fly population amounted to 415% in tartar emetic plots and 1.6% in Cu sucrate plots. In the Na fluosilicate plots 6.8% more flies were captured than in the untreated plots. No fruit and foliage injury was occasioned by applications of sprays containing tartar emetic when small amts. were applied as a mist. The quality of Marsh seedless grapefruit from trees that had received repeated applications of tartar emetic sprays during 2 seasons and Valencia oranges that were sprayed with similar sprays for 3 seasons was not affected.

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