Tests with Bait Sprays for the Control of Drosophila1

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Abstract
Bait sprays contain-ing the toxicants heptachlor, malathion, aldrin and Bayer L-13/59, each at 0.1% concentration, were tested in cheesecloth-covered cages under field conditions for the control of Drosophila on tomatoes. Each insecticide was combined with a fresh mixture of 10% blackstrap molasses, 1% of apple cider vinegar (acid content of vinegar 5%), 0.1% of Fleischmann''s Active Dry Yeast Type 1821 and water. The plants were not treated but quart strawberry boxes filled with cull tomatoes were sprayed and one box was placed on the ground in each cage. Eight days after the 2d application heptachlor, aldrin and Bayer L-13/59 gave over 93% reduction in the number of Drosophila eggs laid in freshly slit ripe tomatoes that were placed in the cages as compared to 74% reduction for malathion.

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