Abstract
Slow-release insecticide tablets were formulated, using the systemic insecticides acephate, disulfoton, and oxamyl. The eduction rate was dependent upon water solubility of the insecticide. The three insecticides were selected because of both their current acceptability and the wide range of their solubility in water. In the laboratory, tablets with 2 min of daily soaking released 87% of acephate in 7 days. However, with 15 min of daily soaking 96% of oxamyl and only 7% of disulfoton was released in 7 days. The tablets were equal to or better than other formulations of the three systemics in efficacy and residual control of the chrysanthemum aphid, Macrosiphoniella sanborni (Gillette), and citrus mealybug, Planococcus citri (Risso)under greenhouse conditions.
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