Malathion and Malathion-Parathion Sprays for Control of the Soft Scale on Citrus in California1

Abstract

In experiments on control of Coccus hesperidum with sprays of 0.5, 1.0, and 1.5 Ib. of 25% malathion p. alone and in combination with 0.5, 1.0, and 1.5 lbs. of 25% parathion w. p. per 100 gal., 1.5 lb. of malathion plus 0.5 lb. of parathion was the most effective.