Effect of Procedure on Perform Ance of Certain Insecticides Recommended for Codling Moth Control

Abstract

The effect of singletree and 9-tree plots on the relative efficiency of codling moth control of 5 insecticides was compared. Chemical analysis of leaf and fruit samples determined the amt. of adulteration due to spray drift. Lead arsenate, calcium arsenate, zinc arsenate, kalo and manganar were effective in the order named. Spray drift did not affect the relative efficiency of these insecticides since the fruit was largely protected by the foliage from adulteration due to spray drift.