Abstract
The effects of the use of Cu, Zn, As, S, oil, and parathion upon citrus insects and mites are discussed. The use of Cu and Zn results in definite increases in citrus rust mite, citrus red mite, purple scale and Florida red scale populations. There is a good possibility that fruit which is to be canned may be grown with a considerable reduction in the cost of spray programs without sacrificing the benefits of maximum yields.