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it a spray program, is adapted on specificity of chemicals fo reach individual insect and disease control problem. The cost of such a program could well be excessive and much out of proportion with the result - obtained. For the greatest efficiency at the lowest cost a spray program should make use of the spray materials that have the widest range for insect and disease control and which when used alone or in combination will carry the minimum of risk of injury to trees and fruits. The spray programs that are suggest in the 1952 Spray Bulletin have taken into consideration these factors. It must be kept in mind that these programs are general and may require some changes to meet the needs of individual orchards. The fruit industry as well as all other industries is operating in an
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