A modified life table was utilized to provide the basis for an economic appraisal of insects and diseases causing injury to 4 varieties of apples in a 2-year study. Fruit quality and yields in the 1st year of pesticide absence were reduced by 45% and 85% at harvest. In 1972, the 2nd year of pesticide absence, the development of crop injury, particularly apple scab, was more rapid and 3 varieties had complete loss of marketable fruit. 'Jonathan' was least severely affected by both apple scab and major insect pests. Year to year changes in weather conditions can change crop injury potentials in an orchard. The use of insect and disease injury information will aid the uncertainty factor associated with the complex pest management decisions for orchard crops.
Document Type: Research Article
Publication date: August 1, 1974
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.