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The Influence of Spray Programs on the Fauna of Apple Orchards in Nova Scotia. XIII. Effects of Perthane on Predators1

Published online by Cambridge University Press:  31 May 2012

K. H. Sanford  and
F. T. Lord
K. H. Sanford
Affiliation:
Canada Department of Agriculture, Kentville, Nova Scotia
F. T. Lord
Affiliation:
Canada Department of Agriculture, Kentville, Nova Scotia
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Extract

In Nova Scotia, a spray program that integrates chemical and natural control of apple pests has been evolved which is both economical and satisfactory. Among the natural enemies of injurious arthropods that have been favoured by this program are a number of general predators. Further investigation of the ecological principles on which integration is based requires a more intensive knowledge of the factors that influence the densities of these predators. Because of the difficulties of investigating these factors in the orchard, methods of simplifying the predator-prey systems have been sought (Lord, 1956, 1962). These attempts assessed the effects of low dosages of DDT on the interrelationships of phytophagous mites and their natural enemies.

Type
Articles
Information
The Canadian Entomologist , Volume 94 , Issue 9 , September 1962 , pp. 928 - 934
Copyright
Copyright © Entomological Society of Canada 1962

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References

Henderson, C. F., and McBurnie, H. V.. 1943. Sampling technique for determining populations of the citrus red mite and its predators. U.S. Dept. Agr. Cir. 671.Google Scholar
Lord, F. T. 1949. The influence of spray programs on the fauna of apple orchards in Nova Scotia. III. Mites and their predators. Canadian Ent. 81: 202–230.CrossRefGoogle Scholar
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MacPhee, A. W., and Sanford, K. H.. 1961. The influence of spray programs on the fauna of apple trees in Nova Scotia. XII. Second supplement to VII. Effects on beneficial arthropods. Canadian Ent. 93: 671–673.CrossRefGoogle Scholar
Lord, F. T. 1962. The influence of spray programs on the fauna of apple orchards in Nova Scotia. XI Effects of low dosages of DDT on predator populations. Canadian Ent. 94: 204–216.CrossRefGoogle Scholar