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Second-level integrated pest management in commercial apple orchards

Published online by Cambridge University Press:  30 October 2009

Ronald J. Prokopy ,
Daniel R. Cooley ,
Wesley R. Autio  and
William M. Coli
Ronald J. Prokopy
Affiliation:
Professor, Department of Entomology, University of Massachusetts, Amherst, MA 01003.
Daniel R. Cooley
Affiliation:
Assistant Professor, Department of Plant Pathology, University of Massachusetts, Amherst, MA 01003.
Wesley R. Autio
Affiliation:
Associate Professor, Department of Plant and Soil Sciences, University of Massachusetts, Amherst, MA 01003.
William M. Coli
Affiliation:
Integrated Pest Management Coordinator, University of Massachusetts, Amherst, MA 01003.
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Abstract

As historical background helpful to understanding current concepts and practices of apple pest management, we review the origin and rise of key pests of apple in North America and the evolution of approaches to their management, culminating with the concept of integrated pest management (IPM). We propose four levels of integration of orchard pest management practices. First-level IPM integrates chemically based and biologically based management tactics for a single class of pests, such as arthropods, diseases, weeds or vertebrates. Second-level IPM, the focus of our effort here, integrates multiple management tactics across all classes of pests. We describe components of second-level IPM for Massachusetts apple orchards, which are threatened each year by an exceptionally broad range of injurious pests. We illustrate the tentative advantages and shortcomings of second-level IPM using 1993 data from six commercial orchard test blocks. Our predominant approach was to use chemically based tactics for controlling arthropods, diseases and weeds early in the growing season, and afterwards to rely exclusively (for insects) or largely (for other pests) on biologically based tactics, such as cultural, behavioral, and biological controls. Compared with nearby first-level IPM blocks, insecticide use in 1993 was reduced substantially (about 30%), with only slightly more insect injury to fruit and little difference in populations of foliar insect pests. The results for mite pests and diseases were less encouraging although summer pruning significantly reduced disease injury caused by flyspeck. We discuss how second-level IPM poses special biological or operational challenges to apple pest management practitioners. The concept has merit, but refinements are necessary before it can be recommended broadly to commercial apple growers in Massachusetts as an economical and reliable alternative to first-level IPM.

Keywords

appleintegrated pest managementinsectsdiseasesmitesweedspesticides
Type
Research Article
Information
American Journal of Alternative Agriculture , Volume 9 , Issue 4 , December 1994 , pp. 148 - 156
Copyright
Copyright © Cambridge University Press 1994

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