MIGRATION OF COTTON PESTS: PATTERNS AND IMPLICATIONS FOR MANAGEMENT
Mar 13, 2017

Crop Protection WCRC Croprotection-australia WCRC1
Introduction                                                                Back to Table of contents

Cotton has a large pest complex (Matthews, 1989), and many of the major pests are migratory to some degree. Kennedy (1975) distinguished insect migration from dispersal because of the persistent, straightened-out movement, and unresponsiveness to appetitive stimuli, shown by migrants. The term migration has been used in many senses, but in this review it will describe the long-range end of a continuum of movement (Farrow and Daly, 1987). This continuum ranges from trivial, appetitive movement below the biological boundary layer (for example, within or above a cotton crop) to prolonged flight in the geostrophic layer of the atmosphere, where winds can be strong and downwind displacements are of the order of tens to thousands of kilometres...

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