Landscape Effects on Pest Management
By Clint Allen, Ph.D.
USDA-ARS Southern Insect
Management Research Unit
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A number of variables can affect insect populations in cotton at a particular location from year to year. One of the factors that may have a profound effect on populations of some insect pests of cotton, such as the tarnished plant bug, is the area of landscape. Recently, wings from tarnished plant bug adults collected in cotton fields adjacent and at least one mile from corn have been examined to gain insight into the host plant of development before moving into cotton. The proximity to corn did not have a major influence on the percentage of tarnished plant bug adults collected in cotton that had developed on corn as nymphs. Also, it is estimated that corn had a bigger impact than pigweed on the contribution of tarnished plant bug adults in cotton.