University of California Cooperative Extension - Riverside County
As plants senesce or are harvested, Brown stink bug, Euschistus servus migrate from crops that act as hosts, such as; shrubs, vines, many broadleaf weeds, legumes, corn, soybean, sorghum, okra, millet, snap beans, peas, into nearby susceptible crops such as cotton. The presence of host crops in close proximity to susceptible crops increases the difficulty of managing Brown stink bugs in cotton. Repeated insecticide applications, necessitated by migration from host crops, are not only costly, but increase the possibility of secondary pest outbreaks. Brown stink bugs can be found across all of southern Canada, much of North America and often throughout the year in parts of the southern U.S.
In 2013 damage to cotton from Brown stink bug resulted in a 25-30% yield reduction which required repeated pesticide applications. Typical cotton insecticide applications in Southern California range from 3 – 4 applications. However, in 2013, infestations of cotton by the Sweetpotato Whitefly and Brown Stink Bug resulted in ≈ 11 combined applications.
To better implement an area wide integrated pest management (IPM) program for Brown Stink Bug more information is needed concerning its distribution and the influence that movement from host crops have on its populations. We will use pheromone trapping in the mixed cropping landscape of the Palo Verde Valley of southern California to assess the distribution and movement of Brown Stink Bug within cotton and neighboring host crops. This information is essential to understand Brown Stink Bug dispersal capability and will help cotton producers manage the pest with minimal use of pesticides in cotton.