AgWeb released information on Apr. 21 about managing major insect pests in cotton crops, emphasizing the importance of integrated pest management (IPM) to protect yields and maintain fiber quality.
The guidance is relevant as early- and mid-season insects can threaten cotton growers’ returns, making effective pest control crucial for crop success. IPM principles are recommended not only to reduce immediate pest pressure but also to prevent the development of resistance to commonly used insecticides.
The article highlights that variety selection forms the basis of any cotton operation, with growers advised to choose seeds adapted to local conditions and featuring traits such as Bt technology for built-in resistance. Cultural practices like adjusting planting dates and managing weeds can further reduce vulnerability by limiting alternate hosts for pests. The maintenance of beneficial insects is encouraged as part of an integrated approach.
A proactive stance is recommended, involving seed treatments—especially in cooler springs where thrips pose a risk—and regular field scouting after emergence. The text notes that some regional thrips populations have developed resistance to neonicotinoids, while wet weather can lessen systemic seed treatment effectiveness, sometimes requiring foliar sprays instead. Economic thresholds are emphasized as a tool for determining when intervention is necessary during mid-season infestations from pests like fleahoppers or bollworms; applying insecticides only above these thresholds helps preserve natural predators and prevents secondary outbreaks from pests such as aphids or spider mites.
Mitigating resistance risk involves rotating insecticide modes of action, using full label rates, adhering to refuge requirements with Bt varieties, and employing biocontrol methods alongside chemical options. These strategies help ensure current season effectiveness while maintaining future control options.
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An integrated approach not only improves immediate pest control but also preserves valuable management tools into future seasons.
