Cotton jassids have been found in two separate cotton fields in Tensas Parish, marking the first documented field detection of this pest in cotton within Louisiana. One field was located on the northern end of Tensas Parish near the Madison Parish line, whereas the other field was located on the southern end of the parish near Catahoula Parish. Their establishment in cotton fields suggests the potential for broader distribution across the state. Although the current cotton harvest season may limit immediate economic impact, the presence of cotton jassids is a concern for next season. It is currently unknown if cotton jassid will successfully overwinter in Louisiana making it difficult to assess the potential for infestations next year.

Previously, cotton jassids were observed in hibiscus plants sold at retail stores across the state. Cotton jassids have piercing-sucking mouthparts, which they use to extract sap from leaves and stems. Their saliva contains toxins that damage plants leading to symptoms such as leaf curling, yellowing, and stunted growth. Heavy infestations can significantly reduce crop yield.

In response to these reports, intensive monitoring efforts will be initiated to track the spread across cotton-growing parishes in the state. We will know more about success of cotton jassid overwintering in the spring. Early detection and coordinated response will be key to protecting Louisiana’s cotton industry.

Anyone who suspects the presence of cotton jassids in their crops or garden plants should contact their local extension agent or reach out directly to LSU AgCenter Field Crop Entomologists James Villegas (jvillegas@agcenter.lsu.edu, 225-266-3805) or Dawson Kerns (ddkerns@agcenter.lsu.edu, 806-474-7220).

Adult cotton jassid. Photos by D. Kerns (LSU AgCenter)