A suspected pasture mealybug was recently observed in bahiagrass at a hay field near Kaplan, Louisiana (Vermilion Parish). During a field visit, we inspected a hay field where a small patch of bahiagrass showed noticeable discoloration similar to symptoms associated with pasture mealybug injury (Figure 1).

A few mealybugs were found on leaf blades near the lower portion of the canopy (Figure 2). Plant samples were collected from the affected area for additional examination and insect specimens were submitted to USDA. Final confirmation from USDA is still pending.

The finding is notable because there is an active pasture mealybug infestation in sugarcane located only a few miles from the hay field. If confirmed, this would likely represent the first detection of pasture mealybug in a pasture system in Louisiana. The observation highlights the importance of continued monitoring of grass pastures, particularly in areas near known infestations in sugarcane. Producers should be alert for unusual discoloration, thinning, or decline in bahiagrass and other forage grasses.

If you suspect pasture mealybug in your pastures and/or hay fields, please contact your area LSU AgCenter Extension Agent. You can find your agent through this link: Find Your Agent

Figure 1. Discoloration observed in bahiagrass.

Figure 2. Suspected pasture mealybug from bahiagrass.