Texas ranchers are facing yet another devastating blow, and this time it’s unlike anything they’ve seen before. For the first time ever in the United States, a destructive pest known as the pasture mealybug has been detected—right here in Texas. Just as the state grapples with the looming threat of the new world screwworm, this invasive insect is already wreaking havoc on pastures across multiple counties. But here’s where it gets even more alarming: the pasture mealybug, Heliocococcus summervillei, has never been reported in North America—until now.
On Wednesday, Texas Agriculture Commissioner Sid Miller issued an urgent alert about this pest, which is rapidly damaging forage grasses and hayfields. While it’s new to the continent, researchers at Texas A&M AgriLife Extension Service suspect it may have been silently spreading in Texas since before 2022. So far, it’s been confirmed in 20 counties, including Cameron, Hidalgo, Willacy, Victoria, Galveston, Brazos, and Robertson, leaving pastures in serious decline. Entomologists have documented significant damage in Victoria County alone, and producers in southern Texas first noticed issues as early as mid-April.
The pasture mealybug is a relentless foe to forage grasses, causing a condition known as ‘pasture dieback.’ This results in expanding patches of yellowed, weakened, and dead turf. First identified in Australia in 1928, this species has since devastated millions of acres globally, targeting not just pasture grasses but also rice, sugarcane, and turf. In Texas, it’s been found on popular grasses like Bermudagrass, Bahia grass, Johnsongrass, sorghum-sudangrass, bluestem species, and St. Augustine grass.
And this is the part most people miss: Commissioner Miller warns, ‘This is a completely new pest to our continent, and Texas is once again on the front lines. If it spreads across Texas grazing lands like it has in eastern Australia, it could cost our agriculture industry dearly in lost productivity and reduced livestock capacity.’
The Texas Department of Agriculture is partnering with Texas A&M AgriLife Extension and the USDA’s Animal and Plant Health Inspection Service to respond swiftly. Research is underway to find effective management strategies, though no labeled insecticide currently exists to control this pest. The mealybug attacks leaves, stems, and roots, posing a threat to both tropical and subtropical grasses.
Producers are urged to inspect their fields closely for signs of infestation, including yellowing leaves within a week, purpling or reddening of foliage, stunted growth, drought stress despite rainfall, poorly developed roots, dieback from leaf tips downward, and premature aging. Mealybugs are small—just two to five millimeters long—oval-shaped, and coated in a white, waxy substance. Older insects may have fine hairs.
Ranchers should pay special attention to unmanaged areas like fence lines, ungrazed patches, and roadsides, looking for fluffy, white, or ‘fuzzy’ insects on leaves and stems. Here’s where it gets controversial: Some experts argue that the mealybug’s rapid spread could be linked to climate change, as warmer temperatures may favor its survival. What do you think? Could this be another consequence of shifting environmental conditions?
If you spot any suspicious insects or symptoms, report them immediately to the Texas Department of Agriculture at 1-(800)-TELL-TDA. ‘Early identification is critical, and we need every producer’s eyes on the ground,’ Miller emphasized. ‘We’re working tirelessly with federal and state partners to combat this novel threat and stop it in its tracks.’
As Texas faces this unprecedented challenge, one thing is clear: the fight against the pasture mealybug will require vigilance, collaboration, and innovation. Will Texas ranchers be able to halt its spread, or will this pest become the next major threat to the state’s agricultural landscape? The stakes are high, and the outcome remains uncertain. What’s your take? Share your thoughts in the comments below—this is a conversation we all need to be part of.
