LivestockScrewworm turns up in US wildlife for the first time, in a Texas ranch elk
USDA confirmed New World screwworm in a hunter-harvested elk in Pecos County, Texas, as New Mexico reported a new cattle case and weekly US detections rose to six.
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Sterile insect technique
Livestock
LivestockNew World screwworm reaches 56 US cases as New Mexico finds infested horse and calf
Five cases are active in Texas and New Mexico, more than 1.4 billion sterile flies have been released since June, and a Mexican town is protesting the smell of a sterile fly plant.
LivestockMating changes the chemical coat of screwworm flies, Kentucky and USDA scientists find
The finding could help explain why females mate only once and may one day improve the sterile-fly technique used to fight the livestock pest, now back in Mexico and Texas.
LivestockUSDA commits $25 million to an Arizona sterile fly facility against screwworm
On 29 July 2026 the US Department of Agriculture pledged $25 million for a sterile fly dispersal facility in Douglas, Arizona, which would be the country's second after one in Texas.