Agricultural experts are on alert after officials found a Mexican fruit fly on an orange tree in Harlingen.
U.S. Department of Agriculture (USDA) officials confirmed a female Anastrepha ludens fly was found.
State and federal officials set up a Mexican fruit fly regulated area that includes bait traps over an 81-square mile area.
USDA officials said they also release sterile fruit flies to reduce chances of reproduction by any wild flies in the area.
Known by experts as the "Mexfly," the Mexican fruit fly is an agricultural pest that could damage the Rio Grande Valley's citrus crop.
USDA officials said the outbreak appeared to be "transient, actionable and under eradication."