The US Has an Anti-Corruption Plan. It also affects many flies

Carnivorous insects Flies, a major threat to livestock, have returned to the United States after a 60-year absence. This week, the US Department of Agriculture it has been confirmed presence of New World screwworm in a calf in south Texas.

It was removed from the US in 1966 and to the south Panama as of 2006, its latest resume in Mexico led to the re-entry of the eagles into the country, indicating that they could arrive by the summer of 2025. It took a long time, but the larvae have arrived. And to solve the problem, officials are using a tried-and-true method: releasing large numbers of adult flies.

Screwworm infection occurs when the female fly lays her eggs in open wounds or other parts of warm-blooded animals. After the eggs hatch, the larvae hatch and feed on live animals before they turn into flies. As adults, screwworm flies do not bite or eat meat. Scientists in the 1930s and 1940s thought that if they could stop female flies from reproducing, they could solve the problem. At the time, New World screwworms were killing hundreds of thousands of cattle a year, mostly in the American South and Southwest.

In the 1950s, USDA researchers succeeded when they used radiation on male worms to make them sterile. When these monkeys are released into an infected environment, they encounter the microscopic insects that produce eggs. No children are being born, and the population is falling apart. It is known as a method of making insects, it was successfully used on the island of Curaçao, near the coast of Venezuela. It only took seven weeks for the devastation to end, and efforts saved the island’s herds of goats, which were an important source of food.

This method takes advantage of the fact that female New World screwworms only mate once in their lifetime. Sally DeNotta, an assistant professor of animal science at the University of Florida, said: “The life cycle stops. No babies are born. It’s been very successful.”

For years, the dense forest between Panama and Colombia called the Darién Gap served as a living barrier from which sterile flies were released to prevent the spread of screwworms northward. But insects began to cross the barrier in 2022.

To prevent further spread in South Texas, the USDA has cordoned off about 12 miles around an infected calf and is releasing sterile screwworm flies from trucks. This is in addition to the 4 million sterile flies per week already being dropped in the region. Anticipating the movement of the screwworm north, in February, organization change it its efforts to distribute 100 million sterile flies per week to target the area along the US-Mexico border.

“While this development poses a serious threat to our livestock and wildlife, we are not embarrassed,” USDA Secretary Brooke Rollins said on the House Agriculture Committee. meeting Thursday.

He said about 400 million flies per week are needed to defeat screwworms. Currently, the US can only produce about 100 million flies per week residence in Panama.

Mexico’s pest control center was closed in 2012, but the USDA is sales of $21 million to help rehabilitate and transform the existing facility in Metapa, Mexico to produce an additional 60 to 100 million sterile flies per week. The facility is expected to be operational this summer, according to the USDA.