The Asian Longhorned Tick Has Now Been Spotted In Illinois

An invasive pest posing a significant threat to U.S. cattle herds is making its way across the eastern portion of the country.
The Asian longhorned tick has now been spotted in Illinois.

According to University of Illinois Extension Beef Cattle Educator Teresa Steckler, “It has been located in one county so far. However, the problem with this tick is it is parthenogenic, which means that it can reproduce without a male. So a single tick can turn into thousands in a short period of time. You can have so many ticks on a cow of heiffer or whatever that can cause exsanguination, or there could be so many bites that an allergic reaction can be caused in these animals as well.”

She tells farmers what to keep an eye out for when looking for these invasive pests.

“If you’re bringing any in, like backgrounders, or buying bulls, cows, whatever, please quarantine those animals, pour them, and do a very vigilant check that they do not have any of these ticks. They’re going to be small. You’re going to have to be very careful when you go to check them, but be proactive. They are very small. They’re about the size of a poppy seed, but if cattle have any large numbers, there will be clusters of them, and of course, as the ticks engorged themselves, they’ll get buch bigger. And typically, we see them around the udder, the brisket area, the ears, anywhere there could be folds of skin. The ticks like to get down in those areas.

Asian longhorned ticks have been spotted in nineteen states.

Related Stories
U.S. Department of Health and Human Services Secretary Robert F. Kennedy, Jr. and U.S. Department of Agriculture Secretary Brooke Rollins today released the Dietary Guidelines for Americans, 2025–2030.
Trade uncertainty—especially regarding soybeans—continues to weigh on future outlooks, even as farm finances and land values remain resilient.
Roger McEowen with the Washburn University School of Law joined us to provide legal insight and context on these issues facing agriculture. Today, he discusses pesticide litigation.
Sen. Deb Fischer reintroduces the HAULS Act to update hours-of-service exemptions and definitions affecting livestock and agricultural haulers. She joins us on Market Day Report to share more about her proposed legislation.
New World Screwworm cases in Mexico, including one within 200 miles of the U.S. border, are adding pressure to livestock markets and trade decisions.
According to multiple reports, Sen. Amy Klobuchar is considering a bid for Minnesota governor. If elected, this would open a key seat on the Senate Agriculture Committee.