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University of Florida

US: Possible solution to citrus greening disease not yet legal

Citrus greening disease is a threat to the multi-billion-dollar Florida citrus industry. The disease is not harmful to humans; however, it can affect the quality of citrus people buy. Now it appears researchers have found a solution to citrus tree disease, a disease that was  thought to have no cure. However, growers cannot use this solution for fruit quite yet.

“From about 2009 to now, it has been a big problem,” said Jim Snively, vice president of grove operations at Southern Gardens Citrus. “Every grower in the State of Florida, if you’re growing citrus, you have greening in your grove.”

Snively is constantly looking for traces of this citrus plant disease, which can be identified by yellowing leaves. “It does cause fruit loss, premature fruit drop. And we figure we probably lose anywhere from 25 to 30 percent of our crop before we get it harvested.”

University of Florida tries to find a solution
UF researchers are looking at bactericides as a solution to fight the disease. “Those aren’t currently legal for use in Florida at this time,” said Dr. Michael Rogers, center director and professor at UF/IFAS Citrus Research & Education Center. Instead of spraying trees, researchers learned trunk injections work better; however, they’re illegal.

“To get permission from EPA, you have to go through a series of tests to demonstrate safety of the product,” Rogers said. “And that’s not been done for trunk injections at this point in time.” In the meantime, researchers are informing growers, so they can still mitigate potential issues with trees.

“What we’re doing with growers right now is helping them find ways to alleviate the stress on the trees,” Rogers said. This leaves the researcher optimistic for the future of Florida citrus.




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