What is in this article?:
- U.S. banana supply threatened by TR4 disease
- Resistant varieties do exist
- Tropical race four of Panama disease, or TR4, wreaks havoc on banana plants by traveling up their trunk and killing their canopy.
- It appeared in the 1990s and destroyed banana plantations in Southeast Asia and Australia but has yet to arrive in the Western Hemisphere.
The banana consumers know today could disappear from U.S. store shelves because of a tropical disease, just as its predecessor did more than 50 years ago, and a University of Florida researcher warns that awareness is needed to stop history from repeating itself.
Tropical race four of Panama disease, or TR4, wreaks havoc on banana plants by traveling up their trunk and killing their canopy. It appeared in the 1990s and destroyed banana plantations in Southeast Asia and Australia, but has yet to arrive in the Western Hemisphere. There is no treatment for the disease.
In response to the TR4 threat, UF researcher Randy Ploetz has developed a six-part action plan he is sharing at international banana conferences. Ploetz, a plant pathologist with UF’s Institute of Food and Agricultural Sciences, was the first to identify TR4 in 1990. He is based at UF’s Tropical Research and Education Center in Homestead.
Ploetz’s plan recommends surveying quarantine measures in Western countries, increasing awareness of TR4, training diagnosticians, implementing an advanced method to accurately and rapidly identify TR4, mapping existing populations of the pathogen in the West and creating protocols for TR4 eradication.
“It’s kind of a wish list,” Ploetz said. “In an ideal world, if all six of these were addressed, I’d feel more confident that we had this thing well in hand.”
Bananas are the No. 1 fruit in the U.S., and the country imported more than 4 million tons of bananas from Latin America and the Caribbean in 2008 at a value of $1.3 billion, according to the U.S. Department of Agriculture.
Race 1 of Panama disease was originally recognized in Latin America in 1890 and moved through the region wiping out plantations of America’s first favorite banana, the Gros Michel, until the 1960s when banana exporting companies were forced to convert to a variety with resistance to race 1 — Cavendish.
Although Cavendish resists the still-prevalent race 1, it is susceptible to TR4. Today 99 percent of the bananas that are consumed in the U.S. are Cavendish. No comparable replacement exists for it at this time, Ploetz said.