Multistate project studies solutions to bacterial spot in tomatoes, peppers

Tomatoes are big business for Florida farmers, contributing $500 million annually. Bell and chili peppers are also popular crops among consumers with production value of more than $536 million. However, bacterial spot is a threat to yields and harvest revenue. 

University of Florida researchers are working to solve this major issue along with scientists at the University of Georgia, North Carolina State University, The Ohio State University, University of Central Florida, Auburn University in Alabama and U.S. Department of Agriculture’s Agricultural Research Service. 

Bacterial spot can affect both the fruit and the plant. Unsightly spots are noticeable on the fruit affecting quality and marketability.  

Researchers have characterized the bacteria for race, copper sensitivity, antibiotic sensitivity and bacteriocin production. The research has identified four races, which the information can be used by growers when selecting resistance pepper plants.  

Since most of the strains were copper sensitive, alternative compounds should be incorporated into spray programs. The research also is looking at making the plant resistance by stacking multiple genes to ensure longevity against the different races of bacterial spot pathogen. 

Pinpointing the causes of plant diseases helps scientists and growers manage the pathogens, leading to yields not lost to disease. 

View the full statement on the NIDB.

Project supported by USDA Capacity – Research funds. Photo courtesy of University of Florida / IFAS Extension.