South Carolina cucurbit growers should reduce tebuconazole applications in managing gummy stem blight. The pathogenic fungus has become moderately resistant to this very commonly used fungicide, according to Clemson plant pathologist Tony Keinath in The South Carolina Grower. Seven watermelon fields were sampled in 2019 (six fields) and 2021 (one field) in Beaufort, Bamberg, Barnwell and Hampton counties. Of 229 …
A Primary Challenge to Pepper Production
By Pamela Roberts, Aastha Subedi, Erica Goss and Jeffrey Jones Bacterial spot of pepper is one of the most common and chronic disease challenges to pepper production. Infection can occur on the stems, leaves and fruit of the pepper plant. SYMPTOMS AND SPREADSymptoms on the leaves start as small, water-soaked (dark, greasy-like spots) areas that are light brown at first …
Vegetable Disease Update in South Georgia
By Clint Thompson Fruit and vegetable season is in full swing across the South Georgia region. Watermelons, a popular crop produced in the area, are currently being harvested. Ty Torrance, University of Georgia Cooperative Extension vegetable agent for Colquitt, Tift and Worth counties, talks about production and the lack of disease pressure growers encountered this year. “There have been some …
Managing Phytophthora Blight on Pepper
Phytophthora blight disease on pepper and tomato has been observed in South Carolina vegetable fields, according to Clemson plant pathologist Tony Keinath and Extension agent Andy Rollins in The South Carolina Grower. Heavy rainfall in the Upstate from May 23 to May 26 led to the disease emergence after June 1. The saturated soils provided an ideal environment for oospores …
Field Surveys for Resistance-Breaking Viruses in Tomatoes
By Ozgur Batuman and Salih Yilmaz Florida is the leading state in the United States for the production of fresh market tomatoes. In recent years, the emergence of novel tomato-infecting virus species and resistance-breaking variants worldwide has raised concern for the tomato industry. More than 300 virus and virus-like pathogens have been reported to infect tomatoes, which collectively limits their …
Pecan Industry Leader Cautions Against Potential Surge in Scab Disease This Summer
By Clint Thompson Hot and dry spring weather conditions in the Southeast meant minimal scab disease pressure for pecan producers. But growers need to be mindful of a potential disease surge if rain persists this summer in the region. Lenny Wells, University of Georgia Extension pecan specialist, cautions producers about the potential impact that scab disease can have at this …
Disease Update for North Florida Watermelons
Gummy stem blight remains the main disease threat to North Florida’s watermelons, as harvests continue across the Suwannee Valley. The combination of increased rains and harvest equipment moving through the fields provides better potential for the disease to spread, says Bob Hochmuth, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) regional specialized Extension agent in Live Oak, Florida, …
Blueberry Management: What to do in June
Florida blueberry harvests have ended for the 2022 season, but management continues this summer. According to University of Florida Institute of Food and Agricultural Sciences, growers need to be actively scouting for algal stem blotch. The disease is significant on southern highbush blueberries. It will stunt growth and cause leaf yellowing, as well as increased susceptibility to Botryosphaeria. Producers need …
Brown Rot Management Key for Peach Producers
By Clint Thompson Alabama Extension reminds peach producers that brown rot disease can flare up this time of year and wreak havoc on the remaining crop. That is why growers should be diligent with their preventative fungicide sprays, says David Lawrence, Alabama regional Extension agent. “It’s almost a given that if you don’t spray preventatively, you’re going to face it …
Downy Mildew Disease in South Carolina
Cucurbit downy mildew disease was identified this week in South Carolina, according to the The South Carolina Grower. The disease was observed in a cucumber field in Bamberg County. Clemson Extension reminds producers to make fungicide applications every seven days. Any stretch longer than this increases the potential that the disease will spread. Recommended fungicides for cucumbers include Omega (Fluazinam, …