Solarization of winery waste can prevent spread of vine mealybug
Pomace piles covered with clear plastic or uncovered to evaluate mealybug survival
What has ANR done?In trials at two wineries, UC Cooperative Extension researchers verified the survival of vine mealybug in unfermented pomace. Infested clusters were added to grapes processed in a grape press. Insects survived the press at each winery. This research demonstrated that growers and wineries can prevent vineyard contamination with mealybugs by not spreading pomace in vineyards or stockpiling it near vine rows. Management of this waste was still an issue for the industry. Unfermented winery waste is not commonly composted, and it may remain in static piles for weeks or months. UC advisors compared the fate of vine mealybug in pomace piles covered with clear plastic with their fate in uncovered piles. Results showed that covering pomace for one week reduced the number of live vine mealybugs by nearly 100 percent.
Solarization with clear plastic kills vine mealybugs in pomace pilesThe researchers have delivered this message in presentations in winegrape growing regions across the state. They also published the research results in
Supporting Unit:Integrated Pest Management
Rhonda J. Smith, (707)565-2621, firstname.lastname@example.org
Lucia G. Varela, 707) 565-2621, email@example.com