Description: English: Symptoms of black rot (Guignardia bidwellii) on grape leaf. Date:. Source: : This image is Image Number 1436096 at Forestry Images, a source for forest health, natural resources and silviculture images operated by The Bugwood Network at the University of Georgia and the USDA Forest Service.. Author: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org.
Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org
Wikimedia Commons
Description: English: Symptoms of black rot (Guignardia bidwellii) on grape leaves. Date:. Source: http://www.forestryimages.org/browse/detail.cfm?imgnum=5335097. Author: Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org.
