Lansing, Michigan, USA
April 16, 2013
Source: Michigan State university Extension
Posted on April 16, 2013 by Ben Werling, Lina Rodriguez-Salamanca, and Mary Hausbeck, Michigan State University Extension and Department of Plant, Soil and Microbial Sciences
Cultural practices and a rotation of strobilurin and protectant fungicides can limit celery anthracnose, a damaging disease of celery
An anthracnose fungus has been identified as the cause of unusual symptoms occurring between 2010 and 2012 in Michigan celery. Below are some questions and answers about the biology and control of this disease from Michigan State University Extension.
What is celery anthracnose?
Celery anthracnose is caused by the fungus Colletotrichum acutatum. This specific fungus is known to infect other vegetables including pepper, tomato, and spinach. It was first reported as a pathogen on celery in Australia during the 1980s, and was first detected in Michigan in 2010. The common name of this disease is “anthracnose” and is shared with diseases of onions, tomatoes and cucurbits. However, anthracnose in these crops refers to diseases caused by other types of fungi, not the C. acutatum that infects celery.
What are its symptoms?
Symptoms include cupped leaves and twisted petioles with long and thin brown lesions (Figure 1). Other symptoms include development of adventitious roots.
Figure 1. Pictures of celery anthracnose symptoms in the field including (A) a severely symptomatic plant next to an asymptomatic plant, (B) young symptomatic plants, (C) leaf curling, (D) adventitious root formation in petioles, (E) gall initiation, (F) twisted petioles with lesions and (G) an oval lesion. Photo credit: Rodriguez-S L.M and Hausbeck M.K 2010
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