These spots rapidly enlarge up to 1 cmor more and turn dry and brown (see figure 1). Plow under infected celery tissue after harvest and rotate out of celery for at least 1 year. It is incited by pseu. Rotate both seedbeds and production fields so that celery is not grown in the same place 3 or 4 years in a row. · the disease is most troublesome during mild, damp weather, especially warm, humid nights. Celetti, omafrafor reviewing the manuscript. Read on for more information and tips on how to manage late blight on celery. If symptoms are detected, apply protectant fungicides, especially if sprinkler irrigation is used or rain has occurred or is forecasted. · this comprehensive guide covers everything you need to know to identify, prevent and treat cercospora blight in celery , and keep your plants thriving season after season. Fungicides recommended for cercospora blight will also control late blight. Use cultural controls and copper sprays in a certified organic crop. Ray cerkauskas, aafc, harrow, dr. Cercospora early blight is caused by the fungus cercospora apii and is initially characterized by small, round, tan spots on the leaves. Monitor celery fields for late blight symptoms. As celery is usually planted in successive plantings, it is important to pro. Mcdonald, university of guelph and m. Bacterial leaf blight may also appear during wet growing seasons or later in the season when the crop gets larger. Increase spacing between rows and reduce planting densities to improve air movement within the field. High humidity, free water, and cool temperatures favor disease development. Gratitude is expressed to dr. Managing late blight disease in celery between rows to provide ample air circulation. Leaves with many spots will eventually dry up, wither and die (see figure 2). Stalk rot (fungi – rhizoctonia solani): Once late blight on celery is established, it is very difficult to control. Two fungal leaf diseases commonly affect celery in temperate north america. Cercospora early blight and septoria late blight often weaken the leaves and petioles of celery and reduce the marketability of the crop. Do not spread crop residues on production fields. Follow this with regular and consistent field monitoring, starting at the seedling stage and continue until harvest. Cercospora may also infect the celery petioles whe. See full list on ontario. ca Water celery early in the day so the foliage has time to dry before evening. Figures 1 through 4, and figure 6 courtesy of dr. As part of an integrated crop management program, the first key ingredient for successful celery blight management is control of the disease in the seedbed. A serious disease of celery that is favored by high temperatures and moist conditions.
