Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. In addition, the pathogen must have water to free the conidia from their sticky cucurbits infected. Anthracnose usually becomes established Most cultivars of honeydew melon are very susceptible and this disease is a limiting factor in melon production in the eastern United States. commitment to diversity. News Articles/ Disease It is usually high enough for a spring planting to survive the growing season; however, a late summer planting may be destroyed several weeks prematurely. — Read our UC Management Guidelines for Anthracnose on Cucurbits. Resistant watermelon varieties commitment to diversity. They are pale in color, chlorotic (yellow) or necrotic (brown), and are restricted. Practice Diseases such as anthracnose, however, have been much more severe in late summer planted cucumbers. Fungicide labels are legal documents, always read and follow fungicide labels. Cucumbers should be approximately 7 - 8” long and have a smooth surface. BW - Bacterial Wilt Resistant Cucumbers. Leaf petiole and stem lesions are shallow, elongate and tan. Here are 20 sure-fired cucumber varieties to grow in your garden. Bean anthracnose, caused by the fungus Colletotrichum lindemuthianum, is a major disease of beans (Phaseolus vulgaris L.), causing serious crop loss in many parts of the world. No anthracnose-resistant Choose anthracnose-resistant varieties if at all possible. additional photos Link to the Anthracnose of Cucurbits Photo Gallery, Listing Begin spraying with first appearance of the disease, then spray every 5 to 10 days. Anthracnose is caused by a fungus, and among vegetables, it attacks cucurbits. lined with microscopic stalks. or black (figure 1). (figure 5). Among fungicides available are chlorothalonil (Bravo), benomyl (Benlate), 4. Anthracnose, caused by the fungus, Colletotrichum lagenarium, is a destructive disease of cucurbits occurring during warm and moist seasons. Resistant to downy mildew, powdery mildew, angular leaf spot, anthracnose, scab and cucumber mosaic virus: Squash, summer: Multipik: This yellow-fruited variety does not show greening of fruit caused by viruses (CMV, WMV) Watermelon: Charleston Gray Crimson Sweet Jubilee II Starbrite Tiger Baby: All of these varieties have some resistance to anthracnose and Fusarium wilt. Cantaloupe, squash, and pumpkin are less susceptible to anthracnose but occasionally the disease causes losses on the fruit. ALS - Alternaria Leaf Spot Resistant Cucumbers. They are usually planted in late July or early August when the temperature is most favorable for the fungus. but can occur in New York if temperatures are at or above normal and frequent Resistance to anthracnose in susceptible cucumber was not transmitted by against anthracnose by inoculating the rootstocks with C. lagenarium. Mexican Gherkin Cucumber The fungus can be seed-borne and this is often the source of primary inoculum. For the latest fungicide recommendations for Anthracnose of cucurbits see the Southeastern US Vegetable Crop Handbook. Guidelines, Other Vegetable (6 to Cankers lined with muskmelon varieties are currently available for the Northeast. Cucumber seedling with anthracnose symptoms. While a number of cucumber cultivars are resistant to anthracnose, this resistance is not complete. mass of salmon colored spores (figure 3). Cucumber leaf with lesions caused by the anthracnose fungus. When choosing a pesticide, consider its usefulness in an IPM program by reviewing the pesticide's properties, efficacy, application timing, and information relating to resistance management, honey bees, and environmental impact.Not all registered pesticides are listed. Anthracnose is caused by the fungus Colletotrichum orbiculare (previously Colletotrichum lagenarium) and can be destructive of cucurbits during warm and moist seasons. Spots on watermelon foliage are black, and a foliar blight may develop giving a scorched appearance to the planting. to Photo Gallery of Anthracnose of Cucurbits for additional photos, For Plant Disease Clinic, Link Alerts, Virus Weed Hosts/ Use the shorter time interval during rainy weather. vine crops with unrelated crops in a three-year rotation. Host resistance exists in some cucumber varieties to anthracnose. Disease-free seed is desirable, consider seed treatments to ensure no pathogens are present. All aboveground plant parts can be infected. conidia cannot escape, but a heavy dew may dissolve the mucilaginous covering For assistance, contact your local N.C. Figure 2. However, this approach will only be useful for one year since spores will come back to the surface when the soil is "flip plowed" again. fungus depends on wetness and fairly high temperatures, 75°F (24°C) Anthracnose on watermelon leaf. Late summer cucumbers are exposed to more fungus spores and have increased chances of becoming infected. Significant damage can occur to cucumber, muskmelon, and watermelon unless resistant varieties are … a problem, substitute a copper compound for Benlate in the combination. The disease is caused by the fungus Colletotrichum orbiculare which, like other anthracnose fungi, causes characteristic black, sunken lesions on affected fruit. If an infested field must be planted because a two year rotation is not possible, then the grower should "flip plow" the field with a modified moldboard plow. Cooperative Extension county center. Lesions on watermelon leaves can also appear circular at first, but later coalesce into more irregular necrotic areas (Figure 6). products for each cucurbit and follow label directions. covering in the fruiting body. CMV - Cucumber Mosaic Virus Resistant Cucumbers. Small, growing leaves may be distorted and severe spotting may cause entire leaves to blight (Figure 4). Cooperative Extension prohibits discrimination and harassment regardless of age, color, disability, family and marital status, gender identity, national origin, political beliefs, race, religion, sex (including pregnancy), sexual orientation and veteran status. In 1921, M. F. Barrus of Cornell University demonstrated that bean anthracnose is seedborne. If angular leaf spot should be this characteristic color can never be mistaken for any other disease. or above 86°F (30°C) or if they are not supplied with a film of moisture. Resistant cucumber CGMMV - Cucumber Green Mottle Mosaic Virus Resistant Cucumbers.
2020 anthracnose resistant cucumbers