![]() These include: crop rotation, fungicide application, variety selection, irrigation management, tillage to reduce residue, and good grassy weed control. Applying adequate moisture, without irrigating the recovering turf excessively, will encourage turf recovery. Effective controls for a similar disease, Septoria leaf blotch, have been prescribed for Ascochyta leaf spot diseases. Fungicide use does not seem to accelerate turf recovery. To reduce Ascochyta leaf blight mow less frequently, only as necessary to. More rapidly growing grasses such as tall fescue and perennial rye grass will recover more quickly than will the slower-growing bluegrasses and fine fescues. Consistent and correct watering, repair of malfunctioning irrigation equipment or a soaking rain will encourage the turf to recover, a process which may take 10 days to 3 weeks. However, prolonged stress due to poor irrigation coverage may cause a loss of turf. How can I prevent ascochyta leaf blight?įortunately, this disease rarely kills turf, as the crown and root system are usually not affected by the disease. Severe infections may cause large straw colored patches to appear in the lawn, usually in areas where irrigation coverage is poor. Affected leaves are bleached and pinched in appearance and the entire leaf may die back to the ground. Stagonosporopsis trachelii has only been reported to cause leaf spot on Campanula medium in Italy (Garibaldi et al. The disease can be diagnosed by examining individual leaves (grass blades) that die back from the tip. This may lead to the incorrect assumption that the disease has been “tracked” onto the lawn from another location. To understand the composition of fungi associated with this disease in Zhejiang Province, China, a total of 65 single-pycnidiospore. ![]() How do I know if my lawn has ascochyta leaf blight?īrown wheel-tracks and footprints may appear in areas where mowing or foot traffic cause additional stress. Ascochyta blight, an infection caused by a complex of Ascochyta pinodes, Ascochyta pinodella, Ascochyta pisi, and/or Phoma koolunga, is a destructive disease in many field peas (Pisum sativum L.)-growing regions, and it causes significant losses in grain yield. Ascochyta leaf blight is most severe when turf is stressed due to high heat and improper irrigation – insufficient amount, improper frequency, or poor coverage. This disease is common when cool weather (like May – June conditions) is followed by hot summer conditions. Stress resulting from hot, dry summer conditions increases the potential for Ascochyta leaf blight on lawns. This disease is more common during hot, dry periods and followed by cool and rainy conditions. Adapted by Jane Rozum, Douglas County Extension, from the CO-Horts blogoriginally authored by Tony Koski, Extension Turf Specialist. Ascochyta leaf blight is a common foliar disease that occurs in the late spring to early summer.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |