WebThe fungus overwinters on infected plant residue. The disease is favored by warm temperatures, high humidity, heavy fruit loads and adequate levels of soil fertility. Control: Many of the newer tomato varieties recommended for growth in Oklahoma are resistant to gray leaf spot. If a susceptible variety is grown, cultural and chemical controls ... WebThe severity of this disease often depends on the type of grass it affects. For instance, St. Augustine grass is more resistant to gray leaf spot fungus, while perennial ryegrass is rapidly affected by the disease. In …
Grain Sorghum Disease Texas A&M AgriLife
WebLeaf rust and gray leaf spot can be economically damaging in sorghum, especially in moist environments. These foliar diseases are often associated with late planting and ratoon sorghum. Bacterial leaf spot or Bacterial Leaf Stripe can infect sorghum, but usually only results in cosmetic leaf lesions, not economic losses. WebPhilip Harmon. Gray leaf spot disease is caused by the fungus Pyricularia grisea, also referred to as Magnaporthe grisea. The frequent warm, rainy periods common in Florida create favorable conditions for this fungal disease. This fungus slows grow-in, thins established stands, and can kill large areas of St. Augustinegrass turf. hkia job opportunities
Turfgrass Diseases: Quick Reference Guide - UGA
WebDescription of Gray Leaf Spot (Cercospora zeae-maydis): Gray leaf spot is somewhat self-descriptive, but it appears as spots that are round to oval and are tan in the middle with a dark brown border. When the humidity is very high, the spots turn gray and are profusely fuzzy with spores. It is often confused with Pythium blight in perennial ... WebGray leaf spot is caused by the fungi Pyricularia grisea and P. oryzae, both of which are members of the Magnaporthe grisea species complex. In recent years, significant outbreaks of this disease have occurred on ryegrasses and tall fescues in the Northeast. Gray leaf spot is most often seen in late summer and early fall in this area on higher cut ryegrass … WebAug 13, 2024 · A: That’s the fungus gray leaf spot. It most commonly follows application of nitrogen during the hot summer weather. It is a disease that can be controlled by application of either Daconil or ... hkia evacuation