Ad
related to: random dead spots in grass lawn pictures
Search results
Results From The WOW.Com Content Network
Turf melting out begins as black to purple spots on the leaf blades. These spots eventually appear on the leaf sheaths. The fungus then begin to move down and invade the crowns and the roots of the plants. From far away, the turf appears yellow or blackish brown. The colors that appear on the turf directly reflect the nitrogen levels in the ...
Turf necrotic ring spot is known to infect various bluegrass and turfgrass species, especially the cool-season grasses. The fungus also infects fescues and bentgrasses (11). It is common in sodded lawns, rapidly growing lawns, and lawns with layered soil (3). The pathogen produces circular patches of bald spots that are tan or yellow in color (12).
When an area of the creeping bentgrass is affected, large dead spots in the turf are seen. [2] These symptoms are most often observed in the summer months when soil and surface temperatures are high. Because Pythium volutum is a root rotting pathogen, the ability of the creeping bentgrass to intake water is inhibited. When soil and surface ...
Ophiosphaerella korrae, Ophiosphaerella narmari, and Ophiosphaerella herpotricha affect bermudagrass (Cynodon species), while the latter fungus also causes dead spot in buffalo grass (Bouteloua dactyloides). Ophiosphaerella korrae is a cause of necrotic ring spot in creeping red fescue (Festuca rubra). [3]
In late summer (sometime in July through September depending on latitude, weather, and other factors) the larvae spin a pre-hibernation web on a plant, stop feeding, and remain in the web. Several months later they leave this web and enter the litter (dead grass and leaves and so on) on the ground, where they spend the winter. [7]
There are many ways to try and manage Drechslera leaf spot. The most favorable would be to find a resistant plant variety. Other ways include collecting fallen leaves in order to reduce inoculum from plant debris, as well as pruning to increase air circulation for the grasses (a reduction in moisture is unfavorable to the pathogen). [5]
Gray leaf spot (GLS) is a foliar fungal disease that affects grasses. In grasses other than maize it is caused by Pyricularia grisea , which only infects perennial ryegrass , tall fescue , and St. Augustine grass in places with warm and rainy climates.
A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1]