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Brown patch is a common turfgrass fungal disease that is caused by species in the genus Rhizoctonia, usually Rhizoctonia solani. [1] Brown patch can be found in all of the cool season turfgrasses found in the United States. Brown patch is most devastating to: Bentgrass (Agrostis sp.), ryegrass (Lolium sp.), Annual bluegrass (Poa annua), and ...
Pythium disease, also known as "Pythium blight," "cottony blight," or "grease spot," is a highly destructive turfgrass disease caused by several different Pythium species. All naturally cultivated cool-season turfgrasses are susceptible to Pythium and if conditions are favorable to Pythium it can destroy a whole turfgrass stand in a few days or less. [1]
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).
Brown ring patch can be found on annual bluegrass, creeping bentgrass, and rough bluegrass; it is diagnosed predominately during periods of high humidity or periods of extended leaf wetness. [10] Soil temperatures of 55–60 °F (13–16 °C) are associated with initial disease development. [11] The disease is more severe on greens which have ...
Dollar spot is a fungal disease of turfgrass caused by the four species in the genus Clarireedia, in the family Rutstroemiaceae. [1] The pathogen blights leaf tissues but does not affect turf grass roots or crowns. There is evidence that a fungal mycotoxin produced by the pathogen may cause root damage, including necrosis of the apical meristem ...
The symptoms of Drechslera leaf spot are mostly small, dark-brown, or purplish spots on the leaves. [1] The spots eventually expand and become lighter-brown or ashy in the middle (usually having dark margins around the center). Once the spots run together, girdling of the entire leaf blade occurs. Warm weather induces crown rot and eventual ...
Holub. Lolium arundinaceum, tall fescue is a cool-season perennial C 3 species of grass that is native to Europe and California. It occurs on woodland margins, in grassland and in coastal marshes. It is also an important forage grass with many cultivars that used in agriculture and is used as an ornamental grass in gardens, and sometimes as a ...
Dactylis glomerata is a species of flowering plant in the grass family Poaceae, known as cock's-foot, [2] also colloquially as orchard grass, or cat grass (due to its popularity for use with domestic cats). It is a cool-season perennial C 3 tufted grass native throughout most of Europe, temperate Asia, and northern Africa. [3][2][4][5][6]