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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]
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 plant. When turfgrass has low levels of nitrogen it turns yellow and when it has high nitrogen levels, it turns blackish brown.
F. septica's plasmodium may be anywhere from white to yellow-gray, [6] typically 2.5–20 cm (1.0–7.9 in) in diameter, and 1–3 cm (0.4–1.2 in) thick. [7] The plasmodium eventually transforms into a sponge-like aethalium , analogous to the spore-bearing fruiting body of a mushroom ; which then degrades, darkening in color, and releases its ...
The first step to removing weeds from your lawn and garden is identification. Learn about 20 common types of weeds and how to treat them.
Leucocoprinus brunneoluteus is a similar yellow dapperling mushroom from South America with a pronounced brown umbo and thin, fragile flesh. [46] Leucoagaricus sulphurellus (formerly Leucocoprinus sulphurellus) is a yellow species that occurs in the Caribbean area, but has gills that bruise bright blue-green. [17]
Powdery mildew fungi must be adapted to their host for successful infection. [citation needed] Under optimal conditions, ascospores mature and are released to initiate new infections. [5] Conditions necessary for spore maturation differ among species. In asexual reproduction, the mother fungi and offspring are genetically identical. [4]
A 1987 study found evidence of a possible biocontrol strategy for bacterial wilt of turf grass. The researchers found that antiserum to Pseudomonas fluorescens or Erwinia herbicola from hosts which have survived infections by the corresponding pathogens is capable of reducing wilt symptoms in turf grass caused by Xanthomonas translucens. The ...
The tan (yellow) spot fungus was first described by Nisikado in 1923 in Japan. [ 5 ] and was later identified in Europe, Australia and the US, in the mid 1900s. [ 6 ] The disease is one of the most important fungal disease on wheat and the fungal pathogen is found to infect in all parts of the world wherever wheat and other susceptible host ...