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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]
Some of these turf grass species include annual bluegrass, creeping bentgrass, Kentucky bluegrass, perennial ryegrass, fine fescue, and bermudagrass. 5 These species of grass are not the only types of turf that can be diagnosed with red thread disease but are the most common hosts. 5 Noticeable symptoms of red thread disease are irregular ...
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.
Non-native grasses are classified as invasive if they have the following three attributes: The grass must have a pathway to be delivered to a new location, e.g. boat, shoe, animal, vehicle, feed, contaminated seed, etc. It is able to tolerate its new environment long enough to establish and reproduce. It is able to coexist with native plants.
A foxtail is a spikelet or cluster of a grass, that serves to disperse its seeds as a unit. Thus, the foxtail is a type of diaspore or plant dispersal unit. Some grasses that produce a foxtail are themselves called "foxtail", also "spear grass". They can become a health hazard for dogs, cats, and other domestic animals, [1] and a nuisance for ...
By 1980 the grass had been sown on over 100,000 acres but it failed to take hold in many regions, such as parts of Texas and New Mexico. In the desert grasslands and shrublands of southeastern Arizona, however, it did well, growing best in areas with sandy soils, rare freezes, and summer rainfall totals of about 15 to 22 cm (5.9 to 8.7 in).
Microlaena stipoides grows to a height of approximately 0.7 metres and produces delicate, drooping stalks of spikelets. [3] The naked caryopses (grains) are similar in shape to rice grains but smaller, approximately 5 mm long, with a mass that varies widely, ranging from 1 mg to 7 mg. [5] [6] [8] The grass grows best in acidic soils and is drought- and frost-tolerant. [9]
Panicum mosaic virus (PMV) is a positive-sense single-stranded RNA viral pathogen that infects plant species in the panicoid tribe of the grass family, Poaceae. [1] The pathogen was first identified in Kansas in 1953 and most commonly causes disease on select cultivars of turf grass , switchgrass , and millet .