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Brown patch symptoms differ depending on the various maintenance practices performed on the turfgrass (mowing height, fertilizer, watering, etc.) Symptoms on turfgrasses that are wet for extended periods and are closely mowed will produce a distinctive gray-purplish bordered ring "smoke-ring" that is up to 50 cm in diameter. [3]
When the soil gets waterlogged, the grass roots don’t get enough oxygen, which can allow fungal diseases to take over and cause brown patches. To avoid this, make sure your lawn drains well and ...
The grass is medium to light green in color and has a coarse texture with short upright seedhead stems that grow to about 3-5 inches. Native to Southern China, it was introduced to the United States in 1916 [1] and has since become one of the common grasses in the Southeastern United States and Hawaii. It can also be considered a weed. [2]
The species is between 18 and 30 mm long and up to 4 mm broad and is a chestnut brown coloration. It is similar to a variety of other European lithobiid centipedes, particularly the striped centipede, Lithobius variegatus, but L. forficatus does not have stripes on its legs.
These patches are about 5 to 10 cm in diameter, but can grow to be about 1 meter in diameter. Eventually, as the infected turf dies, the spots turn brown. Within the patch, there may be areas of living grass at the center, creating a frog-eye appearance that this pathogen is known for.
Brown ring patch is most destructive when the weather is humid and temperatures are stressful to the grass. Thus, in cool-season grasses such as tall fescue and perennial ryegrass, the disease is most severe under high temperatures (highs above 85 °F (29 °C), lows above 60 °F (16 °C)).
Lithobius forficatus is the most abundant centipede species in Europe. Like other centipedes, they are more active at night. They feed on insects and other small invertebrates. The eggs are deposited singly in soil. [2] The lifespan can be over 3 years.
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