Areas turn dark pruplish-red, then turn brown and finally a dull white. Damage is mostly seen on the entire sheath of the grass causing the leaves to drop off. Kentucky bluegrass, bentgrasses, ryegrasses, chewing fescue, tall fescue and creeping red fescue. Late winter, spring and fall. Cool wet spring and fall months.
Areas turn tan or brown.
Patches are somewhat circular in shape. All lawn grasses. Late spring and summer. When soil temperatures are in the mid 50's, the population of hatched nematodes increases rapidly. Plants will lack overall vigor and will have difficulty with low soil moisture or high temperatures.