Dandelions are flowering throughout the Midwestern United States. Dandelions are a difficult weed to control. The best time to spray for dandelions is when the “puffballs” are present. Before the formation of the puffball, the weed is translocating most of the plant energy upwards for flower production (yellow flower and puffball). Once the puffball is formed, energy is translocated downward for vegetative growth. Downward movement of the plant energy (photosynthates) enhances the activity of herbicides. Many homeowners however do not want to wait this long for dandelion control. If dandelions are to be controlled prior to puffball stage, try to apply herbicides when soil temperatures are above 55 F. In cases where dandelions are numerous, multiple applications will probably be needed.
Red thread is occurring on perennial ryegrass turfs through the Midwest and Northeastern United States. This disease will often appear initially appear as small reddish patches. Look for the red threads (stroma) protruding from the leaf blade.