Stripe Smut

 

Stripe Smut Information

Scientific Name: Ustilago striiformis

Turfgrass host:  Kentucky Bluegrass, creeping bentgrass.

Time of Year: March thru November

How To Identify Stripe Smut

Stripe Smut is a major cool weather disease of Kentucky bluegrass and creeping bentgrass in Michigan. Because the symptoms are subtle and difficult to detect, the disease is often recognized until extensive damage occurs. Turf infected with stripe smut is stunted and slow to start growing in the spring. Infected grass blades are pale green with long blakc streaks of pustules along the veins. The streaks are not apparent on grass that is mowed short. As pustules open, shoes and clothes become coated with blakc sports. Later, infected blades fray, twist and turn white. The foliar symptoms virtually disappear in the summer, making diagnosis difficult.

 How to get rid of Stipe Smut

First, you can use a blend of turgrass varieties that are resistant ot smut. DO NOT let stripe smut infected grass plants go domant in the summer, as they will die. DMI fungicides, propiconazole, triadimfon, and fenarimol are fungicides that will help control smut, although it may be cheaper to replace part of your lawn.