Common Lawn Diseases in Minnesota

Lawn Disease

Knowing the signs early can help prevent further damage to your lawn. Here’s a list of the most common lawn diseases we see in Minnesota.

Brown Patch

There has never been a more obvious name for a disease. This lawn illness presents exactly how it sounds, like a brown patch that appears and grows day after day. If you don’t identify and treat this specific disease as soon as possible, the health of your turf will continue to decline. This will eventually lead to a pest infestation that can kill your lawn for good.

Leaf Spot

Leaf spot is a name given to a number of different fungal organisms. Symptoms appear as circular brown lesions on the blades of your grass. If the disease isn’t treated, the blades will start to yellow and wilt, giving it the appearance of drought stress. Homeowners often make the mistake of watering their grass to bring it back but that might make the issue even worse and cause it to spread. During the summer the disease will spread to the crowns and roots of your grass, killing large portions of your turf which will be very expensive to repair. If you suspect lead spot is affecting your grass, call the pros at Showcase Lawn Care.

Large Patch

Similar in name and action, the large patch greatly resembles the brown patch when it comes to showing up on your turf. While this turf disease is similar, it will generally affect your lawn only during warm weather, whereas brown patch is more privy to warm weather, but doesn’t necessarily keep its distance from warm-weather grass. 

When observing large patches on your turf, you’ll notice that they can range from a few feet to 25 feet around, and it will be a tough disease to cure. Grasses that are susceptible to large patch are ones like centipede grass, buffalo grass, zoysia grass, and many more. Large patch prevention methods include core aeration and overseeding, hydration, and good mowing techniques. 

Dollar Spot

Appearing as a white or bleached grass about the size of a silver dollar, dollar spot occurs most often in spring and summer. As they grow, they will merge and form bigger spots that eventually kill your grass, leaving you with patches of dirt all over your yard. Dollar spot prefers high humidity, wet grass, and temperatures above 70 degrees. If dollar spot is present, bag and dispose of all mower clippings so as not to spread the disease and call Showcase Lawn Care immediately.

Red Thread

Red thread usually occurs in the cool, moist conditions of spring and fall. The disease affects ryegrass, bentgrass, bluegrass, and fine fescue. It appears as red to pink web-like threads that will kill your grass if action is not taken. The disease can be prevented by watering early and letting your grass dry out before the cooler temperatures of night arrive.

Snow Mold

There’s a good reason to rake your lawn in the fall, and it’s to prevent snow mold. Snow mold grows under piles of leaves and other debris. When spring arrives, you’ll notice a web-like substance on your grass. Luckily, the condition usually clears up after raking it and letting it dry out.

Fusarium Blight

Fusaruim, also called pink snow mold, is most prevalent during hot, humid conditions when the grass is under drought stress. Affected turf will appear as light green round patches 2 to 6 inches in diameter. As temperatures increase, the affected grass changes from light green to reddish-brown and finally to a dead straw color. Fusarium infects a number of cool-season grasses but is most damaging to Kentucky bluegrass.

Necrotic Ring Spot

Necrotic ring spot usually infects cool-season grasses such as Kentucky bluegrass in the spring or fall. The disease attacks the crowns and roots of the plant which can weaken your turf’s resistance to other diseases. The first signs of necrotic ring spot are the appearance of light green to straw-colored spots in the lawn that can be several inches to several feet in diameter.

Call the lawn disease experts

It can be tough to identify these diseases and find the path to curing them on your own. That’s why when your Minnesota lawn is becoming overwhelmingly harder to handle, the expert lawn care advisors are around to help. Contact us today to schedule a consulation.

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