Multiple spring applications may be necessary to arrest disease development. Control with fungicides is effective with applications the previous fall or in the spring at first sight of the disease. When the disease is active, off-colored turf around the edges of the patch can be observed with very thin existing turf or other healthy species that are not affected by the disease in the center of the patch. As its name implies, large patch symptoms generally begin as small baseball-sized patches but can develop into automobile-sized areas. While the pathogen may be the same, the symptoms of large patch are quite different from brown patch, in that they typically occur in spring or autumn especially under overcast, cool and moist weather conditions. The QoI family of fungicides (strobilurins) are among the best fungicide options for control of brown patch because they offer up to 28 days of control, as well as control of other diseases that may occur at the same time.Ī pathogen similar to the one causing brown patch causes large patch on warm-season turfgrasses such as zoysiagrass and bermudagrass in the transition zone and South. ![]() Fortunately, the solutions to control brown patch are numerous and effective. While it is relatively easy to identify (see brown patch symptom photo above), it can sneak into any turf stand and by the time you notice, it will be at significantly high levels. When nighttime temperatures start hovering around 65 to 70 F in early summer, this disease can wreak havoc on tall fescue, Kentucky bluegrass and perennial ryegrass. One of the most widely spread diseases that can affect almost any cool-season turf lawn in many parts of the country is brown patch. ![]() Q: What are the turfgrass diseases that I should watch out for most on my clients’ lawns?Ī: Managing turfgrass can be tricky, so here are the top five lawn diseases not to be ignored.
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