![]() Many of these diseases are minor in impact while others are capable of causing major destruction only the most important pathogens will be covered here.īipolaris sorokiniana affects all turfgrass species in the warm, wet summer months. Symptoms appear as small dark purple to black spots on leaf blades which enlarge with centers fading to tan, often with a yellow halo. We offer a fungicide program to target the specific fungus affecting your lawn and can make additional recommendations to help create a healthy and beautiful lawn.The "leaf spot" diseases are widespread on cool and warm-season turfgrasses and are caused by many different genera of fungi. ![]() We offer a commercial grade fungicide that can inhibit Ascochyta growth and can make other recommendations to help create a healthy and beautiful lawn. These recommendations can help limit the amount of damage from the fungus along with preventing future disease development. It is helpful to keep your grass height around 3 inches, use sharp mower blades to avoid "wounding" the turf and never mow when the lawn is wet. Power raking is also a tool to help control Ascochyta since the fungus spores likely survive in thatch. If you fertilize, you will want to fertilize regularly using low nitrogen fertilizer and have your lawn aerated to ensure maximum water penetration into the soil. If your lawn is affected by Ascochyta, we recommend watering in the morning rather than at night so that the heat of the day can help evaporate any excess moisture. Ascochyta symptoms can appear similar to drought stress.Īscochyta Leaf Blight control is comparable to other fungus management in that it is suggested to maintain uniform moisture on the lawn and avoid overwatering. ![]() It is characterized by the grass leaves dying back from the tip (as opposed to from the root to the tip) and may cause large, irregular patches of straw-colored turf. Ascochyta can develop at any point in the growing season, but is especially prevalent during periods of high heat and drought conditions. If the damage is severe, we recommend power raking to remove thatch (the fungus lives on dead roots) and overseeding with one of several different varieties of turf grass that are particularly resistant to NRS.Īscochyta Leaf Blight is a fungus that is becoming more common in Colorado's Kentucky bluegrass lawns. Occasionally areas that are infected with NRS may take several treatments or even several seasons to manage effectively. We typically recommend two applications of a professional grade fungicide to treat NRS. Aeration is also recommended to loosen soil compaction and avoid hydrophobic soil. If you water in the early morning hours you may want to begin watering closer to sunrise so that the heat of the day can burn off any excess water. It might look dry but excess water is prime breeding ground for fungus. If you suspect you have NRS, one of the most important things we suggest is to avoid overwatering the turf. Necrotic Ring Spot is a perennial fungus which means that while some recovery can be seen in the cooler months, if left untreated it can return and intensify in subsequent years. Areas affected by this fungus will gradually lighten in color and eventually die. NRS fungus attacks the roots of your lawn, making the turf incapable of absorbing moisture and nutrients. Necrotic Ring Spot (NRS) is a fungus, characterized by "fairy rings" or circular patches of dead turf.
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