Turf weeds in the heat

Be cautious with herbicide applications and high temperatures

07/27/2022

The projected weather outlook is predicting temperatures exceeding 90 F throughout Nebraska. Elevated temperatures slow cool season turf (Kentucky bluegrass and tall fescue) growth, especially when combined with low precipitation. Warm season grasses like zoysia and buffalograss increase growth potential during high temperatures. Summer annual grassy weeds like crabgrass, goosegrass and foxtail and the obstinate perennial weed, yellow nutsedge outgrow, and may sometimes dominate, cool season turfs during the summer months.

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Late season crabgrass contamination

Mid-season crabgrass management and control

07/27/2022

This time of year, especially in turf thinned by drought, disease, traffic or other afflictions, crabgrass and other summer annuals may pop up, even if the turf was treated with an effective preemergence product. No product is 100% effective even when applied correctly “Escapes” may occur for a number of reasons including misapplication. Regardless of the reason or type of turf area, older and larger crabgrass is much more difficult to control than younger plants, making mid-season the optimal time to control crabgrass post emergence.

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