Lawns, Gardens & Trees


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Control Crabgrass in Your Lawn

Think about making an application of crabgrass killer to your lawns very soon. Once soil temperatures warm up to 50 degrees Fahrenheit the crabgrass seeds will begin to germinate and a pre-emergent application should be made. Use Acclaim, Dimension, or products that contain DSMA, Dacthal, Betasan, Balan, Pendimethalin, or Tupersan.Crabgrass Plant

To be effective, pre-emergent herbicides must be in place before germination occurs. Preemergence treatments are preferred because they are generally more effective for crabgrass control and less injurious to the turfgrass that postemergence treatments. In general, preemergence herbicides should be applied before soil temperatures reach 50 to 55 degrees Farenheit. This will allow the pre-emergent herbicide to form a barrier before the crabgrass seedlings emerge. Preemergence herbicides work by inhibiting the growth of young seedlings. These products do not eliminate established plants and must be applied before germination begins. Applications made very early in the spring have potential to break down before the end of the germination window and are, for the most part, not recommended. This is a particular problem in the three out of 10 years when late-season conditions are conducive for a second germination flush. Delaying preemergence applications in a very cool or dry spring would provide better season-long control because crabgrass germination is also delayed under these situations. Nearly all of the commercially available preemergence herbicides are very effective when applied properly. As always, read and follow label instructions when making herbicide applications.

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