Date of this Version
Insect Science, Plant Disease, & Weed Science, University of Nebraska Cooperative Extension, Institute of Agriculture and Natural Resources 88(10) (May 27, 1988).
In This Issue:
- Herbicide Injury-Replant?
- Yellow Nutseoge Control in Turf
- Delayed Preemergence Herbicides
There is some risk of crop 1nJury with the use of any herbicide. Certain herbicides are more likely to injure crops than others. Reasons for herbicide injury include incorrect application rate, nonuniform application (overlapping), herbicide carryover, incorrect choice of herbicide for the situation, unfavorable weather conditions, spray drift, etc.
Yellow Nutsedge Control in Turf
Yellow nutsedge is one of the most troublesome weeds in lawns. Basagran is the safest and most effective herbicide for yellow nutsedge control. Mix 1 oz./gal of water along with an equal amount of surfactant or detergent and apply to vigorous growing plants. If desired control is not obtained with the first application, make additional applications at 10 to 14 day intervals. Because nutsedge can germinate later in the season, additional applications are usually required. As with all postemergence treatments, applications should be made to unmowed turf and mowings made after herbicide treatments should be delayed for 3 to 5 days.
Delayed Preemergence Herbicides
Timely herbicide application is not always possible in the busy planting season. Some but not all preemergence herbicides can be applied early postemergence with good results. However, most of these treatments are more effective when applied preemergence than postemergence especially against annual grasses. A rain or sprinkler irrigation is required after application for best control. The following table lists herbicides that are commonly used in Nebraska and can be used both preemergence and early postemergence.