There are effective late-fall post-emergence options for management of dandelion and winter annual weeds in wheat for use mostly in those fields that were not treated with burndown herbicides prior to emergence. For late-planted fields where wheat has not emerged, it’s still possible to use the full range of burndown herbicides discussed in a previous article (http://corn.osu.edu/newsletters/2014/2014-32/#5). A couple of questions we received lately about burndown include:
1. Is it possible for pre-emergence applications of glyphosate to reduce the yield of wheat? Not that we know of, as long as the wheat shoot is still underground.
2. What about a burndown of glyphosate plus Sharpen at two ounces per acre? It’s not possible to use 2,4-D as a burndown in fields that have been planted. The combination of glyphosate and Sharpen is an effective alternative to make sure that emerged marestail plants are controlled. The one ounce per acre rate of Sharpen should be adequate this late in the season. … Continue readingRead More »