I have a question about this. I have been told  I can spray roundup at anytime up until the harvest interval. I have been told I can have damage from roundup during or pre tassel. I was also told to spray round up and fungicide now (v9 -11) and the field would be fine for the year. I have also been told not to spray fungicide between V-8 and when the tassel emerges. One label supported this if I omitted the adjuvants.

Chemical rep says I have sandbur so not to worry about the grass. A lot of the grass is a foot tall so I think it is foxtail. Some pigweed too.  What kind of control will I get even if I do spray. Will have to hire a helicopter if that matters.