Didn't preburn my RR canola in spring because it was to cold / no weeds. Did my first pass in crop in the mud. When it was time to do the 2nd pass water was standing in ruts from 1st pass. When it was dry enough to spray, canola was in 40%-50% bloom. was told NOT to spray because it would cause a reduction in yeild. 2 to 3 weeks from swathing and field looks horrible. LOTS of wildoats and thistle. Next time I will spray!!! I'll gladly take the reduced yield then have to look and deal with this mess. Worst thing is waiting to swath and not been able to do anything about it till then. Field has lots of potholes and small sharp hills. it's a challenge to spray at the best of times. Any one try spray RR canola this late?