The fall harvest season offers an opportunity to make note of problem weeds, and fields where weed control did not meet expectations.  The next step is to make plans to use this fall as an opportunity to control some problem weeds.  Fall is a good time to use herbicides to control problematic perennial, biennial and winter annual weeds because those plants are moving carbohydrates down into their root systems as part of the overwintering process and so herbicides are also translocated to the root system.  This week Mark Loux, OSU Extension weed specialist offers the following recommendatio