Levee building problems, pumping problems and late flood establishments are one of the biggest weed control problems in rice. Timing is critical in rice. In general, grass cannot be allowed to get bigger than the 3 leaf stage. You need to think in terms of a fuzzy green carpet instead of thinking about grass plants. There are inexpensive weed control programs, expensive programs and really expensive programs.
Inexpensive programs can work, but they quickly become the most expensive ones when when they fail.
Expensive, properly executed programs are cheaper than clean up programs. It might be the best way to go for a new rice grower. Stam, Facet, Arrosolo, and Bolero control a lot of broadleaf weeds in addition to providing grass control. However, a few skips, holes and other areas with weak stands are inevitable and you may find broadleaf and aquatic weeds there. Consult your dealer, weed guides or consultants to use Blazer, Basagran, Grandstand, Londax or Permit on appropriate weeds.