What medicine kills weeds best and fastest?

At present, the main dosage forms are oil suspension and wettable powder. Of course, oil suspension has a good effect. This product is really a good product, because there are few herbicides and pesticides for controlling gramineous weeds after seedling in corn field, which is safe for corn, so it is favored. The patent of nicosulfuron expired this year, and there are many similar products on the market, which are particularly miscellaneous. As for the well-made manufacturers, I know that Anhui Fengle and Hefei 91 may be better, because they made it earlier and have more experience. Nicosulfuron can't be made into many dosage forms, because the original drug is easy to decompose in water, which is its fatal weakness. Emulsifiable oil may be difficult to make, and the dissolution of the original drug is a big problem. It is not easy to make water dispersible granules because water is needed in the granulation process.