US approval for Valent's aquatic herbicide
Sumitomo Chemical’s US subsidiary, Valent USA Corporation (Walnut Creek, California), has received US approval for the aquatic herbicide, Tradewind (Kumiai Chemical’s bispyribac-sodium). The product provides “a much-needed new class of chemistry to the aquatics market”, the company says. It is effective against fluridone-resistant hydrilla, while conserving desirable aquatic plants, Valent adds. The approval follows the January registration of another aquatic herbicide, Clipper (flumioxazin), which also provides a new mode of action to the sector. Both products are based on active ingredients that are well established for crop use.