Red rice (Oryza spp.) reduces rice (Oryza sativa L.) grain yield and quality. A field study was conducted to compare two red rice control tools, the first using the Clearfield™ system and the second using high rates of clomazone and rice seeds treated with safener to suppress red rice emergence. The treatments included: check control without herbicide application, three treatments for the formulated herbicide mixture (imazethapyr 75 g i.a. L-1 + imazapic 25 g i.a. L-1) under the Clearfield system, and three clomazone treatments (clomazone 500 g i.a. L-1). The most efficient treatment for red rice control was the formulated mixture of imazethapyr + imazapic (0.7 L ha-1 PRE followed by 0.7 L ha-1 POST). This treatment promoted 100% red rice control, without affecting plant stand and promoting high grain yield.
Clearfield System; imazethapyr + imazapic; clomazone; Oryza sativa
