Mode of action Absorbed mainly via leaves, and secondarily via roots, and is translocated in both phloem and xylem. Symptoms include almost immediate growth inhibition, a chlorotic growing point with necrosis of the terminal bud, resulting in plant death in 2 to 4 weeks. Applied pre-emergence, post-emergence and water-applied.
Uses Provides control of Echinochloa spp., as well as many broad-leaved, sedge and aquatic weeds (such as Alisma plantago-aquatica, Ammania coccinea, Cyperus difformis and Scirpus mucronatus) in rice. Penoxsulam provides residual weed control, depending on soil type and use rate, and is rainfast within 1 hour of application. In tropical rice, application will be at 10–15 g/ha; in temperate rice, 20–50 g/ha. Primary use will be a post-emergence application in dry-seeded, water-seeded and transplanted rice.