The invention provides a cyhalofop-butyl-containing
weed oil suspension composition, which comprises the following components: 1 to 15 percent of cyhalofop-butyl, 10 to 30 percent of
quinclorac, 1 to 10 percent of emulsifying agent, 2 to 8 percent of
wetting dispersing agent, 0.1 to 5 percent of suspension stabilizer, 0 to 5 percent of antifreezing agent, 0 to 0.2 percent of
organosilicon defoaming agent and the balance of
vegetable oil. The cyhalofop-butyl-containing
weed oil suspension composition has the obvious synergistic effect, and the prevention and
control effect on
weed caper
euphorbia seed in a
paddy field, such as cockspur grass and the like, is superior to that of a single-
dose medicament of the cyhalofop-buty and the
quinclorac. The weed oil suspension composition improves the prevention and
control effect, enlarges
weed control spectra, retards weed resistance and reduces application amount and application cost, and is safe for crops.