The invention discloses a weeding composition containing penoxsulam, metamifop and
pyribenzoxim. The
mass ratio of the effective components which are the penoxsulam, the metamifop and the
pyribenzoxim in the composition is 1-50:0.1-20:0.1-20. A preparation includes 1-60% by
mass of the effective components, with the balance being auxiliary components permissable and acceptable in pesticides. The
dosage form of the composition is an emulsifiable solution, a suspension,
wettable powder, water-dispersible granules, an
emulsion in water, a
microemulsion, granules, a microcapsule and an
aqueous solution. The composition can effectively control main weeds in a rice field such as barnyard grass,
leptochloa chinensis (L.) Nees,
digitaria sanguinalis (L.) Scop., and Indian goosegrass, and
winter wheat weeds such as
alopecurus aequalis,
avena fatua L., polypogon fugax Nees ex Steud.,
poa annua, sclerochloa dura, puccinellia distans (L.) Parl.,
lolium multiflorum Lamk., lolium temulentum L., bromus japonicus Thunb. ex Murr., phleum paniculatum Huds.,
aegilops tauschii Coss.,
beckmannia syzigachne, crested wheat grass, shepherd's purse,
descurainia sophia and malachium aquaticum (L.) Fries..