To investigate the control efficacy of metamifop·oxaziclomefone 18％EC against annual weeds in direct-seeding rice fields and the safety to rice growth.A field trial was carried out in 2023 by foliar spray at the 2.5-4 leaf stage of rice and 2-4 leaf stage of annual weeds according to GB/T 17980.40-2000《Pesticide guidelines for the field efficacy trials(Ⅰ)》.The field trial result showed that metamifop·oxaziclomefone 18％EC could effectively control the annual weeds such as Echinochloa crusgalli(L.)Beauv.,Leptochloa chinensis(L.)Nees.,and Digitaria sanguinalis(L.)Scop with the active ingredient dosage of 108.0-135.0 g a.i./hm2.At 30 days after treatment,the weeds quantity and weeds fresh weight control efficacy was 89.07％-92.51％,and 92.00％-94.13％,respectively.Metamifop·oxaziclomefone 18％EC can effectively control annual weeds in direct seeding rice fields,and very safe to rice plants and benefial organisms.
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