Provided herein are synergistic herbicidal compositions containing and methods for controlling undesirable vegetation utilizing (a)a compound of formula (I): or an agriculturally acceptable salt or ester thereof and (b) a cellulose biosynthesis inhibitor, e.g., indaziflam and isoxaben. The methods and compositions described herein provide control of undesirable vegetation, e.g., in direct-seeded, water-seeded and transplanted rice, cereals, wheat, barley, oats, rye, sorghum, corn or maize, sugarcane, sunflower, oilseed rape, canola, sugar beet, soybean, cotton, pineapple, pastures, grasslands, rangelands, fallowland, turf, tree and vine orchards, aquatics, plantation crops, vegetables, industrial vegetation management (IVM) or rights-of-way (ROW).本文提供包含下列之協同性除草劑組成物以及使用下列來控制非所欲的植被之方法:(a)式(I)的化合物:或是其農業上可接受的鹽類或酯類及(b)纖維素生物合成抑制劑,例如茚氟草胺和異草胺。本文所說明之方法及組或物提供,例如於直播的、水播和移栽的稻米、穀類、小麥、大麥、燕麥、黑麥、高梁、玉米(corn)或玉米(maize)、甘蔗、向日葵、油菜、芥花、甜菜、大豆、棉花、鳳梨、牧草、草地、牧場、休耕地、草皮、樹和葡萄樹果樹園、水生植物、種植園作物、蔬菜、工業植被管理(IVM)或公用路線穿越用地(ROW)中之非所欲的植被之控制。