Multichemical Granules Formulated with Gum Xanthan, Loess, and Tung Oil

Multiherbicide granules were formulated containing 1.3% fluazifop {(±)-butyl 2-[4-[[5-trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoate} (w/w) in polymerized tung oil overlaid on a granular matrix of gum xanthan-loess containing 2.7% linuron [3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea] or oryzalin (3,5-dinitro- N 4 , N 4 -dipropylsulfanilamide). Under greenhouse conditions the granules were as effective in selective control of velvetleaf ( Abutilon theophrasti Medic. ♯ 3 ABUTH), hemp sesbania [ Sesbania exaltata (Raf.) Cory ♯ SEBEX], corn ( Zea mays L. ♯ ZEAMX), and red rice ( Oryza sativa L. ♯ ORYSA) in soybeans [ Glycine max (L.) Merr. ‘Hill’] as when the herbicides were sprayed separately. When applied preemergence at 0.56 to 0.14 kg ai/ha, tung oil-encapsulated fluazifop on loess granules killed 100% of stolon bermudagrass [ Cynodon dactylon (L.) Pers. ♯ CYNDA] and was as effective as sprayed fluazifop.