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

Abstract

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-N4,N4-dipropylsulfanilamide). Under greenhouse conditions the granules were as effective in selective control of velvetleaf (Abutilon theophrastiMedic. ♯3ABUTH), hemp sesbania [Sesbania exaltata(Raf.) Cory ♯ SEBEX], corn (Zea maysL. ♯ ZEAMX), and red rice (Oryza sativaL. ♯ 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.