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- Title
Interaction between difenzoquat and other herbicides for wild oat and broadleaved weed control in barley.
- Authors
O'Sullivan, P. A.; Vandenborn, W. H.
- Abstract
The interaction between barban and difenzoquat was additive upon application at the two- or four-leaf stage of wild oat. Wild oat control with a mixture of barban and difenzoquat at 0.14 + 0.42 kg/ha applied at the two- or four-leaf stage was as effective as the recommended field rate of barban alone (0.28 kg/ha) at the two-leaf or difenzoquat alone (0.84 kg/ha) at the four-leaf stage. Barley yield increases with the mixture were comparable to those obtained with the full rates of the herbicides used alone at their correct leaf stages. This mixture offers the farmer excellent wild oat control, an extended leaf-stage latitude (two- to four-leaf), excellent barley yield increases and the possibility of reduced operating costs. The herbicidal activity of difenzoquat or a barban + difenzoquat mixture was reduced on addition of amine formulations but not ester formulations of herbicides for broadleaved weeds. MCPA ester and bromoxynil plus MCPA were the most compatible broadleaf herbicides when mixed with difenzoquat. Difenzoquat or difenzoquat + barban significantly stimulated the activity of various herbicides on Tartary buckwheat. A mixture of barban + difenzoquat + bromoxynil-MCPA or MCPA ester provided effective wild oat and Tartary buckwheat control. The latter mixtures enable a farmer to eliminate one spray operation. The interaction between difenzoquat and diclofop methyl [4-(2,4-dichlorophenoxy)phenoxy propionic acid methyl ester] was additive. Wild oat control with the mixtures was good and barley yield was increased over that obtained with a recommended field rate of diclofop methyl.
- Subjects
WILD oat; BARLEY; HERBICIDES; LEAVES; BUCKWHEAT
- Publication
Weed Research, 1978, Vol 18, Issue 5, p257
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1978.tb01157.x