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Sugarbeet tolerance of post‐emergence applications of desmedipham and ethofumesate *
Author(s) -
ESHEL Y.,
SCHWEIZER E. E.,
ZIMDAHL R. L.
Publication year - 1976
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1976.tb00409.x
Subject(s) - cotyledon , biology , agronomy , horticulture , chemistry
Summary: Tolerance of sugarbeet (Beta vulgaris L.‘Mono‐Hy Al') to post‐emergence treatments of ethofumesate [(±)2‐ethoxy‐2,3‐dihydro‐3,3‐dimethylbenzofuran‐5‐yl‐melhansulfonate] and desmedipham [(3‐ethoxy‐carbonylamino)phenyl‐N‐phen‐ylcarbamate] was studied in the glasshouse and in the field at several growth stages. The response of sugarbeet to these herbicides was dependent on the growth stage of the plants and the amount of desmedipham in the mixture. Foliar growth was suppressed most when the herbicides were applied at the cotyledon stage; however, recovery from herbicide injury was rapid. Tolerance of sugarbeet increased considerably from the cotyledon stage to the six‐leaf stage. At equivalent herbicide rates, sugarbeet were more tolerant to ethofumesate than desmedipham and their response to mixtures of the herbicides was governed mainly by the rate of desmedipham. Root yields were reduced significantly by the herbicides only when sugarbeet were treated in the cotyledon stage with mixtures that contained 1.12 kg/ha of desmedipham.