Comments on “Long-Distance Transport of 2,4-D”

It has been suggested that soil treated with a herbicide and subsequently carried by wind and deposited on plant foliage can cause crop injury. This study compared foliar uptake and translocation of herbicides applied to plants as an aqueous solution or in herbicide-treated soil. Leaves of 3-wk-old seedling alfalfa, grape, and pea were treated with14C-labeled thifensulfuron, chlorsulfuron, glyphosate, 2,4-D, and bromoxynil. Significant amounts of all herbicides were absorbed by pea, alfalfa, and grape from the aqueous solutions, whereas very limited absorption occurred from herbicide-treated soil. Prolonged and multiple exposure to herbicide-treated soil did not increase herbicide uptake. High relative humidity enhanced herbicide absorption from aqueous solutions but not from herbicide-treated soil. All herbicides except bromoxynil were readily translocated in alfalfa, grape, and pea. Limited quantities of herbicides were absorbed from herbicide-treated soil by plant foliage, and this small amount is unlikely to cause crop damage.

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Foliar Absorption and Translocation of Dicamba from Aqueous Solution and Dicamba-Treated Soil Deposits

Al‐Khatib

Parker

Fuerst

1992

Weed technol.

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This study was conducted to compare foliar absorption and translocation of dicamba applied to plants as an aqueous solution or as dicamba-treated soil deposits. When applied as an aqueous solution, 65 to 95% of14C-dicamba was absorbed by pea, alfalfa, and grape; whereas, limited absorption (0.4 to 4.7%) occurred from dicamba-treated soil. Based on dose-response evaluation, the low levels absorbed from treated soil are unlikely to cause crop damage.14C-dicamba translocation was more than 80% of absorbed14C in pea, alfalfa, and grape. Acropetal translocation exceeded basipetal translocation.

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Comments on “Long-Distance Transport of 2,4-D”

Cited by 4 publications

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Relative airborne losses of commercial 2,4-D formulations from a simulated wheat field

Relative airborne losses of commercial 2,4-D formulations from a simulated wheat field

Foliar Absorption and Translocation of Herbicides from Aqueous Solution and Treated Soil

Foliar Absorption and Translocation of Dicamba from Aqueous Solution and Dicamba-Treated Soil Deposits

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