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Washoff of Residual Photosystem II Herbicides From Sugar Cane Trash Under a Rainfall Simulator

Washoff of Residual Photosystem II Herbicides From Sugar Cane Trash Under a Rainfall Simulator

Aaditi Dang, Mark Silburn, Ian Craig, Melanie Shaw, Jenny Foley

J Agric Food Chem. 2016 May 25;64(20):3967-74.

PMID: 26964670

Abstract:

Herbicides are often applied to crop residues, but their fate has not been well studied. We measured herbicide washoff from sugar cane trash during simulated rainfall, at 1, 8, and 40 days after spraying (DAS), to provide insight into herbicide fate and for use in modeling. Herbicides included are commonly used in the sugar industry, either in Australia or in Brazil. Concentrations of all herbicides and applied Br tracer in washoff declined exponentially over time. The rate of washoff during rainfall declined with increasing DAS. Cumulative washoff as a function of rainfall was similar for most herbicides, although the most soluble herbicides did have more rapid washoff. Some but not all herbicides became more resistant to washoff with increasing DAS. Of the total mass washed off, 80% washed off in the first 30 mm (∼40 min) of rainfall for most herbicides. Little herbicide remained on the trash after rainfall, implying nearly complete washoff.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121347	Herbicides II			Price

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