Effect of diquat paraquat and glyphosate on pre harvest drying of wheat triticum aestivum cultivar neepawa

Clarke, J.M.

Canadian Journal of Plant Science 61(4): 909-914


ISSN/ISBN: 0008-4220
Accession: 005234348

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Three chemicals, each applied at 2 rates, were evaluated for use as preharvest desiccants in 'Neepawa' wheat over 3 yr. Diquat and paraquat were tested at rates of 0.2 and 0.4 kg/ha, while glyphosphate was applied at 0.5 and 1.0 kg/ha. The rates of drying of the grain and straw in desiccant-treated plots were compared with those of untreated standing and windrowed controls. Precipitation differed during the sampling period in each year, but did not influence the effectiveness of the desiccants. Rate of drying of both grain and straw was highest in the windrowed treatment. None of the chemical desiccants, applied when grain moisture content was 43% or less, reduced grain or straw moisture faster than the untreated standing control in any of the 3 yr. [Chemical desiccants have been investigated as harvest aids in cereal crops to speed drying.].