The effect of spray volume on spray partitioning between plant and soil |
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Authors: | G B Shaw R B McKercher R Ashford |
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Institution: | (1) Department of Crop Science and Plant Ecology, University of Saskatchewan, S7N OWO Saskatoon, Canada;(2) Department of Soil Science, University of Saskatchewan, S7N OWO Saskatoon, Canada |
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Abstract: | Summary Applications of chlorsulfuron (11.25 g ai ha−1) were made to wheat, flax, canola and lentils at spray volumes of 48, 108 and 2171 ha−1, and with metsulfuron methyl (6.00 g ai ha−1) at spray volumes of 48 and 2171 ha−1. Applications were made to the shoot only, the soil only and to the plant plus soil. Spectrofluorometric analysis was used
to determine spray partitioning within the plant-soil system and foliar retention was related to efficacy. Fresh and dry weights
of shoot material were determined 3 weeks after treatment. Flax and wheat were more tolerant of restricted-foliar applications
than those made to the soil, the converse being true to canola and lentils. Applications made to the plant and soil were always
the most deleterious. Foliar retention and efficacy did not correlate directly. Applications in 2171 ha−1 were generally more efficacious than those at 481 ha−1. |
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Keywords: | Chlorsulfuron Herbicide Metsulfuron methyl Postemergence applications Spectrofluorometry Spray partitioning Spray volume |
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