Article ID Journal Published Year Pages File Type
4506965 Crop Protection 2008 6 Pages PDF
Abstract

Tolerance of white bean to the pre-emergence application of imazethapyr at the dose of 0, 25, 50, 75, 150 and 300 g ai ha−1 was studied at 11 Ontario, Canada locations over a 3-year period. White bean tolerance to imazethapyr was dependent on dose and environmental conditions. Crop injury generally increased as the dose was increased. Imazethapyr-applied pre-emergence caused up to 62% visible injury and reduced plant height as much as 32%, shoot dry weight 48%, root dry weight 20% and yield 77%. Seed moisture content was increased as much as 1.1%. The dose of imazethapyr to cause 5%, 10% and 20% injury in white bean was as low as 17, 31 and 58 g ai ha−1 for visible injury, 36, 73 and 155 g ai ha−1 for plant height, 4, 9 and 22 g ai ha−1 for shoot dry weight, 27, 54 and 108 g ai ha−1 for root dry weight, and 10, 21 and 44 g ai ha−1 for yield, respectively. Leaf tissue potassium (K) concentration was not affected with imazethapyr at 25, 50 and 75 g ai ha−1; however, it was reduced 27% at 150 g ai ha−1 and 36% at 300 g ai ha−1. Based on these results, imazethapyr-applied pre-emergence at the currently registered dose of 75 g ai ha−1 in white bean in Ontario has the potential to cause significant crop injury and yield losses under some environmental conditions.

Related Topics
Life Sciences Agricultural and Biological Sciences Agronomy and Crop Science
Authors
, , , , ,