Senwes Scenario June/July 2018 - Page 14

AGRICULTURAL Effective weed management of glyphosate resistant weeds The factors that negatively affect its efficacy GLYPHOSATE RESISTANCE MANAGEMENT GUIDELINES ➊ Rotate glyphosate with herbicides that have different modes of action. ➋ Apply a residual herbicide before glypho- sate, or tank mix another herbicide with glyphosate. ➌ Avoid making more than two glyphosate applications to a field over a two-year period. ➍ Apply glyphosate as prescribed and at the recommended stage of weed growth as stated on the label. ➎ Use roundup-ready crops and glyphosate where they have the greatest economic and management value in your crop rotation. ➏ Use cultivation and other mechanical weed management practices. ➐ Producers should notice that utilising herbi- cides with multiple modes of action, including glyphosate, results in broader spectrum and more consistent weed control. ➑ Using pre-emergence residual herbicides before glyphosate application reduces early season weed competition and also widens the windows for your post-emergence gly- phosate application in the case of wind or rain affecting herbicide application timing. ➒ Using residual herbicides in a post-emer- gence application tank-mixed with glypho- sate will also help minimise the chances of a second flush of weeds. 12 SENWES SCENARIO | WINTER 2018