Im now using more glyphosate to manage weeds; have I got resistance?
Changes in farming practices, like the adoption of reduced tillage methods, often result in changes in the herbicide rate required to achieve total weed control. This is also the case for knockdown herbicides like glyphosate. The use of higher rates of knockdown herbicides to achieve complete weed control does not infer herbicide resistance or that resistance is beginning to occur. If resistance is suspected, herbicide resistance testing can confirm any resistance levels relative to known susceptible populations (see GSWG guide on what to do if glyphosate resistance is suspected).
