![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2023/04/Figure-1-Air-Temps-article.jpg)
In the Spring, growers may experience challenges when controlling winter annuals weeds or terminating cover crops with glyphosate-based burndown herbicide programs, specifically when glyphosate is sprayed in cool, cloudy weather conditions or tank mixed with residual herbicides, ATS, or synthetic auxins (issue mostly for grasses).