Take dandelions out of the equation as early as possible, ideally before you even plant your crop. Unfortunately, in a pre-seeding burnoff, dandelion is one of those tough weeds that often seem to shrug-off a straight glyphosate application.
Dandelions are like a number of weeds that are best controlled in an out-of-crop application. It’s best if the herbicide is translocated down in the root system along with sugars in the fall when the weed begins to prepare itself to survive the winter. If you don’t get them in the fall, then an early spring application is definitely in order.
In some specific situations in Eastern Canada– like to control dandelions in the spring – a residual herbicide can boost the effectiveness of glyphosate substantially.
For everything from no-till to min-till to vertical tillage, an inexpensive pre-plant glyphosate treatment provides valuable control of perennials and winter annuals that may be present. Adding a residual herbicide at the same time extends the weed-free period and can eliminate a second pass with the sprayer in some cases.
Guardian Max herbicide shows strong performance in keeping dandelion at bay for extended periods, even into the following spring which is really beneficial for growers who no-till wheat directly into IP soybean stubble.
Guardian Plus II will give you that same outstanding dandelion control, plus Eastern black nightshade and herbicide resistant (triazine and Group 2) pigweeds and lamb’s-quarters.