3/21/2023 0 Comments Springit spray![]() ![]() A member of the mint family, in early spring it will quickly fill an empty space with a mat-like cover of small, round, scalloped-edged green leaves punctuated with delicate violet-blue flowers. Since marestail is one of the toughest weeds to kill in-crop, make sure you wipe it out before you plant.Creeping Charlie- Glechoma hederacea, also commonly known as ground ivy-is an insidious weed that is both resilient and adaptable, making it very difficult to control. In-crop is not normally a problem in spring wheat due to crop canopy.Ī final piece of advice: DO NOT PLANT INTO EXISTING STANDS OF MARESTAIL THIS SPRING. Use the labeled additives for your area to get the most activity out of it. Wheat – Sharpen makes a great burndown product in front of grass crops like wheat. The challenge in some areas of the country is marestail is becoming both ALS-resistant and glyphosate-resistant, so Roundup, FirstRate, and Classic can’t control it. Otherwise, you could use some Classic with a post-emerge application. For that reason, you may save the FirstRate for in-crop help on late-emerging marestail and ragweed. Both contain FirstRate, which is probably your best choice for some in-crop help later. ![]() Authority First or Sonic are good options as pre-emerge products. Sencor can cause crop response in sandy soils and high pH situations, so use caution. Sencor is a nice option at rates up to 1/3 pound per acre. Soybeans – Sharpen is a good helper, but you can’t safely use the 2 to 3 ounces you’d need to take down marestail with Sharpen alone. In-crop, 2,4-D is definitely too hard on corn, especially when that corn is worth $5 a bushel. Banvel is a safer burndown option, and it doesn’t cost any more per acre than 2,4-D. 2,4-D is not a good spring option ahead of corn, either in-crop or as a burndown. Banvel at 16 ounces plus a surfactant provides the most economical control, but Status has better crop safety. Status at the highest labeled rate provides the best control in-crop, in my opinion. The dicamba products have always been decent, too. Be sure to use the proper adjuvants, and you’ll be amazed by the speed of control. Verdict contains a high rate of Sharpen (Kixor). I view 29 ounces of Ignite as a minimum rate.Ĭorn – My favorite choice for a pre-emerge burndown is a full rate of Verdict. Ignite as a burndown or in LibertyLink crops is an excellent option and can be tankmixed with other herbicides for even more kick. Herbicides to use this spring (keep in mind that larger weeds may require higher rates): Your herbicide application will normally start killing the most active growing points at the top of the plant and work its way down until either the plant is dead or the herbicide runs out. To be successful, you need to kill every growing point. If you’re trying to spray it in the spring, it will already have a big taproot and multiple growing points. ![]() It’s important to remember that if the marestail is big in the spring, it is most commonly a winter annual plant, meaning it got a start in the fall. You didn’t apply the right product at the right time or you didn’t apply a high enough rate. What if I sprayed something on the marestail and it just burned off the leaves at the top and the weed eventually re-grew? The answer why this happened is simple. WeatherMAX applied (left to right, both front and back rows) at rates of 0 oz., 22 oz., 44 oz., and 66 oz. Roundup-resistant marestail from Beresford, SD (back row) compared to control ‘susceptible’ variety (front row). ![]()
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