first_imgShare Facebook Twitter Google + LinkedIn Pinterest Even small early weeds can hurt crop yields, especially marestail. So it’s important to get a head start on controlling those early weeds, especially, if they are herbicide resistant. Some facts about early emerging weeds and tips on their control are given below:• There are many early emerging weeds but the main one to scout for is mares tail, which is also known as horseweed. Herbicide resistant populations of marestail are becoming harder to control in some areas.• According to the University of Nebraska, marestail seeds can germinate on the surface and thrive in no-till fields. Each marestail plant can produce up to 200,000 seeds which are mainly spread by wind. So even if you did not have marestail in your fields before but your neighbor had, you should scout your fields before planting so you are not surprised later.• In the fall, marestail produces non-dormant seeds that germinate and form an over-wintering rosette. Seeds can also survive over winter and germinate the next spring. Studies have shown that fall emerging marestail seedlings tend to experience higher mortality rates.• Marestail starts off as a small rosette and is difficult to see if it is covered by crop residue. Small rosettes can hide between mature soybean plants in the fall, under the soybean residue and resume growth in the spring.• Since marestail seeds can germinate in the fall as well as in the spring, scouting is also recommended for fields that were sprayed in the fall. Marestail is most susceptible to herbicides when still in the rosette stage before bolting. So, for proper marestail management, burndown along with residual herbicides should be used to control established plants and to suppress the ones that are yet to emerge.last_img

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