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  2. Preemergent herbicide - Wikipedia

    en.wikipedia.org/wiki/Preemergent_herbicide

    If applied when preemergent herbicide is needed, the fertilizer may burn or stress the lawn. If applied after the lawn "green-up", weed seeds will have already germinated and the herbicide will be ineffective. [3] Preemergants do not prevent seeds from germinating, they prevent cell division, and prevent vital parts of the weed from forming

  3. Pendimethalin - Wikipedia

    en.wikipedia.org/wiki/Pendimethalin

    Pendimethalin is a K1-group (in Australia group D, or numerically group 3) according to the Herbicide Resistance Action Committee (HRAC) classification and is approved in Europe, North America, South America, Africa, Asia and Oceania for different crops including cereals (wheat, barley, rye, triticale), corn, soybeans, rice, potato, legumes ...

  4. Trifluralin - Wikipedia

    en.wikipedia.org/wiki/Trifluralin

    Trifluralin is a common pre-emergent selective herbicide, a dinitroaniline.With about 14 million pounds (6,400 t) used in the United States in 2001, [3] and 3–7 million pounds (1,400–3,200 t) in 2012, [4] it is one of the most widely used herbicides.

  5. This is where pre-emergence herbicide comes into play. Pre-emergence herbicides are applied to lawns prior to weed seed germination. Our standard recommendations are Sept. 1-15 for cool season ...

  6. Atrazine - Wikipedia

    en.wikipedia.org/wiki/Atrazine

    It is used to prevent pre-emergence broadleaf weeds in crops such as maize (corn), [3] soybean [3] and sugarcane and on turf, such as golf courses and residential lawns. Atrazine's primary manufacturer is Syngenta and it is one of the most widely used herbicides in the United States, [2] Canadian, [4] and Australian agriculture. [5]

  7. You need to use preemergence herbicides now. Soil temperatures are on the rise, meaning seeds for summer weeds soon will start to germinate. You need to use preemergence herbicides now.