The Enid News and Eagle, Enid, OK

Ag

November 17, 2012

Musk thistle control works better in fall

ENID, Okla. — For the last three years, I have received a phone call from the same two individuals wanting to control musk thistle in May.

Each of those years and to each individual, I have discussed the limits of our success with trying to control musk thistle in the spring time. In our discussion, I always refer to our control options in the fall being better than in the spring and our options for products to control musk thistle being much broader. For those two individuals and other wanting to control musk thistle in the spring, please read this article.

Last week when the wind was much calmer than at the end of week, I got the chance to walk several wheat fields and evaluate the crop status. While out of the office, I got to look at several sites that to my surprise had more musk thistle than what I wanted to see. My first thought was that we had been too dry for musk thistle to get that much growth. Some of the rosettes were 6 inches or better in size.

There should not be a way that these could have gotten enough rain to have that kind of size. I then had to remember that musk thistle is considered in most weed book to be a bi-annual, which means it will spend two growing seasons in the rosette stage and then bolt to producer seeds in the second year of its life. The growth I was looking at last week were plants that had germinated last fall when moisture conditions were much more favorable than this summer and fall. Again, you have to understand the growth cycle of the weeds that are causing you problems to gain better understanding of how to control them.

Musk thistle is much easier to control in the rosette stage than when they have a seed stalk that you have to contend with. Herbicides that work well when musk thistle is in the rosette stage include 2,4-D, Grazon Next, Grazon P+D. Ally, Cimarron Max and a combination of 2,4-D and Banvel. The best time to utilize these products would be in the month of November when moisture conditions are favorable and the daytime temperatures exceed 60 degrees.

The before-mentioned herbicides used during the fall time frame have much less affect on other plants that may be much more susceptible to these herbicides in the spring it they go off target. For example, if you were to use these products in the spring time, you would have to be careful of crops like soybean or alfalfa and peppers and tomatoes in gardens near your spray locations. This scenario also holds true for landscape plants like oak trees, redbuds and pink velour crape myrtles.

Your Oklahoma Cooperative Extension Service ag educator will be able to address your questions concerning control options and timing of applications for the musk thistle problems that you are facing. If you do not have time this fall for the ideal spray time, the spring time applications can be made, but if the musk thistle gets a seed stalk on it, I will remind you of this article next spring and ask you why the fall or early spring time applications were not utilize.

Gribble is Oklahoma Cooperative Extension Service northwest area agronomist.

1
Text Only
Ag
  • farm - Rick Nelson web.jpg Wheat tour to provide crop information

    Damage to wheat from the recent freeze will depend on growth stages and temperatures. It will take approximately seven to 10 days following a freeze to determine damage.

    April 19, 2014 1 Photo

  • FFA logo.jpg Drummond students receive honors

    Several members traveled to Alva for the Northwestern Oklahoma State University Interscholastic Contest.

    April 19, 2014 1 Photo

  • farm - garber ffa web.jpg Garber FFA members place in speech contests

    The Ag 1 quiz bowl team placed fourth and qualified for state. On the second day of the event, the animal science quiz bowl team placed second and qualified for state.

    April 19, 2014 1 Photo

  • Danna Zook cutout web.jpg Producers need to consider cow supplements

    Springtime for many Oklahoma producers often means calving time.

    April 12, 2014 1 Photo

  • Master Gardener logocmyk.jpg It’s time to dirty hands

    Bees are venturing out to visit the new flowers. Keep a close watch on your garden. Often, helpful pest-destroying insects are out, getting ready to work for you, also. These, and the bees helpfully pollinating flowers, shouldn’t be discouraged by the undiscriminating spraying of insecticides.

    April 12, 2014 1 Photo

  • farm - 4H web.jpg 4-H’ers meet with state lawmakers

    Sen. Eddie Fields spoke to the group upon their arrival at the Capitol.

    April 12, 2014 1 Photo

  • Canola tour to have stops in area

    The tour will be held at the canola field of Flying G Farms located 91⁄2 miles west of Orienta on U.S. 412 and then north into the field.

    April 12, 2014

  • farm - Rick Nelson web.jpg Money up front can mean bigger returns later

    Implants are a safe, effective technology that typically offer a 10-to-1 return on investment.

    April 5, 2014 1 Photo

  • FFA logo.jpg 9 area students to receive WLC program scholarships

    FFA members will tour our nation’s capital, visit with members of Congress and perform a service learning project within the Washington area, while building friendships with fellow FFA members from across the nation.

    April 5, 2014 1 Photo

  • FFA logo.jpg NW Oklahoma FFA members named proficiency finalists

    Three finalists are selected in each of 49 agricultural proficiency award categories. The state winner in each area will be announced April 30 during the 88th State FFA Convention held at the Cox Convention Center in Oklahoma City.

    April 5, 2014 1 Photo

Featured Ads
Facebook