Rural Reflections: Texas wedding and S.D. weeds by Connie Sieh Groop, Farm Forum Editor After celebrating with our daughters and family the first week of July, Dale and I flew with my mom to Texas for my sister’s son’s wedding. In meeting the family of my nephew’s wife, we visited a ranch near Ha

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My five-day absence gave the weeds in my garden a great opportunity for growth. While potatoes, beets, beans and peas look great, I noticed that the tomatoes and peppers were yellow and drooping. While putting down cardboard to block the weeds worked well, I forgot how persistent creeping jenny (field bindweed) can be. Some of the tendrils snuck under the paper and wound around the stalks of some of the plants, pulling tight to create a stranglehold. Sneaky weed!

In some of the open areas, wireweed and purslane also flourish. Everything seems a bit dry, so a rain would have been helpful to pull out some of those persistent, many-fingered pests. Guess that’s why I need to use the hoe to take care of some of those areas. It’s always a good feeling to see a mound of weeds dying in the sun while I carry in baskets of produce into the house.

Widespread trouble

When checking fields, Dale said they’ve noticed some glyphosate resistant kochia in our area. According to, this resistant plant first was confirmed in South Dakota in the Gettysburg area in 2009. A few additional cases were confirmed in 2010 and 2011. In 2012, resistant populations seemed to expand greatly, and it appears to exist in Tripp County.

Mike Moechnig, SDSU Extension Weed Specialist, suggests strategies for glyphosate resistant kochia. A burndown herbicide program that includes foliar and soil residual activity may greatly minimize plants emerging later in the season. A soil residual herbicide will be necessary to control glyphosate resistant kochia in soybeans. It will be important to aggressively control kochia in rotational crops such as corn or wheat. Kochia will not likely be eradicated from a field, but greatly depleting the seed bank may allow adequate control.

Kochia seed has almost no dormancy, according to the website. It may be possible to aggressively manage these weeds in rotational crops such as corn or wheat, deplete the seed bank, and then manage these weeds with preemergence herbicides in Roundup Ready soybeans and a glyphosate tank mix partner if necessary.

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