Weed Watch: Kochia

 

Kochia

Kochia is one of the earliest summer annual broadleaf weeds that germinates in the spring — and it continues to germinate throughout the growing season.1

 

Kochia is notorious — for being a troublesome weed across the Great Plains and western U.S.1,2

 

This problematic weed is known to reduce soybean yields by 30% 3

 

Young Plants

Distinguishable by their small rosette shape, young plants also have lance-shaped, pale green leaves that are covered in hairs.4

 

Mature Plants

Kochia can grow to a bushy plant, up to 6 feet high.1,5

 

Seed Pain Points

Seeds are numerous as — each plant can produce up to 30,000 SEEDS, which can germinate at shallow depths within 2-3 hours and stay viable in the soil for up to two years.1,6

The evolution of herbicide-resistant and tough-to-control kochia is rapid, and short-term weed control for one season using one herbicide site of action won't do the job of preventing the addition of resistant seeds to the soil bank. Controlling kochia requires a long-term strategy that includes using residual herbicides with overlapping sites of action in a diversified weed management program.1,2

Keys to Managing Kochia1,2

  1. Rotate crops

    to diversify herbicide programs and weed control strategies.

  2. Start clean

    with a burndown herbicide or tillage.

  3. Apply a pre-emergence residual application,

    using a residual product within 2 weeks before planting or prior to crop emergence.

  4. Apply a postemergence application to target small weeds early,

    before weeds grow taller than 4 inches.

  5. Prevent Seed Production.

    If weeds escape, use tillage or physically remove them before plants produce seed.

1 Take Action. United States Soybean Board (Oct. 21, 2019). Kochia. Retrieved from http://www.iwilltakeaction.com
2 CropLife Staff, CropLife Media Group (September 13, 2017). 5 keys to managing kochia in soybeans. Retrieved from http://www.croplife.com
3 Kumar, V. Jha, P., Jugulam, M., Yadav, R., Stahlman, PW. (2019). Herbicide-resistant kochia (Bassia scoparia) in North America: A Review. Weed Science 67:4-15. doi: 10.1017/wsc 2018.72
4 University of California Agriculture & Natural Resources, Statewide Integrated Pest Management Program (Oct. 21, 2019). Kochia (kochia scoparia). Retrieved from http://www.ipm.ucanr.edu
5 Lym, R., North Dakota State University (September 2018). Identification and control of invasive and troublesome weeds in North Dakota. Retrieved from http://www.ag.ndsu.edu
6 Schwinghamer, T.D., Van Acker, R.D. (2008). Emergence timing and persistence of kochia (kochia scoparia). Weed Science 56:37-41

The System Proven to Fight the Toughest Weeds

Tough-to-control weeds like Kochia can cause significant damage to your yield. See how Roundup Ready® Xtend Technology stacks up against competitors when controlling Kochia and more.
See the Comparison

No dicamba may be used in-crop with seed with Roundup Ready® Xtend Technology, unless and until approved or specifically permitted, and no dicamba formulations are currently registered for such use in the 2024 season. Please follow www.roundupreadyxtend.com/pages/xtendimax-updates.aspx for status updates.

Based on court ruling and EPA Existing Stocks Order* on XtendiMax® herbicide registration, Bayer has stopped its sale and distribution of XtendiMax® Herbicide. Visit our XtendiMax herbicide updates page to learn the latest.

*Low-volatility dicamba products subject to the ruling include XtendiMax® herbicide with VaporGrip® Technology, Engenia® herbicide and Tavium® Plus VaporGrip® Technology herbicide.

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XtendiMax® herbicide with VaporGrip® Technology is part of Roundup Ready® Xtend Technology, is a restricted use pesticide and must be used with VaporGrip® Xtra Agent (or an equivalent Volatility Reduction Adjuvant). For approved tank-mix products (including VRAs and DRAs), nozzles and other important label information visit XtendiMaxApplicationRequirements.com

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Performance may vary, from location to location and from year to year, as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower’s fields.

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