Kochia

Kochia

Category

Description

Kochia (Bassia scoparia) is an invasive weed native to Eurasia that causes substantial agricultural issues at
the global scale. Kochia has a wide range of appearances in color (green, red or purple), height (tall/short),
width (skinny/round), and leaf shape (wide/narrow). The variety of observable biotypes shows the incredible
genetic diversity within this weedy species. Added to the list is rapid growth and prolific seed production;
kochia outcompetes native vegetation and reduces crop yields across multiple climates and soil types. Weed
management practices that occur early in the season (spring tillage and herbicide burndown) have pushed
some kochia biotypes to appear later in the season, expanding kochia’s emergence window.

Herbicide resistance in kochia continues to be a struggle for farmers, which first began in the 1980s, shortly
after the introduction of ALS-inhibitors (Group 2). The list of resistances keeps growing for kochia and so
does the distribution of kochia populations that contain resistance to multiple herbicide groups. In North
Dakota, there are confirmed resistances of kochia to Groups 2, 4, 5, 9, and newly reported 14
herbicides. Knowing what types of herbicide resistance exists in the field can help with weed management.

Genetic screening for herbicide-resistant markers offers a promising tool for farmers in managing kochia
infestations. By identifying specific genetic traits associated with herbicide resistance, farmers can make
informed decisions about herbicide selection and application, optimizing weed control efforts while
minimizing the risk of further resistance development.

Advantages of genetic tests:

•   Rapid screening for Groups 2, 9, and 14 resistances

•   Early detection of resistance

•   Test across all growth stages and seasons

•   Effortless sample collection – just two leaves/plant

Results can help:

•   Optimize herbicide selection

•   Improve weed management

NAGC has expanded the current herbicide resistance tests to include kochia plants. Are you interested in
getting your weeds tested? More information regarding collection instructions, submission forms, and prices
are listed below based on a submitter’s residency.

North Dakota Residents

Collection Instructions and Submission Form can be found here: ND Residents Collection Instructions and Submission Form

Prices: Thanks to ND Soybean Council and ND Corn Utilization Council, testing fees are covered for up to
1,000 samples from North Dakota residents until June 2025. Funding for test development was also provided
through a North Dakota Department of Agriculture, Specialty Crop Block Grant.

Test Result Information: Results will be sent to only the email addresses listed on the submission form by
an automated system (noreply@nagc.limsplus.com). No personal information or exact locations will be
released to the public. Standard turnaround for results is 7 days from arrival at NAGC.

Non-North Dakota Residents

Collection Instructions can be found here: non-ND Residents Collection Instructions

Submission Form can be found here: non-ND Residents – Submission Form

Prices: Prices vary based on weed and requested markers. All three tests can be bundled together for
$195/sample regardless of sample type.

Marker Pigweed (Individual Test) Kochia (Individual Test) All Three Tests (Pigweed or Kochia)
ALS $75/sample $75/sample $195/sample
EPSPS $75/sample $75/sample
PPO $75/sample $135/sample

Test Result Information: Results will be sent to only the email addresses listed on the submission form by
an automated system (noreply@nagc.limsplus.com). No personal information or exact locations will be
released to the public. Standard turnaround for results is 7 days from arrival at NAGC.

Contact Us For More Information