May 17, 2006
Department of Agriculture has announced U.S. Environmental
Protection Agency approval of a section 18 emergency exemption
allowing Lumax herbicide use on grain sorghum in Kansas, said
Dave Regehr, Kansas State
University Extension weed management specialist.
Lumax is a product of
Syngenta. When applied
according to the label and after proper activation, this
herbicide controls annual grass (excluding shattercane) and
broadleaf weeds in grain sorghum, including triazine-resistant,
glyphosate-resistant, and ALS-resistant Palmer amaranth and
waterhemp, Regehr said.
There are special conditions
pertaining to Lumax use on sorghum, he said.
“The section 18 is an
indemnified label, meaning that end users must accept all
responsibility for failure to perform and for crop damage from
Lumax use on sorghum,” the agronomist said. “Applicators must be
in possession of the label at the time of application. The label
can be accessed online at
www.farmassist.com only after indicating acceptance of
liability. Applicators without internet access will need to
obtain the label from their retailer, who will walk them through
To access the Lumax on sorghum
1) Go to
http://www.farmassist.com Web site.
2) If a first-time user, register as a new user.
3) On the left side of the screen, select Products, then
4) Near the top of the ensuing screen, click the “here”
which will bring up a page called “My Product Labels.”
Select “Section 18,” State: “Kansas,” Product: “Lumax,” and
Crop Groups “Sorghum.” On the ensuing screen, locate the
“For Use On” section and select “Sorghum.” This will bring
up the Waiver of Liability and Indemnification Agreement.
5) If you choose to accept this agreement, scroll to the
bottom and click “Accept.” On the next page, under the
heading “My Product Labels,” you’ll find a link titled
“Lumax Section 18 Indemnified Label on Sorghum.” Click on
that link to download the pdf section 18 Lumax label.
“If producers have trouble
getting the label, they should be sure they did not miss Step
4,” Regehr said. If they’ve tried these steps and still have
problems, he suggested they call the Syngenta Customer Resource
Center at 1-866-796-4368.
The label spells out use
directions, Regehr said, including:
- Apply at the rate of 2.5
quart Lumax per acre.
- Make applications 7 to 14
- Use Concep III-treated
grain sorghum seed only (not forage sorghum or sudangrass)
- Minimize disturbance of
the herbicide-treated soil barrier at planting.
- If emerged weeds are
present, the label has recommendations adjuvant to improve
- Do not apply to emerged
- Do not apply on
If a Lumax-treated sorghum crop
is lost to a natural disaster, grain sorghum may be replanted
immediately, Regehr said. In that event, producers should see
the federal label for Lumax on corn (http://www.cdms.net/manuf/manuf.asp)
for crop rotation guidelines and weed response tables, he
Regehr advised that adequate
precipitation is needed for activation.
“Approach Lumax on sorghum with
caution,” he added. “Lumax has been tested on grain sorghum
largely under optimum conditions. As with any new herbicide, we
should expect some surprises.”
Research and Extension is a short name for the Kansas State
University Agricultural Experiment Station and Cooperative
Extension Service, a program designed to generate and distribute
useful knowledge for the well-being of Kansans. Supported by
county, state, federal and private funds, the program has county
Extension offices, experiment fields, area Extension offices and
regional research centers statewide. Its headquarters is on the
K-State campus, Manhattan.