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Delta Farm Press
by Jarrod Hardke, Rice Extension Agronomist - September 1, 2023
“I’m a victim of life’s circumstances…”
It’s been moving week in rice country. Most have combines on the move and any that
don’t are jumping up and down to get started.
Yield reports continue to be nearly all positive, continuing to reflect how strong
this crop has looked throughout the majority of the season. However, the news isn’t
Milling yield reports have been underwhelming to put it mildly. Most of these reports
have come from central and south AR (where the majority of harvest has taken place
so far). Late July into early August brought more sustained periods of high nighttime
temperatures during grain fill in these areas (Fig. 3).
At this time that’s the likely scenario – high nighttime temps (HNT) can lead to thinner
kernels which can reduce total milled rice and since they’re thinner can be more prone
to breakage and lower head rice. Northeast AR didn’t experience the same levels of
HNT so there’s a chance we see some marked improvement going forward.
There is some rain in the forecast for early next week, but total amounts are forecast
to be minimal. It may slow harvest somewhat, but often small rain events can actually
help dry grain out a little quicker, perhaps improving the pace of harvest by getting
more of the crop ready.
It’s still early, with plenty to learn about this crop turns out. September is Rice
Month, and hopefully it brings us continued positive harvest conditions.
Let us know if we can help.
Fig. 1. NOAA 7-day precipitation forecast.
Fig. 2. Arkansas rice harvest progress, 2012-2023.
Fig. 3. Nighttime temperatures at selected locations in eastern Arkansas from June
15 to August 31, 2023.
Rice & Advice 8-31-23: Harvest Aids
Entomology Update 8-31-23: Late Season Clean Up for Loopers, Stink Bugs and Spider
Table 1 provides a generalized estimate of converting rice kernel counts to harvest loss.
There’s a process for arriving at an accurate average number though.
The most accurate way to do the count is to count a 10 ft2 area across the entire
header width. For a 30 ft header, that’s an area 30 ft wide x 4 inches. Not a real
feasible or convenient count to make.
Instead, it may be much more straightforward to take a few simple counts from respective
areas behind the machine.
For a 30-ft header, think of it as having three 10-ft sections. Take a single square
foot count in the center of each of these 10-ft sections. Add the three counts and
divide them by three to give you an average per square foot.
Remember to count any kernels already on the ground in an unharvested area to deduct
from your count that has already shattered on the ground.
Table 1. Converting rice field loss counts into bushels per acre.
Jason Norsworthy & Tommy Butts
As harvest gets in full swing, now is often a good time to collect samples from possible
herbicide-resistant weed populations. The primary weeds to be evaluated are barnyardgrass,
Pennsylvania smartweed, weedy rice, and white-margined flatsedge.
Barnyardgrass samples will be screened against Roundup, Command, Facet, Newpath, Regiment,
Ricestar, and Propanil.
Smartweed samples will be screened against Gambit and Regiment.
Weedy rice samples will be screened against Newpath, Provisia, and Rogue.
To submit samples:
Collect 40-50 seedheads from a field.
Place seedheads in a paper bag.
If submitting multiple samples, keep in separate, labeled bags.
Allow seedheads to dry for ~7 days.
Do not use plastic bags or sealed bags as seeds can rot.
Complete a herbicide resistance screening form for each sample (obtain at county Extension
Submit samples and forms to county Extension office.
The deadline to submit samples is Nov. 1. Results are typically ready in early March.
The DD50 Rice Management Program is live and ready for fields to be enrolled for the
2023 season. All log-in and producer information has been retained from the 2022
season, so if you used the program last year you can log in just as you did last year.
Log in and enroll fields here: https://dd50.uada.edu.
The Arkansas Rice Advisor site https://riceadvisor.uada.edu functions like an app on your mobile device. There you can readily access the DD50
program, rice seeding rate calculator, drill calibration, fertilizer and N rate calculators,
publications, and more.
Arkansas Rice Updates are published periodically to provide timely information and
recommendations for rice production in Arkansas. If you would like to be added to
this email list, please send your request to email@example.com.
This information will also be posted to the Arkansas Row Crops blog (http://www.arkansas-crops.com/) where additional information from Extension specialists can be found.
More information on rice production, including access to all publications and reports,
can be found at http://www.uaex.uada.edu/rice.
We sincerely appreciate the support for this publication provided by the rice farmers
of Arkansas and administered by the Arkansas Rice Research and Promotion Board.
The authors greatly appreciate the feedback and contributions of all growers, county
agents, consultants, and rice industry stakeholders.
Rice Extension Agronomist
Extension Weed Scientist
Rice Verification Coordinator
Extension Soil Fertility