Pick up know-how for tackling diseases, pests and weeds.
Farm bill, farm marketing, agribusiness webinars, & farm policy.
Find tactics for healthy livestock and sound forages.
Scheduling and methods of irrigation.
Explore our Extension locations around the state.
Commercial row crop production in Arkansas.
Agriculture weed management resources.
Use virtual and real tools to improve critical calculations for farms and ranches.
Learn to ID forages and more.
Explore our research locations around the state.
Get the latest research results from our county agents.
Our programs include aquaculture, diagnostics, and energy conservation.
Keep our food, fiber and fuel supplies safe from disaster.
Private, Commercial & Non-commercial training and education.
Specialty crops including turfgrass, vegetables, fruits, and ornamentals.
Find educational resources and get youth engaged in agriculture.
Gaining garden smarts and sharing skills.
Timely tips for the Arkansas home gardener.
Creating beauty in and around the home.
Maintenance calendar, and best practices.
Coaxing the best produce from asparagus to zucchini.
What’s wrong with my plants? The clinic can help.
Featured trees, vines, shrubs and flowers.
Ask our experts plant, animal, or insect questions.
Enjoying the sweet fruits of your labor.
Herbs, native plants, & reference desk QA.
Growing together from youth to maturity.
Crapemyrtles, hydrangeas, hort glossary, and weed ID databases.
Get beekeeping, honey production, and class information.
Grow a pollinator-friendly garden.
Schedule these timely events on your gardening calendar.
Equipping individuals to lead organizations, communities, and regions.
Guiding communities and regions toward vibrant and sustainable futures.
Guiding entrepreneurs from concept to profit.
Position your business to compete for government contracts.
Find trends, opportunities and impacts.
Providing unbiased information to enable educated votes on critical issues.
Increase your knowledge of public issues & get involved.
Research-based connection to government and policy issues.
Support Arkansas local food initiatives.
Read about our efforts.
Preparing for and recovering from disasters.
Licensing for forestry and wildlife professionals.
Preserving water quality and quantity.
Cleaner air for healthier living.
Firewood & bioenergy resources.
Managing a complex forest ecosystem.
Read about nature across Arkansas and the U.S.
Learn to manage wildlife on your land.
Soil quality and its use here in Arkansas.
Learn to ID unwanted plant and animal visitors.
Timely updates from our specialists.
Eating right and staying healthy.
Ensuring safe meals.
Take charge of your well-being.
Cooking with Arkansas foods.
Making the most of your money.
Making sound choices for families and ourselves.
Nurturing our future.
Get tips for food, fitness, finance, and more!
Understanding aging and its effects.
Giving back to the community.
Managing safely when disaster strikes.
Listen to our latest episode!
By Mary Hightower
U of A System Division of Agriculture
STUTTGART, Ark. -- A string of hot and steamy nights has led to an increase in both
bacterial panicle blight and sheath blight in Arkansas’ rice crop.
“In the last couple of weeks, we got rain without a substantial decrease in day or
night temperatures,” said Yeshi Wamishe, extension rice pathologist for the University
of Arkansas System Division of Agriculture. “Although it appeared good for the rice
crop, the conditions seemed to favor the development of both bacterial panicle blight
and sheath blight.”
She said that the bacteria that causes the panicle blight are largely seedborne, following
the rice canopy upward until heading. Chemicals are not used to manage this disease.
“However, rain, particularly windy rain, plays a significant role in the spread of
the bacteria and in the intensity of symptoms – assuming the infected plants are a
susceptible variety,” she said.
When looking for bacterial panicle blight, growers should use caution “since there
are other factors that can cause similar symptoms,” Wamishe said. “For symptom confirmation,
contact your county agent.”
After a very slow start in July, Wamishe said that “in a short time under the prevailing
high heat and humidity, sheath blight is picking up both vertically and horizontally.
Therefore, it is important to scout and take timely action.”
She said that fungicides were not recommended for sheath blight after the rice heads
“Please take the 28 days pre-harvest index into consideration before deciding on a
late fungicide application for sheath blight,” Wamishe said. “Studies have shown that
more than one fungicide application to manage sheath blight has not proven profitable.”
The frequent rain has also been favorable for development of rice blast – an unpredictable
disease that has a talent for surviving in a variety of conditions. Wamishe said the
timing and frequency of fungicide applications is important in managing this disease.
“Neck blast can cause near 100 percent grain yield loss,” she said. “Due to the airborne
nature of the blast pathogen, the absence of leaf blast early in the season does not
guarantee the absence of neck or panicle blast later in the season.”
Different varieties of rice have different susceptibility levels to neck and leaf
blast and that puts a premium on “being ahead of the pathogen about timing of fungicide
application,” Wamishe said. “Once the panicle necks are full out of the panicle booth,
we cannot go back. It’s already too late.”
For more information about rice production contact your county extension office or
visit www.uaex.uada.edu, aaes.uark.edu or uada.edu.
The University of Arkansas System Division of Agriculture offers all its Extension
and Research programs and services without regard to race, color, sex, gender identity,
sexual orientation, national origin, religion, age, disability, marital or veteran
status, genetic information, or any other legally protected status, and is an Affirmative
Action/Equal Opportunity Employer.
# # #
Media Contact: Mary HightowerDir. of Communication ServicesU of A Division of Agriculture(501) email@example.com