LITTLE ROCK — The most widely used publications from the University of Arkansas System Division of Agriculture have been updated for 2025 with the latest research-based recommendations for managing weeds, disease and pests in row crop agriculture, as well as fruit, vegetable and garden production.
The 2025 publications include:
MP44 — Recommended Chemicals for Weed and Brush Control: https://www.uaex.uada.edu/publications/mp-44.aspx
MP144 — Insecticide Recommendations for Arkansas: https://www.uaex.uada.edu/publications/mp-144.aspx
MP154 — Arkansas Plant Disease Control Products Guide: https://www.uaex.uada.edu/publications/mp-154.aspx
GUIDES — The University of Arkansas System Division of Agriculture's most popular guides have been updated for 2025. UADA design
Copies of guides are available at county extension offices at no charge. Digital copies of the guides, along with other extension publications, are available online at https://www.uaex.uada.edu/publications/new.aspx.
“MP” stands for “miscellaneous publication.” Extension faculty update the guides annually to ensure that Arkansas growers and producers have the most current research-based information when making decisions. The guides are the Division of Agriculture’s most requested publications, with more than 18,500 copies of the guides delivered to county extension offices earlier this month.
“Our comprehensive series on agrichemicals to control weeds, insects, and plant diseases helps put the right options in the hands of farmers, growers and homeowners,” said Shane Gadberry, associate vice president for agriculture and natural resources for the Division of Agriculture. “Information in the guides is supported by trial data and product label information.”
Weed management
MP44, “Recommended Chemicals for Weed and Brush Control,” is the most requested publication and is a must-have resource for anyone using herbicides for weed control in Arkansas.
“New information is included on herbicide-resistant weed species and management practices, as well as an updated map of Palmer amaranth resistance in Arkansas including counties where multiple-resistant populations have been identified,” said Tom Barber, extension weed scientist for the Division of Agriculture. “In addition, information and links for updates on the Endangered Species Act mitigation measures and herbicide strategy are provided.”
MP44’s forage section reflects changes in recommended application timing, said Hannah Wright-Smith, extension weed specialist. “Notable changes include earlier applications of 2,4-D to control buttercup and a recommended fall/ winter application of Rezilon with a Feb. 15 cutoff date.”
The guide’s sections on cotton and soybean sections also have updated, said Bob Scott, extension weed scientist.
“I always recommend that users of these publications throw away their old ones and get the current copy to avoid any off-label or out-of-date recommendations,” Scott said.
Insect management
MP144, “Insecticide Recommendations for Arkansas,” contains information on recommended insecticides in row crops, animal agriculture, fruits, nuts, vegetables and household pests.
“Our stored grain section has been expanded to include insecticide performance ratings for many of the recommended products based on research funded by the Arkansas Corn and Grain Sorghum Promotion Board,” said Glenn Studebaker, extension entomologist and integrated pest management coordinator for the Division of Agriculture. “This year we have included a new treatment threshold for tarnished plant bug in ThryvOn cotton varieties.”
“For tarnished plant bug in ThryvOn cotton, the nymph threshold has doubled to six nymphs on five row feet. This is only for cotton with ThryvOn technology,” extension entomologist Nick Bateman said. “Non-ThryvOn cotton thresholds will continue to be three nymphs on five row feet. Additionally, our rice stink bug threshold in rice was moved to 10 stink bugs on 10 sweeps throughout the whole season. Studies have been conducted for multiple years to confirm these thresholds and will help growers make a more economically sound decision when treating these insects.”
The mobile-friendly edition of MP 144 is available at https://mp144.uada.edu/.
Plant disease management
The “Arkansas Plant Disease Control Products Guide” — or MP 154 — includes a list of fungicides and nematicides registered for use in Arkansas that are used to control diseases of row crops, vegetables, small fruits, turfgrass and ornamental plants.
“All products are registered for use in the state,” said Travis Faske, extension plant pathologist. “Each year new products are added, and fungicide efficacy tables in corn, soybean, and wheat are updated.”
Information in the guide is generated by extension plant pathologists who conduct applied research trials across the state.
To access more Division of Agriculture publications, visit https://pubs.uada.edu/ or contact your local Cooperative Extension Service agent or visit www.uaex.uada.edu. Follow us on X and Instagram at @AR_Extension. To learn more about Division of Agriculture research, visit the Arkansas Agricultural Experiment Station website: https://aaes.uark.edu. Follow on X at @ArkAgResearch. To learn more about the Division of Agriculture, visit https://uada.edu/. Follow us on X at @AgInArk.