Method of improving tolerance of plants to herbicides using seed insecticide treatments


About half of the rice planted in Arkansas is tolerant to applications of the herbicides Newpath (imazethapyr) and Beyond (imazamox). The remainder is susceptible to injury if Newpath or Beyond is somehow applied to the field either through tank-contamination or drift application.  In addition, Roundup Ready soybeans grown in close proximity to rice means that rice can sometimes be exposed to drift rates of Roundup, causing yield loss depending on rate and timing of exposure.

In the course of related research, University of Arkansas System Division of Agriculture scientists discovered that some insecticide-treated rice plots displayed a level of tolerance to an accidental herbicide drift from an adjacent field.  It occurred to them that the ability to ‘safen’ rice to herbicide drift or injury from other herbicides would be a valuable benefit for rice producers.

Subsequently, our team of entomologists and weed scientists has demonstrated that certain insecticide seed treatments of rice will protect rice seedlings from exposure to certain herbicides.

Such technology include treating rice seeds with an insecticide prior to planting making the rice more resistant to drift of post-emergence herbicides. Also the insecticide treatment could allow applications of low levels of herbicide to rice which does have natural or engineered resistance without harming yield potential. This ultimately may result in novel combinations of herbicides for effective weed control in rice.   


Patent Information:
App Type Country Serial No. Patent No. File Date Issued Date Expire Date
Provisional United States 62/142,160 4/2/2015   4/2/2016
Plant Agriculture
For Information, Contact:
Bryan Renk
Associate Director for Technology Commercialization
University of Arkansas TCO
Gus Lorenz
Robert (bob) Scott
Jason Norsworthy
Jarrod Hardke
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