'Herbicide Injury" tutorial builds on popular website
A cartoon character that looks suspiciously like a Department of Plant Sciences professor leads an animated, online tutorial that recently won a 2022 Gold Award from the Association for Communication Excellence. UC Davis weed experts Kassim Al-Khatib and Brad Hanson worked with the University of California Statewide Integrated Pest Management Program to create “Diagnosing Herbicide Injury,” which debuted in October 2021 on Extension Foundation Campus.
The free, self-guided course.../h2>
Root-inhibiting herbicides (like pendimethalin or trifluralin) are soil-applied and pre-plant incorporated as a standard practice for conventional processing tomatoes in the Sacramento Valley.
Earlier this year, I visited a young processing tomato field with herbicide injury on a significant amount of plants. The plants had the swelling I've seen with trifluralin injury on tomatoes and no/very little root growth above the root ball/transplant plug. They were also very brittle and easily snapped in half which can be characteristic of pendimethalin injury. Some of the affected plants had snapped at the weakened area likely from the north winds over the previous weekend. More plants were affected in the sandier pockets of the...
- Author: Brad Hanson
A colleague at Ohio State University (sorry, I mean The Ohio State University) shared a recent series of extension publications they put together related to specialty crop injury from the auxininic herbicides dicamba and 2,4-D.
Dicamba and 2,4-D Fact Sheet Series
Admittedly (and thankfully!) we do not have the same challenges with these herbicides in California specialty crops as they do in the Midwest where small grains, corn, and more recently dicamba- or 2,4-D-tolerant soybeans are grown on millions of acres. However, I thought these fact sheets were well done and provide relevant information with regard to herbicide drift and investigating and documenting herbicide.../h1>
- Author: Drew A Wolter
- Author: Dani Lightle
- Posted by: Gale Perez
In order to prevent herbicide damage in young trees, especially from postemergence herbicide, standard pomological practice is to apply white latex paint to the bottom 2 to 3 feet of trunk of newly planted trees, before applying herbicides. While this may provide some level of protection, research to support this practice is lacking. In order to assess the efficacy of white latex paint in mitigating herbicide damage, a field experiment was conducted in Arbuckle, CA to evaluate the impacts of latex paint on herbicide injury in young almond trees.
- Author: Travis M Bean
- Re-posted by: Gale Perez
From the Topics in Subtropics blog (Oct. 15, 2018)
Although the main objective of herbicide use in avocado orchards (and all crops) is to manage weed populations, sometimes unintentional injury of the crop itself can occur when herbicides are incorrectly applied. Herbicide injury in avocado can reduce yield, decrease fruit, reduce plant vigor, increase susceptibility to diseases and pests, and sometimes result in plant death. Common situations resulting in injury include spray drift, tank contamination, application of the...