- Author: Brad Hanson
Happy Halloween!
Today I wanted to follow up on a previous post on the phenonena of enhanced microbial degradation of the residual herbicide simazine in orchards and vineyards. In that post, I described research that we did a few years ago to address faster-than-normal degradation of simazine in citrus orchards.
The results of concurrent study done in raisin vineyards near Parlier was published in the most recent issue of the journal Weed Science. Unfortunately, that journal is not open-access but academic folks can find the article under the citation Abit, Rainbolt, Krutz,...
- Author: Brad Hanson
Today I thought I'd share a recent research report on the the phenomenon of "enhanced" degradation of the herbicide simazine in citrus orchard soils. Click here for a link to the publication in the open-source journal, Air, Soil, and Water Research (Abit et al. 2012. Air Soil and Water Research 5:69-78). The lead author was a UC Davis post doctoral researcher and her coauthors include UC Davis, USDA-ARS, Fresno State, and UC Cooperative Extension folks.
This work was started several years ago in response to some questions from San Joaquin Valley orchard and vineyardists poor weed control with simazine. They suspected herbicide...
- Author: Brad Hanson
I recently received a copy of a paper published by CropLife Foundation entitled "The Importance of Herbicides for Natural Resource Conservation in the U.S.". Publication date: January 2012.
I thought the paper had some interesting data on how herbicidal weed control has reduced the amount of tillage-based weed control and contributes to reductions in soil erosion, water concervation, and energy use in agriculture.
The article is available along with a number of other publications at the CropLife Foundation home page (here), direct link to the pdf (
- Author: Brad Hanson
I was forwarded a question recently about rotating herbicide mode of actions for resistance management in vineyards and realized that the information is not always particularly easy to find. We are planning to include site of action information in the next update of the Herbicide Susceptibility Chart; however, it is not available on the current version (http://info.ucanr.org/weed_sept/).
In the meantime, I updated the T&V herbicide registration chart from a few weeks ago with herbicide site of action groups according to the Herbicide Resistance Action Committee (letter/number) and Weed Science Society of America-WSSA (number) systems. There is still some debate about the...
- Author: Brad Hanson
We recently updated the Herbicide Registration chart for California tree and vine crops. Since I've done this two years in a row, I think this is officially a trend and can be called an "annual update"!
The updated version of the T&V herbicide chart is attached at the bottom of this post and is also available at this link: http://wric.ucdavis.edu/PDFs/herbicide_registration_on_horticultural_tree_and_vine_%20crops_2011_10.pdf to the
