- Author: Gale Perez
**EVENT DATE CHANGE**
Event: Weed Science School 2011
Date: Sept. 6-8, 2011 (not Sept. 19-21, 2011)
Location: UC Davis
- Author: Brad Hanson
Today I wanted to follow up on my post from a few weeks ago about volatile organic compounds (VOC) from herbicides and other non-fumigant pesticides. In case you missed it, the discussion on February 27 was about an online VOC calculator developed by California Department of Pesticide Regulation (CDPR). This tool allows users to compare calculated VOC emissions of individual pesticides or season-long pesticide programs.
In the same area of the CDPR website, there is a document called "
- Author: Brad Hanson
I only have a moment to post today but wanted to put up two links concerning the research and publications of a retired Purdue University researcher. Dr. Don Huber has made a number of claims about the effects of glyphosate-resistant cropping systems on soil pathogen populations and micronutrient uptake. I have received several calls about this (particularly the micronutrient aspect) in recent months.
The first link is to a Washington Post article entitled "Researcher's warning about genetically modified crops spreads, but scientists question...
- Author: Joseph DiTomaso
In a Great Basin sagebrush community, low rates of glyphosate applied at the medusahead tillering stage in late April to early May provided excellent control of medusahead. At this timing, we achieved at least 95% control of medusahead cover and a corresponding reduction in seed production with 4 oz Roundup per acre in 2009 and 9 oz Roundup per acre in 2010. These rates are far lower than those required to control perennial species and provide a more cost effective option to ranchers and land managers compared to other herbicide treatments. Earlier applications required significantly higher rates, probably due to reduced glyphosate activity in cooler...
- Posted By: Brad Hanson
- Written by: Brad Hanson
I visited a couple herbicide trial sites in orchards and vineyards yesterday and saw some interesting results that follow up on my post from February 21, 2011. In that post, I discussed some 2010 work where we evaluated a number of residual herbicides applied in combination with a fairly high rate of glyphosate. You can see that poster presentation from the WSSA meeting here. As I drove past the walnut orchard trial from 2010, I had to slam on the brakes and go investigate the plot in the photo below.
After a little investigation, I determined that our application of...