- Author: Brad Hanson
- Article author: Kurt Hembree
- Article author: Tom Turini
This is the third in my series of posts outlining current University of California weed science research published in the California Weed Science Society (CWSS) Research Update and News (June 2013, Volume 9, #2).
Kurt Hembree and Tom Turini (both UCCE Farm Advisors in Fresno Co) discuss some issues related to herbicide persistence and crop safety in processing tomato that appears to be related to changing irrigation practices. Historically, tomato crops were sprinkler irrigated after...
- Author: Brad Hanson
- Author: WSSA
I received a press release this week from the Weed Science Society of America (WSSA) that I thought would be of interest to followers of the UC Weed Science blog (link above, or attached below).
The press release lays out a dozen examples of "unfortunate (and illegal) consequences that can happen when you don't" follow the information on a pesticide label. I thought the first reason (wrong product,...
In June we visited a first-leaf almond orchard that had started the season growing normally, but as the root system expanded, the trees’ growth became rapidly stunted (Fig. 1). The newly expanding shoot tips showed ‘little leaf’ symptoms (Fig. 2) characteristic of glyphosate injury, with an incredible proliferation of shoots (Fig. 3) growing from the same point on the scaffolds.
After investigating crop rotations, we learned that the trees showing symptoms had followed alfalfa newly planted the previous year that had been removed after only one year. Trees from the same nursery and farmed by the same grower were planted on the other half of the ranch in ground following three years of alfalfa...
- Author: Douglas J Munier
Some data from over 15 years ago may help people better asses the damage from phenoxy herbicide drift in the San Joaquin Valley this year. This data is only for one trial in one year, but shows the range of damage which can occur in cotton. The yield losses were the greatest when the cotton plants show continued phenoxy symptoms on new growth all season long.
Thousands of acres of cotton in the Sacramento Valley were damaged by phenoxy herbicide drift in 1995. Cotton had not been planted on a large acreage in the Sacramento Valley since being planted in the 1920’s. This widespread damage continued in 1996 and 1997 and only stopped when the phenoxy herbicde manufactures severely restricted...
This is a repost (with permission) of an article by Mark Bolda (UCCE Santa Cruz Co) from April 27, 2012. The original post and the Strawberry and Caneberry blog can be found at: http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7362
by Mark Bolda:
This comes up a couple of times every year so it is worth reviewing and certainly adds value to our catalogue of plant disorders on these berry blogs.
The following plant sample of a proprietary...