- Author: Carl E. Bell
- Re-posted by: Gale Perez
From the Invasive Plants in Southern California blog :: Jan. 24, 2014
Tips on applying herbicides
The table below is from training that my colleagues Dr. Cheryl Wilen, Area Advisor, UC IPM; Dr. Milt McGiffen, Extension Specialist, UC Riverside; and I did in southern California at four locations in 2009/2010 with a total of 80 people that all had previous experience applying herbicides on invasive plants. This training utilized the 128th acre sprayer calibration method (more on that below).
- Author: Carl E. Bell
- Posted by: Gale Perez
From the Invasive Plants in Southern California blog :: June 11, 2014
Preemergence herbicides for wildland weed control
Kill weeds before they ever see the light of day; sounds great, doesn't it? That is what preemergence herbicides are for. They are a mainstay in commercial agriculture and ornamental landscapes, so why not in wildlands? While there are situations where they would be very helpful I have some concerns that make me reluctant to recommend them in general.
First of all, what is a preemergent herbicide? (The shorthand version is PREE, so I'll use that term for the rest of this blog.) These are...
- Author: Richard Smith
Each of the past several years, we have received samples of tomato plants from small growers and homeowners that have severe leaf deformity. The leaves of affected plants have the following symptoms: the leaves are distorted with cupping and twisting (Photos 1 & 2), as well as strapping or shoe string symptoms (Photo 3); the leaves can also have distinctive flaring along the edges (Photo 4). In addition, the leaves can be tightly curled (Photo 5). We examined these samples for the presence of viruses, but have never found viruses associated with these symptoms. In addition, the symptoms do not fit classic virus symptoms such as mottling (blending of dark green and yellowing). The symptoms on these tomatoes most closely fit with...
- Author: Oleg Daugovish
Growers and pest control advisors look at strawberry plants daily and see problems often. Some problems like salt injury are frequent while others, like frost injury are only seen once in a few years. With over 60 pathological, physiological and nutritional problems it is important not to overlook injury from herbicides. In collaboration with UC strawberry workgroup members we recently launched a bi-lingual web site that displays injuries and disorders from chemical and other causes.
The site is a work in progress as we continue to add images of problems, translation into Spanish and update the content of existing pages with new information. We hope that with improved access to images and descriptions the site can be useful in...
- Author: Richard Smith
- Posted by: Gale Perez
From the UC Cooperative Extension Monterey County Crop Notes newsletter (March/April 2014)
Excellent weed control is essential for economically producing cilantro and parsley. Both crops have had various weed control challenges over the last few years. Cilantro and parsley are in the celery family and both are small acreage crops (cilantro 980 acres and parsley 533 acres in Monterey County in 2012) that are important to the local economy. In our modern production systems, both crops are planted in dense plantings (24-33 seedlines) on 80-inch wide beds. Parsley has been mechanically harvested for...