- Author: Clyde Elmore, Extension Weed Specialist (Emeritus)
- Posted By: Gale Perez
We have all heard that turf grass is competitive to weeds and other plants in the landscape. There are several turf grass types grown in California. In southern California, Bermuda grass is the more common planting though Turf-type tall fesc ue is also used as well as other species to a lesser extent. Smooth and large crabgrass are the most prevalent summer annual grass weeds found in turfgrass in California. Can we devise systems using turf type, renovation (planting) time to establish a competitive, cool season, tall fescue turf and control crabgrass?
Several years ago with graduate student J. Graham Davis, and current farm advisor in Napa County, John Roncoroni, we developed experiments to study this concept. We chose...
- 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...
- Posted By: Brad Hanson
- Written by: Brad Hanson and Joi Abit, UC Davis Weed Science
Although many orchard weed managers are waiting for rain (or at least a chance of rain) before putting out their dormant-season herbicide applications, I thought I'd post a few results from three 2011 residual herbicide trials focused on hairy fleabane.
Brad
Field experiments were conducted in an almond and walnut orchard near Davis, CA and an almond orchard near Arbuckle, CA to evaluate premium residual herbicides plus burndown materials for dormant season application in tree nut crops. Several newer materials were compared to grower standards for their relative efficacy against hairy fleabane and a wide assortment of winter and summer...
- Author: Cheryl Wilen, UC IPM South Coast Area Advisor, cawilen@ucdavis.edu
- Posted By: Gale Perez
The public's increasing demand for safe “green” products has resulted in many new environmentally-friendly products becoming available for controlling weeds in the garden and landscape. Even though information for home gardeners on the efficacy of these new products is limited, their use is still heavily promoted by environmental awareness groups and public agencies in an effort to reduce the use of other herbicides that have a greater potential to contaminate surface waters. Retailers are beginning to dedicate shelf space to pesticides that are considered least-toxic alternatives; most of them containing essential oils or other natural plant extracts targeting weeds.
The majority of these “green”...
- Author: Brad Hanson
One of my major areas of research the past few years has been related to alternatives to methyl bromide fumigation in perennial crop nurseries. A list of recent posts on soil fumigation research and issues is available. Some specific research areas have included reducing atmospheric emissions of methyl bromide alternatives and on alternative fumigants such as methyl iodide.
Today, I thought I'd share some basic information on the nursery cropping system as well as two recent...
