- Author: Gale Perez
UC Davis weed experts contribute to pioneering Encyclopedia of Biological Invasions
Cooperative Extension Weed Specialist Joe DiTomaso, Emeritus Professor Robert Norris, and Plant Physiologist Lars Anderson with USDA-ARS Exotic and Invasive Weeds Research are among the international experts who contributed to a soon-to-be released encyclopedia on topic at the forefront of global ecology—biological invasions, or organisms that come to live in the wrong place. This pioneering book, Encyclopedia of...
During the last few years, one of my core research areas has included several projects related to preplant soil fumigation in collaboration with a number of UC, USDA-ARS, and industry researchers. I touched on soil fumigants a bit a few weeks ago shortly after methyl iodide was registered by DPR (link to previos post). Today I thought I’d touch upon research results related to minimizing emissions of two of the most widely used methyl bromide alternatives, 1,3-dichloropropene and chloropicrin.
Soil fumigation is used prior to planting a number of high value crops in California. One of the most widely used soil fumigants, methyl bromide,...
This is one part follow up to my previous post on glyphosate resistance and one part test of a tool to imbed articles in the blog.
The above frame has a 2008 report that Anil Shrestha, Kurt Hembree, and I wrote for California Agriculture on our glyphosate-resistant hairy fleabane work. You can click on it to open it in a full-screen reading pane.
I like this document hosting interface and may use it again. If you have problems viewing it in a particular browser, please let me know.
The article can also be downloaded here
Early winter is is a good time of year to talk about another landscape weed problem - catchweed bedstraw (Galium aperine) also known as cleavers in much of the rest of the world (among many other names).
In California, bedstraw is summer or winter annual and we are starting to see the beginning of the winter germination flush in the Davis area. We usually see a lot of bedstraw germiantion in the early winter after the rain starts and the soils start to cool; however, there is often a secondary flush of germination in the late winter and earlys spring (Feb-March). Bedstraw will grow into the summer but really doesn't do very well in the hottest times of the year. It tends to complete its lifecycle by...
Recently I was reminded that there is no more important fundamental to weed control than being able to identify your weed problem.
This summer, I moved to a different house and have slowly been working on little projects that arise. One of these has been figuring out what weed problems I bought along with the house – in my case, this has (so far) turned out to be creeping woodsorell (Oxalis corniculata) in my lawn areas and Bermuda buttercup (Oxalis pes-caprae) almost everywhere else (beds, garden, potted plants)! I’ll save my trials and tribulations with Oxalis management for another day; however, UC-IPM has a nice pest management guideline on Oxalis authored by LeStrange, Elmore, and Cudney here: