- Author: Sarah Light
In March of this year I traveled to Chimoio, Mozambique to provide an Integrated Pest Management training to a group of farmers through the USAID Farmer-to-Farmer program. On my first day at the farm, we toured the farm and discussed their worst pest issues. One of the farmers brought a red flowering weed to show me, which he said it caused major issues in corn and was very difficult to control.
We continued on our way and it became clear that the biggest pest issue they were facing was the fall armyworm, an invasive species that spread to Mozambique in 2017 and can decimate a corn field. Since chemical inputs aren't always economically feasible for low-input systems like the one I was working in, I was interested learning about...
- Author: Brad Hanson
I was debating about what to post on the weed blog this week and, like manna from heaven, a topic dropped in my lap!
Well ok, it was actually the summer newsletter from the Western Society of Weed Science but it had an article about biological control agents on houndstongue (Cynoglossum officiniale).
The article, entitled "Houndstongue Biological Control: Status Report" was written by Carol Randall from the USDA Forest Service. You can find the article at this LINK and scroll down to page 11 for Carol's summary...
From the Topics in Subtropics blog
The following article is from the UC ANR Integrated Pest Management website, authored by Cheryl Wilen.
Puncturevine (Tribulus terrestris) is an aptly named summer annual found widely in California. Native...
Dr. Mohsen Mesgaran, who joined the Weed Science Group this year as our weed ecophysiologist, found this plant growing on the research farm at UC Davis.
African spiderflower is a summer annual broadleaf plant in the caper family (Cleomaceae), growing up to 3 ft tall and wide. The flowers are white, somewhat tubular, with long red-to-orange stamens (see photos below). Interestingly, African spiderflower plants have three types of flowers - male, female, and hermaphroditic.
We have no idea how this plant got here. It is native to Africa, where the leaves are used as a vegetable; it is now widespread and invasive in many tropical to subtropical parts of the world. The USDA
- Author: Brad Hanson
Last Thursday (March 15, 2018), the Western Governors' Association released its first ever list of the top 50 invasive species (25 terrestrial, 25 aquatic) important in the western US. This list includes a number of plant, animal, insects, and pathogens.
Weeds were 18 of 25 in the terrestrial list and 10 of 25 and in the aquatic list. Both lists had weeds in the #1 slot (tamarisk and Eurasian watermilfoil, respectively.
Here's a link the the press release: http://westgov.org/news/wgas-top-50-invasive-species-in-the-west-offers-first-regional-report
Here's a link to...