Alkaliweed Alert! Your Help is Needed!

Information Needed on A New Plant Called Alkaliweed 

By James Schaeffer, Kurt Hembree, and Anil Shrestha, Graduate Student CSU, Fresno, UCCE, Fresno County, and Professor, CSU, Fresno

Pistachio growers and consultants in the southern San Joaquin Valley have recently reported an invasion of a new plant (alkaliweed) along irrigation ditches, roadsides, and into their orchards. Alkaliweed is a California native perennial plant that seems to be rapidly spreading throughout the region.

In some cases, this weed has completely taken over pistachio orchards in a matter of a couple of years after first being spotted. Thus far, repeated applications of postemergence herbicides have only yielded minimal control effects.

Alkaliweed in the field.

Unfortunately, little information is known to date about specific biological and ecological characteristics of this weedy plant, so we are asking for your assistance to help us identify where specifically it has become a problem for you. With this information, we will better be able to understand its growth characteristics and hopefully develop control measures to mitigate the problem.

Studies are currently under way to look at some of these growth characteristics (such as response to salinity, light, and moisture). Your input of where it has become a problem for you and your growers is critical for us to be successful.

Please follow the link https://survey123.arcgis.com/share/1f4753edfd7347ce84cc81f35e65dc02     to take a quick survey on alkaliweed in your area. Your help on this important weed issue is greatly appreciated!

Fresno State Plant Science Students Earn top Honors at UC Davis Weed Day

A team of four Fresno State plant science students took first place in the weed identification category at the 58th annual Weed Day seminar hosted by University of California, Davis.

Seniors Sarah Parry of Sonora, Isaac Giron of Terra Bella and Mala Tu of Cambodia and graduate student Rama Paudel of Nepal correctly identified 17 of 20 weeds to win the contest among almost 200 students on July 10.

Students were asked to identify different types of weeds during a tour of current weed research plots at UC Davis. The plots involved herbicide research in annual fruit and vegetables crops, crop safety and herbicide symptomology demonstrations, aquatic weeds and grassland weed invasion and restoration research.

The students were invited to a dinner after the seminar for one-on-one interaction with UC Davis weed science graduate and post-doctoral students, extension specialists and professors.

“It was a great experience that opened my eyes to new opportunities in weed science and it has encouraged me to pursue my master’s degree,” Perry said. “I’m excited to see what the future has in store.”

Each year, Weed Day brings together pest control advisors, farm advisors, chemical company cooperators, college faculty and students and regulatory officials to learn about current weed science research at UC Davis.

For more information, contact Steve Wright, farm advisor at sdwright@ucdavis.edu or 559.684.3315.