Weed Research & Information Center
University of California
Weed Research & Information Center


Please visit the main

UC Weed Research and Information Center
website at: http://wric.ucdavis.edu

The UC Weed Research and Information Center is an interdisciplinary collaboration that fosters research in weed management and facilitates distribution of associated knowledge for the benefit of agriculture and for the preservation of natural resources.

UC Weed Science Blog

New EPA Paraquat Restrictions

'One sip can kill

As the 2020 growing season approaches, California growers, PCAs and handlers will have new regulations to take into consideration. The United States Environmental Protection Agency (EPA) recently...

Posted on Monday, January 27, 2020 at 10:52 AM
Tags: herbicide (60)
Focus Area Tags: Agriculture,Pest Management

Young orchard weed management

Figure. 1 Herbicide damage in 2nd leaf almonds. Glufosinate + Glyphosate (1.5 + 2.75lbs/ac). Fig. 1A shows trunk gummosis observed 5 weeks after treatment. Fig. 1B shows complete defoliation of the same tree 12 weeks after treatment.

Weeds in young orchards compete with trees for orchard resources such as sunlight, water and nutrients. This can lead to reductions in growth and future yields. If weed stands are allowed to mature,...

Posted on Wednesday, January 22, 2020 at 8:00 AM
Tags: herbicide (60), orchard (9), weed management (23)
Focus Area Tags: Agriculture,Pest Management

Weed Management in Citrus Orchards


From the TOPICS IN SUBTROPICS blog (Jan. 10, 2020)   Weed Management in Citrus Orchards Proper weed management is important for several reason, but in general younger orchards are much more...

Posted on Wednesday, January 15, 2020 at 7:00 AM
Tags: Citrus - General (2), herbicide (60), weed (21)
Focus Area Tags: Agriculture


Event Name

Job announcement

Area Low Desert Integrated Pest Management (IPM) Advisor #20-01 NEW
County Location: Imperial County
Posted on January 23, 2020
Closing on February 28, 2020

Climate & Agriculture Project Scientist AP 19-07
County Location: Merced County
Posted on January 15, 2020
Closing on February 24, 2020

Webmaster Email: gperez@ucdavis.edu