Winged Primrose Information

UC IPM Website (under Emerging Pests in California)

2013 Rice Grower Meeting presentation: Winged Willow Primrose

UC Rice Blog posts:
New weed identified in California rice
Behavior of winged primrose willow & herbicide options for control

June 2012 Rice Briefs newsletter: Behavior of winged primrose willow and herbicide options for control

Butte County Agricultural Commissioner winged primrose willow page (management, identification, characteristics, maps) 

Photo credits: Luis Espino, UCCE; Jim Eckert, UC Davis; Evan Padgett, Butte County Agricultural Commissioner Department