Dr. Arturo Calderon, Postdoctoral scholar, USDA and UC Davis has released an instructional video (in Spanish) on the use of the pressure bomb to measure grapevine leaf water potential. We hope you will find this video to be a useful training tool. http://www.youtube.com/watch?v=83FXDi8Vkxg
In January, Dr. Gubler and I visited a vineyard that seemed to have very clear symptoms of a trunk disease (Eutypa or Botryosphaeria). Yet when we looked closer, we determined the symptoms were not caused by a pathogen...link to the newsletter below to see photographs and read our full report.
