February 2021

  • Detection and Rapid Response Update
  • Updates on Nursery Programs
  • PD/GWSS Board Welcomes New Members
  • In the News:
  • "PD-Resistant Vinifera Varietals Ready for the Market"
  • "Update on the Epidemiology of the Grapevine Red Blotch Virus"
Urban sticker trap
Detection and Rapid Response Update

In 2020, a new glassy-winged sharpshooter infestation was found in the Trimmer Springs area of Fresno County. Also in 2020, the existing infested area in Madera County, near the Fresno County line and along Hwy 41, expanded and now includes the Rolling Hills area. These changes were in addition to ongoing eradication or suppression efforts in the existing infested portions of Fresno, Madera, and Tulare counties. GWSS were found on approximately 1,067 properties, and 5,951 properties were treated in these partially infested counties.
Nursery employees inspecting a small tree for GWSS
Updates on Nursery Programs

Nursery Regulatory Program:
In 2020, there were 40,800 nursery stock shipments to non-infested areas of the state. Origin county inspectors stopped seven glassy-winged sharpshooter adults, six nymphs, and 55 egg masses from moving in nursery stock shipments. Almost all nursery shipments (99.99%) were free of GWSS during destination inspections. However, five enforcement actions (Notices of Rejection) were issued by receiving counties due to viable life stages of GWSS found in incoming nursery stock shipments.

Nursery Stock Approved Treatment Program (ATP):
In 2020, there were 10,945 ATP shipments, consisting of approximately 2.62 million plants. No regulatory actions were taken against any ATP nurseries for viable life stages last year.

PD/GWSS Board Welcomes New Members

Two new members joined the PD/GWSS Board in January:
  • Kendall Hoxsey-Onysko, with Yount Mill Vineyards in Oakville, is a producer & processor representing the North Coast region.
  • Seth Schwebs, director of viticulture at Constellation Brands, is a producer & processor representing the Central Valley.

Click to view the list of Board members.
In the News