Continued Vigilance is the
Key to Keeping GWSS From
Spreading on Nursery Stock
Nursery stock is a high-risk commodity for spreading the glassy-winged sharpshooter (GWSS). The first GWSS of the season begin to emerge at the same time as the nursery industry is selling and shipping 75 to 85 percent of their stock for the entire year.
The Pierce’s Disease Control Program (PDCP) oversees activities throughout the state to reduce the risk of GWSS spreading on nursery stock.
During January and February of 2019:
- 5,567 nursery stock shipments have been made from GWSS generally-infested areas to non-infested areas of the state. Of these, 1,420 were Approved Treatment Program (ATP) shipments.
- One regulatory action has been taken this year due to a viable GWSS egg mass being found in a shipment.
Nursery Stock Approved
Treatment Program Update
From January 1 through December 31, 2018, there were 12,779 Nursery Stock Approved Treatment (ATP) shipments consisting of approximately 3.37 million plants. The total numbers for ATP shipments and plants in 2017 were 12,796 and 3.37 million, respectively. No regulatory actions were necessary in 2018 against any ATP nurseries.
Under the ATP program, county inspectors at destination may choose to monitor GWSS egg masses on treated shipments of nursery stock. In 2018, a total of two egg masses from two ATP yards were monitored in insect rearing sleeves by destination counties, with no viable GWSS emergences.