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Protect Napa County: Help Prevent the Glassy-Winged Sharpshooter Infestation

Join us in safeguarding the beauty of Napa County by preventing the spread of the Glassy-Winged Sharpshooter (GWSS). This invasive pest feeds on plants, drawing life-giving fluids and spreading diseases like Pierce’s Disease, which can devastate local agriculture. With 125,000 residents and millions of annual visitors, it’s crucial to keep our county thriving. Learn how to identify GWSS, what to do if you find one, and how you can support local businesses in the fight against this pest. Together, we can protect Napa County's unique landscapes!

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Protect Napa County: Help Prevent the Glassy-Winged Sharpshooter Infestation

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  1. Keep Napa County Beautiful Help us keep the Glassy-Winged Sharpshooter out of our County

  2. The Beauty of Napa County • 125,000 people live in Napa County • Approximately 6 million people visit Napa County every year

  3. Glassy-Winged Sharpshooter • Draws life-giving fluids out of living plants • Spreads a variety of diseases to crops and ornamental plants • Not native to California

  4. GWSS Feeding • Sucks in water from the host plant • Excretes a white liquid called “sharpshooter rain” • Drinks approximately 13 milliliters per day, or 200-300 times its body weight (equivalent to an adult human drinking 4,300 gallons of water per day!)

  5. “Sharpshooter Rain” • If you see white stains on your patio furniture, plants, a sidewalk or street, you may have glassy-winged sharpshooters in the area.

  6. Damage caused by GWSS • GWSS spreads disease-causing bacteria from plant to plant when it feeds • Diseases include: Leaf scorch of Almonds, Oleander and other plants, as well as Pierce’s Disease in grape vines, blackberry, and other plants

  7. Damage caused by Pierce’s Disease A Damaged Vineyard Pierce’s Disease inhibits the plant’s circulatory system, choking off its food and water supply.

  8. GWSS Egg Mass • Underside of leaves • Look for waxy coating and exit holes Unhatched Egg Mass Old Egg Mass

  9. Nymphs and Adults • Nymphs are wingless and paler in color. • Adults are brown to dark brown in color, ½ inch long, have wings, and appear to have a sloping forehead.

  10. GWSS Inspection Program • Nurseries and landscape businesses are inspected for adults, nymphs and egg masses

  11. Support local businesses • Look for the Certificate of Compliance at your local nursery or landscaper’s office

  12. How Employees Can Help • Employees of vineyards, wineries, nurseries, landscapers, etc. should be able to recognize the insect • Hospitality industry employees can encourage co-workers and visitors to keep their eyes open

  13. Become a Sharpshooter Spotter! • Check your outdoor plants regularly • Take walks in your local parks and recreation areas

  14. What to do if you find one • Collect specimen in suitable container • Compare specimen to pictures on www.bugspot.org or • Compare insect to picture in brochure • If similar, then call 1-866-BUG-SPOT

  15. If you have GWSS, we’ll… • Arrange with you to come and look at the infestation • Discuss options to eliminate GWSS from your property

  16. Economic Impact • Napa County’s economic contribution to the state of California is approximately $4 billion annually, including agriculture- and tourism-related jobs and products.

  17. Keep Napa County Beautiful!

  18. Contact Us: 1-866-BUG-SPOT www.bugspot.org

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