ADDITIONAL RESOURCES

More PVY Information Whatcom County http://whatcom.wsu.edu/ag/edu/whpb Horticulture Pest Board Y: https://blogs.cornell.edu/potatovirus/ WSU Whatcom County Washington Seed Potato Extension What You 1000 North Forest Street Isolation District Suite 201 Need to Know Bellingham, WA 98225 http://apps.leg.wa.gov/wac/default.aspx? cite=16-325 Phone: 360-778-5800 Website: Management Guidelines http://whatcom.wsu.edu/ag/ edu/whpb/ https://pnwhandbooks.org/insect/vegetable/ E-mail: [email protected] irish-potato/potato-irish-aphid

PVY Resistant Potato Cultivars https://blogs.cornell.edu/potatovirus/pvy/ potato-virus-y-pvy-management/#resist

Whatcom County Horticulture Pest Board WHY IS PVY IMPORTANT IN HOW CAN I HELP MANAGE WHAT IS POTATO WHATCOM COUNTY? VIRUS Y (PVY)? PVY? Whatcom County is the largest producer The potatoes you grow at home can PVY is a that infects of certified seed potatoes in Washington solanaceous plants like potato, introduce PVY or act as a host of state. With over 3300 acres grown in the , and pepper. It is an PVY. County in 2017, it is an economically economically important virus To avoid this potato disease : affecting seed and commercial important crop. Additionally, seed potato farms. The virus impacts potatoes are an important rotational • Buy seed potatoes that have a potatoes by reducing yields and crop for other parts of the agriculture blue tag certification tuber quality. sector such as red raspberries. PVY is spread by . As aphids • Manage aphids (see back panel) To protect this industry , the 55th feed on the plant they uptake the virus. When aphids move onto legislature of the state of Washington • Remove volunteer potatoes and another plant they will deposit the recognized that to produce high quality dispose them into trash virus into that plant. The virus is also certified seed potatoes, seed growing transmitted through infected seed areas need to be as free as possible from • Use resistant cultivars (see back tubers and as a result avoiding insect pests and plant diseases. After the panel) buying infected seed is critical. Washington State Seed Potato Symptoms of PVY include: Commission petitioned the Washington • When selecting seed potatoes, avoid cracked tubers • Brown/black line patterns on Director of the Department of veins or shoots Agriculture, a restricted seed potato • Canoe-shaped cracks in tubers production area was created. Rules were • Death of growing points adopted in 1998 that created an isolated • Leaf distortion and leaf seed potato production district in dropping Northwest Washington (To See a Map: • Stunted growth https://goo.gl/JhHspm). As a result, all • Tuber necrosis or potato tuber potato plantings in excess of one acre necrotic ringspot disease need to be enrolled in the seed potato (PTNRD) certification program, in part, to protect • Yellow/light green/dark green against spread of PVY. mosaic patterns on leaves Seed potatoes certified with a blue tag by WSDA to meet state standards for limited seed tuber borne PVY and other diseases are grown in the isolation district. Cracked ‘Chieftain” tuber that tested positive PVY