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North American Certified Seed Potato Health Certificate (NACSPHC)

Carol MacNeil, Extension Vegetable Specialist
Cornell Vegetable Program

Last Modified: August 31, 2016

North American Certified Seed Potato Health Certificate (NACSPHC)
The emergence of Potato Virus Yntn, which causes tuber necrotic ringspot disease (TNRD) in susceptible varieties, and the emergence of blackleg Dickeya, both serious seed-borne diseases, are very important reasons why you need to get a copy of the North American Certified Seed Potato Health Certificate (NACSPHC) for each lot of potato seed you buy.  

About 20% of the PVY in the North American seed crop is currently PVYntn. 25% incidence of TNRD occurred in a local grower's crop from one field, resulting in very high losses. It is reported as "Mosaic" on the certificate, which includes all the PVY strains. Only buy seed lots with a very low percent of mosaic. Aphids can spread the disease from a non-necrotic ringspot susceptible "carrier" to a susceptible variety on your farm.
From Meg McGrath, 8/25, Long Island Fruit & Vegetable Update - Brown leaf spots and necrotic leaf veins in the early, European variety Nadine this season were confirmed to be caused by PVYNTN. See photos of these leaves and of a plant with more typical mild symptoms, plus information about PVY. Also see images of the brown necrotic ringspots on tubers of a susceptible variety. In other varieties PVYntn only reduces yield, causing plants to produce fewer and smaller tubers. Read about varietal susceptibility to TNRD.

Common bacterial blackleg and the new, much more virulent bacterial blackleg Dickeya (BBD) aren't distinguished on the NACSPH Certificate, but are reported as "Blackleg" at this time. About 30% of potato stems in one local field wilted and died from BBD in 2015. Four fields were confirmed positive in the CVP region in 2016, and more fields were suspected. Plant pathologists are recommending that growers adopt 0% tolerance for blackleg in their seed. If any BBD was seen in a field this year check carefully for rotting tubers and the "shells" of tubers that already rotted, before harvest. Also note if yield was less than expected. 2016 incidence of BBD in Eastern and some Midwestern fields were traced to 11 ME seed producers and 2 New Brunswick, Canada, producers, of Reba, Superior, Vivaldi, Norwis, Snowden, Yukon Gold, Beacon Chipper, Kennebec and Atlantic.  


North American Certified Seed Potato Health Certificate (SAMPLE) (pdf; 469KB)

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Upcoming Events

Women in Agriculture Discussion Group: Urban Farming

May 6, 2019
Monday, 6:30 - 8:00 PM
Buffalo, NY

Each monthly Women in Ag discussion group meeting will feature an established, innovative Farm-her leading the group on a tour of her operation and sharing her expertise on business management and production. Several guest speakers, as well as Cornell Vegetable Program staff, will be brought in to act as resource people for developing solutions to common production challenges.

The May 6 meeting will cover positive public relations and navigating municipal ordinances in urban farming. The meeting will be hosted by Mayda Pozantides (Groundwork Market Garden) and Allison DeHonney (Urban Fruits & Veggies). Participants will learn about production in urban soils and how to adapt farming techniques for urban environments.
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Women in Agriculture Discussion Group: Small Fruit & Vegetable Production plus Insect Control

July 15, 2019
Monday, time TBA
East Aurora, NY

Each monthly Women in Ag discussion group meeting will feature an established, innovative Farm-her leading the group on a tour of her operation and sharing her expertise on business management and production. Several guest speakers, as well as Cornell Vegetable Program staff, will be brought in to act as resource people for developing solutions to common production challenges.

The July 15 meeting will cover small fruit production and insect control led by Elizabeth Buck, CCE Cornell Vegetable Program, and Abby Seaman, NYS IPM Program. The meeting will be hosted by Gayle and Naomi Thorpe (Thorpe's Organic Family Farm). Gayle and Naomi will share their experiences managing a diversified organic farming operation and family farm transitions.
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Announcements

How to Take a Soil Sample

Soil sampling is an important part of managing your crops, but it's important to do it correctly. In this video created by the Eastern NY Commercial Horticulture Program, Vegetable Specialist Amy Ivy demonstrates how to take a soil sample.

For more information or to get soil sampling forms and supplies, visit Agro-One online.

Cornell Commercial Vegetable Guidelines Available

The 2019 Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production are now available!

Written by Cornell University specialists, this publication is designed to offer producers, seed and chemical dealers, and crop consultants practical information on growing and managing vegetable crops in New York State. Topics include general culture, nutrient management, transplant production, postharvest handling, organic production, and managing common vegetable crop pest concerns. A preview of the Vegetable Guidelines can be seen online.

Highlighted changes in the 2019 Vegetable Guidelines include:
  • Updated pesticide options for economically important vegetable crop pests.
  • New pests: beet armyworm in beets; cabbage looper and tarnished plant bug in lettuce and endive; allium leafminer in onions; and Cladosporium, Cercospora, and Stemphylium leaf spots in spinach.
Cornell Crop and Pest Management Guidelines are available as a print copy ($41), online-only access ($41), or a package combining print and online access ($57.50). Shipping charges will be added to your order. Cornell Guidelines can be obtained through many local Cornell Cooperative Extension offices, or from The Cornell Store at Cornell University or call (844) 688-7620.

Empire State Producers EXPO Proceedings

Proceedings from the Empire State Producers EXPO conference from 2011-2019 are available online.

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