Adapting quantitative detection methods for determining silver scurf injury thresholds both in the soil and on seed potatoes to model potential economic losses

Richard Hogue, researcher

Richard Hogue

Researcher

418 643-2380
ext 420

Contact Richard Hogue

Description

The fungal pathogen Helminthosporium solani causes silver scurf, a disease that is hard to detect, both in the soil and on harvested potatoes. The disease reduces yields and affects the appearance of the tubers, especially after storage. Fresh potato marketing strategies are based on plastic packaging and the appearance of the potatoes plays an important role. Sensitive, accurate, and affordable silver scurf detection tests are needed to reduce losses. Quantitative PCR (qPCR) tests on soil samples or potato tubers can be used to determine infection thresholds above which the risk of economic loss at planting or after storage is too high. These innovative models for quantifying and estimating the economic risk of disease transmission are a key factor in maintaining and enhancing the competitiveness of Québec potato farms.

Objective(s)

  • Develop qPCR tests to determine the prevalence and detection rates of silver scurf (Helminthosporium solani) on potato tubers and in soil samples.
    Determine economic injury levels for silver scurf with respect to potato quality
  • Develop innovative models to predict economic loss based on economic injury thresholds that can be applied to different stages of seed and fresh potato production
  • Publish a guide on good practices for managing silver scurf in seed and fresh potato production and storage

From 2016 to 2017

Project duration

Market gardening

Activity areas

Pest, weed, and disease control, Food safety and quality

Services

This innovative model for quantifying and estimating economic risks will help enhance the competitiveness of Québec potato farms.

Partners

Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec | Growing Forward 2 | Groupe Pousse-Vert | Phytodata | ProgesT2001

This may interest you

Fingerweeder and pepper plants
2019-2020 • Market gardening

Developing a weed control knowledge transfer tool for organic market gardeners

This project seeks to develop a knowledge transfer tool to assist organic market gardeners with weed control.

Researcher: Maryse Leblanc

Read more about the project

Maryse Leblanc
Hay and corn
2019-2022 • Market gardeningField crops

Including perennial fodder crops as “cut and carry” nitrogen sources in long-term rotations of organically grown potatoes and field crops

We will compare the ability of mixed protocols using blended green manure, with or without the addition of farm manure, to satisfy the nitrogen requirements of a silage corn rotation crop.

Researcher: Christine Landry

Read more about the project

Christine Landry
Potatoes
2017-2019 • Market gardening

Cost-effectiveness of irrigation on Québec potato farms

The aim of this project is to evaluate this aspect of potato production economics to assist producers and their advisors.

Researcher: Luc Belzile

Read more about the project

Luc Belzile