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

Corn
2017-2019 • Market gardening

Large-scale use of trichogramma wasps against the European corn borer (Ostrinia nubilalis) in fresh and processing sweet corn

The goal of this project is to boost the number of fresh and processing sweet corn producers in Québec using trichogramma to control European corn borer.

Researcher: Annabelle Firlej

Read more about the project

Annabelle Firlej
Irrigation pond

Control measures to reduce clogging in a St. Lawrence River water treatment process using slow sand filtration

To manage clogging risks, the project automated pumping based on water turbidity and cover the filter to prevent light from entering the water and thus reduce algal bloom. 

Researcher: Caroline Côté

Read more about the project

Caroline Côté
Green manure
2014-2017 • Market gardeningField crops

Effect of legumes, manure, and compost on soil nitrogen dynamics and microbial diversity under organic production

Using a split-split-plot design, this study tested three variables: soil tillage, crop rotation in organic production, and fertilization with manure or compost.

Researcher: Caroline Côté

Read more about the project

Caroline Côté