Understanding and integrating a novel technique to promote depletion of weed seed banks: How biofumigation affects different types of seed dormancy and weed ecology
Maryse Leblanc
Researcher, agr., Ph.D.
Description
Weed control methods to reduce the number of viable seeds in the soil are limited in organic production. Biofumigation could be an attractive option for increasing the mortality of dormant seeds. Biofumigation uses plants naturally rich in glucosinolates (especially the cabbage family), which release toxic volatile compounds (thiocyanates and isothiocyanates) as they decompose. The aim of this project was to explore the potential of biofumigation for reducing weed seed banks and its long-term impact on weed communities. Two experiments were set up at the Organic Agriculture Innovation Platform in Saint-Bruno-de-Montarville, Québec. The first was a greenhouse study on four generations of weeds and the second was a three-year field trial.
Objective(s)
- Determine the impact of biofumigation on seed dormancy and the reproductive capacity of successive generations of weeds
- Determine the long-term impact of biofumigation on weed communities
From 2014 to 2018
Project duration
Market gardening
Activity areas
Pest, weed, and disease control, Organic farming
Services
This technique being tested at IRDA could compensate for the lack of weed control options available to organic growers.
Partners
Agriculture and Agri-Food Canada | Organic Science Cluster II
Publications
This may interest you
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
Developing an organic farming protocol for young vegetable shoots: a multidisciplinary approach
This project will help lead to the development of an organic farming system to grow baby greens.
Researchers: Caroline Côté Annabelle Firlej Carl Boivin Maryse Leblanc
Developing fertilization strategies for organic garlic farming that combine green and farmyard manure, while taking their N and P supply dynamics and soil quality impacts into account
By enhancing our understanding: 1) of the nitrogen supply dynamics associated with the use of mixed green and farmyard manure applications, and 2) of the timeline of nitrogen uptake by garlic; we hope to fine-tune fertilization strategies so they meet the needs of garlic crops, while minimizing phosphorus accumulation and nitrogen leaching.
Researcher: Christine Landry