Weed control without chemicals means fewer options. In fact, weed control is often cited as a reason farmers decide not to pursue organic certification. Although ecological weed management tactics are available, research reveals that many organic farmers do not take advantage of them.
This may happen for a variety of reasons. All weed control methods come with pros and cons, which vary depending on specific growing conditions, cropping systems, and farmer priorities. For example, in a low-value crop, investing time into mechanical or hand-weeding may not be economically feasible. In poorly draining soils, frequent cultivation may lead to soil compaction and drainage problems, or field conditions may make it difficult to add a cover crop into the rotation.
To help farmers consider these trade-offs, a team at The Ohio State University and Michigan State University has developed an online tool to present different weed control strategies, along with their historic long and short-term performance.
How it works.
The Organic Weed Manager tool collects specific information on growing conditions and farmer priorities. The program then compares the users’ current strategy with alternative approaches, showing the predicted impacts over time across diverse objectives (weed seedbank, costs, soil health, etc.). For those who want to consider a new approach to weed control, the tool also suggests specific steps to take.
The online tool is easy to use and gives individualized results. The tool is not meant to make management decisions for you, but rather to provide an opportunity to consider and compare alternative strategies, while reflecting on individual priorities and values. In this way, the research team hopes to lower barriers to on-farm experimentation and improve adoption of organic weed management techniques.
The Organic Weed Manager software is free and available at organicweedmanager.com. Completing the tool takes approximately 20 minutes. Users may save their progress and return later to complete it. Users can access the tool from a desktop or laptop computer, tablet, but not from a phone. Farmers and farm advisors are encouraged to use the tool and provide feedback for further development. The tools itself contains an area for evaluation and comments.
For more information about organic weed control options, including case studies, resources, and ongoing research projects, visit go.osu.edu/eco-weed-mngt.