Growing healthy crops starts long before the first strawberry appears on the plant. What happens beneath the soil can have a major impact on crop quality, farm productivity, and the health of the people working in and around agricultural fields.
For California strawberry growers, one of the ongoing challenges is controlling soil-borne diseases and weeds before planting. Chemical soil fumigants have traditionally played an important role in this process, but concerns about worker exposure and the potential movement of chemicals beyond treated fields have encouraged researchers to explore other options.
One approach gaining attention is surprisingly straightforward: using steam to treat the soil.
Recent research in California is examining whether specialized steam equipment can help farmers manage certain soil-borne pests and diseases while reducing their reliance on conventional chemical fumigants. The technology is being tested in strawberry fields, including areas where agricultural land sits close to homes and schools.
Why Soil Health Matters in Agriculture
Healthy soil does more than support plant growth. It is a living environment containing microorganisms, nutrients, water, and other components that influence how crops develop.
Unfortunately, soil can also harbor plant pathogens, nematodes, and weeds that interfere with crop production. Strawberry plants are particularly vulnerable to certain soil-borne diseases, which can damage roots, reduce yields, and create significant financial challenges for growers.
For decades, farmers have used chemical fumigants to control these problems before planting. While these products can help protect crops, some fumigants can also pose exposure risks for agricultural workers and create concerns about chemical movement through the air.
These challenges are especially important when fields are located near residential neighborhoods, schools, or other sensitive locations. California has been exploring ways to support sustainable pest management while balancing agricultural needs with the protection of workers and surrounding communities.
How Steam Treatment Works
Soil steam treatment uses specialized equipment to inject high-temperature steam into the soil before crops are planted.
The heat helps suppress certain soil-borne pathogens, weed seeds, and other pests. Unlike conventional chemical fumigants, the method does not rely on applying a synthetic fumigant to the field. Instead, it uses heat to treat the soil where the targeted organisms are present.
Researchers at the University of California, Santa Cruz, have been working to adapt this approach for commercial strawberry production. In a recent California field trial, a grower reported substantially higher strawberry production in steam-treated plots than in comparison plots. Researchers also observed less damage from Fusarium wilt, a fungal disease that affects plants. These early findings are encouraging, although additional work is needed to understand how well the approach performs across different fields and growing conditions.
The goal is not simply to replace one piece of equipment with another. Researchers are looking for a practical method that can help growers manage soil diseases, maintain productive fields, and reduce dependence on certain chemical treatments.
What This Could Mean for Farmworker and Community Safety
Agricultural safety extends beyond the boundaries of a farm.
When chemical fumigants are used, workers and nearby communities may need protection from potential exposure. Depending on the product and application conditions, that can involve restricted access, application controls, protective equipment, buffer zones, and other safeguards.
Reducing reliance on certain fumigants could offer another way to address these concerns. Steam treatment works within the soil rather than relying on chemicals that can vaporize and potentially drift through the air. That difference makes the technology worth studying, particularly in agricultural areas near schools and homes.
However, a non-chemical method is not automatically risk-free. Steam equipment involves high temperatures, pressurized systems, moving machinery, and other operational hazards. Employers would still need appropriate operating procedures, equipment maintenance, worker training, and measures to prevent burns and other injuries.
The broader lesson is that safer agricultural practices should consider both environmental exposures and the hazards associated with the methods used to control them.
Why the Technology Is Not Ready to Replace Every Fumigant
Despite its potential, soil steam treatment still faces practical challenges.
Treating large agricultural fields requires equipment that can work efficiently across substantial areas. The cost of generating and applying steam, the time needed to treat the soil, and the consistency of pest control all influence whether farmers can use the technology on a commercial scale.
California's Department of Pesticide Regulation has acknowledged that no currently available alternative can serve as a direct, widespread replacement for chemical pre-plant fumigants across all uses. Research and pilot projects are therefore important for determining where different alternatives can work effectively.
Researchers are continuing to explore ways to improve steam equipment and evaluate its performance under real farming conditions. Other approaches, including biological soil treatments and developing crop varieties with greater disease resistance, are also part of the search for more sustainable pest-management options.
For growers, the decision to adopt a new method needs to consider its effectiveness, cost, operational requirements, and suitability for the specific crop and soil conditions.
What Agricultural Businesses Can Do Now
Businesses do not have to wait for a new technology to become widely available before strengthening their environmental health and safety practices.
A useful starting point is reviewing how pesticides and other agricultural chemicals are selected, stored, handled, and applied. Accurate application records, accessible Safety Data Sheets, employee training, equipment inspections, and compliance with applicable pesticide requirements remain important parts of responsible farm management.
Organizations should also consider the conditions surrounding their fields. Nearby schools, homes, waterways, drainage systems, and other sensitive areas may influence the controls and planning needed for particular activities.
When evaluating alternatives to chemical treatments, businesses should look at the full picture. A promising method needs to protect crops while also supporting worker safety, environmental protection, operational efficiency, and long-term sustainability.
Collaboration matters, too. Farmers, researchers, equipment developers, regulators, and local communities can help identify practical solutions when they share information and evaluate new approaches carefully.
A More Sustainable Approach Starts With Better Decisions
California's work on soil steam treatment shows how agricultural innovation can address several challenges at once. The aim is to control soil-borne diseases, maintain productive crops, and explore ways to reduce reliance on certain chemical fumigants, particularly in areas close to sensitive community locations.
There is still more to learn before steam treatment can be considered a practical solution for every farm. Continued research will help establish where the technology works best, what it costs, and how it can be used safely and effectively.
For agricultural businesses, the opportunity is to remain open to new approaches while maintaining strong environmental health and safety practices today.
At Definitive Safety Group, we believe responsible operations begin with understanding risks, protecting people, and making informed decisions that consider both business needs and environmental impacts.
Because a healthier agricultural future depends not only on what we grow, but also on how we grow it.
#theDSGway
