Steam has been used successfully to disinfest soil in greenhouse production since the 1880’s. The steam heats the soil enough to kill weeds, pathogens, nematodes and more.
Steam can be just as beneficial in the field, but can be slow and expensive. The old method is simply extremely inefficient; however, new methods and equipment are being developed to improve speed and cost and reduce energy consumption.
Why the interest in steam? Steam is a flexible non-fumigant option for growers who are producing crops in which fumigants are commonly applied. At this time steam systems appear most practical in: organic fields, buffer zones, and in areas with high fumigant demands.
A group of UC scientists are testing an assortment of soil disinfestation techniques, looking for the best combination of effectiveness and reasonable cost including combining steam and solarization or by using solarization alone.
The researchers on this project are collaborators of Farm Advisor Oleg Daugovish. A presentation of the study was given at a recent fumigants update meeting at the Ventura County Cooperative Extension office. This presentation has been archived on our website with sound.