Utah State University Extension
In agricultural use, a row cover is a transparent or semitransparent material that is used over crops (typically vegetables) for a variety of purposes. As an integrated pest management tool, row covers act as a physical barrier that prevents the movement of pests such as insects, birds, and mammals, to host plants. This form of management is popular in organic production to avoid chemical application. Row covers are also used to shield crops from environmental factors like cold or hot temperatures, and wind. Commonly used methods of application include floating row covers, hoop-supported row covers (also called low tunnels), and plastic-covered trenches. This fact sheet reviews materials, construction, pest prevention, maintenance, and the advantages and disadvantages of row covers.
Volesky, Nick and Wagner, Katherine, "Row Covers" (2020). All Current Publications. Paper 2146.