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Polyethylene mulches are widely used in vegetable production. Advantages include improving yields, controlling weeds, and enhancing quality. However, the removal and disposal of plastic mulch used for vegetable production represents a significant financial cost for farmers and can be detrimental to the environment. A study was conducted in Fall 2007 and Spring 2008 evaluating the performance of paper mulches for the production of summer squash (Cucurbita pepo ssp. ovifera) ‘Conqueror III’. Four paper mulches, 50-lb kraft paper, 50-lb polyethylene-coated kraft paper, 40-lb white butcher paper, and 30-lb waxed paper were compared with 1-mil black polyethylene mulch, bare-ground hand-weeded, and bare-ground nonweeded treatments. Mulches were placed using a traditional plastic mulch layer and seedlings were transplanted using a water wheel transplanter. Crop yield and quality, weed biomass, soil temperatures under the mulch (Spring 2008 only), and mulch degradation were evaluated. Most paper mulches were able to be placed with a mulch layer, but were not well suited for use with a water wheel transplanter. In Fall 2007, butcher paper and polyethylene-coated kraft paper controlled weeds as well as black plastic mulch. However, in Spring 2008, black plastic mulch provided superior weed control compared with other mulches. Yields among waxed, butcher, and polyethylene-coated kraft papers were similar to black plastic mulch in 2007, though yields in paper mulch plots were significantly less than plastic mulch in Spring 2008. The results of this study suggest that although paper mulches can be effective, cropping conditions and the environment will influence effectiveness.

Performance of Paper Mulches Using a Mechanical Plastic Layer and Water Wheel Transplanter for the Production of Summer Squash