Organic cucurbit crops face severe challenges including cucumber beetles that transmit bacterial wilt (BW), squash bugs that transmit cucurbit yellow vine disease (CWVD), squash vine borers, windborne mildews, and weeds. Row covers protect crops from pests and insect-borne diseases, but they also exclude pollinators needed for fruit set and can complicate weed management.

Mesotunnels constructed from 3.5ft tall hoops and covered by fine nylon mesh to exclude insect pests offer a durable, breathable, and affordable alternative to low tunnels with spunbonded fabric (which tear easily, overheat crops, and restrict growth) and costly high tunnels. Pollination is accomplished by opening tunnel ends or removing covers when crops flower, or by introducing pollinators into the enclosure.

Three years of field trials were conducted in Iowa, Kentucky, and New York to evaluate the efficacy of mesotunnels and various strategies for pollination and weed control in organic muskmelon and acorn squash. Researchers documented crop yields, pest and disease levels, and net economic returns and published practical guidance for organic cucurbit production in mesotunnel systems.