Rainiers grown under tunnels. Growing cherry trees under tunnels continues to show potential for both organic and conventional cherry production. In the last two years, Michigan State University’s Dr. Gregory Lang has not applied any herbicides, fungicides, or insecticides inside the ­tunnels, saving money on the countless sprays that have been eliminated. For weed control, MSU horticulturist Lang uses black woven polypropylene cloth as a weed barrier under the tree rows in the tunnels. Lang said the cloth has a triple purpose—preventing weeds and warming up the soil in the spring while conserving soil moisture later in the summer. The […]