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Woven brass screen with a regu-High-density polyethylene sheet, High-density polyethylene sheet, High-density polyethylene fiber lar weave. male surface. female surface. screen. Screens can exclude certain pests from greenhouses and therefore reduce the need for pesticides on greenhouse crops. They can perhaps also be used to create a small production area for biological control organisms within the greenhouse. When selecting a screen for either use, the pore size in the material is andoi:10.3733/ca.v048n03p37 fatcat:kl4drfiusbbw5krkysqie3xfpm