Advantages of an Effective Weed Control Program for Populus Hybrids

Abstract

Two weed control programs were used to establish two intensive-culture short-rotation plantations containing Populus maximowiczii x trichocarpa hybrid (NE-388) in central Pennsylvania. As compared to mechanical weed control only, a combination mechanical and chemical weed control program reduced the establishment phase for this clone to less than 1 year. Net results of the mechanical-chemical weed control program, as compared to mechanical only, were greater average tree size variables and total tree ovendry weight at the end of a 4-year rotation. When considered as a marginal investment proposition, the discounted value of the added yield was greater than the added cost of the chemical weed control measures. Tree Planters' Notes 43(3):81-86:1992.