Christmas tree production has developed into an intensively managed agricultural crop. Consumer demands and production costs necessitate that growers maximize the production of high quality trees in as few years as possible. Management includes the effective use of herbicides that will contribute to increased survival, more rapid annual growth, less needlecast disease problems, and generally improved foliage and tree quality. When properly used, herbicides provide benefits not only during initial establishment and growth of the tree but also through the rotation when annual shearing and eventual harvest of the trees is completed. Major weed problems include various perennial and annual grasses (quackgrass, foxtail, fall panicum, etc), annual and perennial broad-leaved weeds (hoary alyssum, ragweed, milkweed, red root pigweed, lambsquarter, velvetleaf, spotted knapweed, Canada thistle, marestail, etc.).
Weed Identification and Management Resources
2017 Nursery and Landscape Pest Control Guide – North Carolina State University*
*Always read the label before applying any pesticide. Labels can and do change it is the responsibility of the person using this information to verify that it is correct by reading the corresponding pesticide label in its entirety before using the product.
Weed Id Tool – University of Wisconsin
Weeds of the Northeast – Cornell