This full-color, English and Spanish field guide is for tree growers and field workers. Learn to identify and treat diseases, pests, disorders and damage affecting Christmas trees.
To keep your lilacs looking their best, they need to be pruned, fertilized and shaped almost every year, soon after they are done blooming in the late spring.
Pacific Northwest blueberry growers must identify and control a number of bacterial and fungal diseases in order to ensure the highest yields. Fortunately, only a few of the diseases that occur on highbush blueberry in this region cause significant losses when left unchecked.
Jay W. Pscheidt, Jerry Weiland |
Mar 2015 |
Article
Excessive summer irrigation of oak and madrone trees may promote fungal diseases such as the oak root fungus (aka armillaria root disease) and crown rot.
This publication offers an integrated approach to effective weed management in Christmas trees, incorporating diverse strategies and practices to keep weed populations off balance. It includes strategies for using ...
Ed Peachey, Chal Landgren, Tim Miller-Morgan |
Dec 2017 |
Extension Catalog publicationPeer reviewed (Orange level)
Photo by Judith Ann Kowalski (Cropped from original)
The Extension Service Christmas tree specialist has answered thousands of questions over the years. Those questions usually lead to more questions that require careful observation and a detective's mindset to solve.
Damage assessments after the historic heat wave of June 2021 in Oregon provided lessons for the state's Christmas tree growers. Those assessments showed how damage varied by type of tree and location of farms.
Each Christmas tree species requires special skill and specific knowledge to be grown successfully. This publication outlines how trees grow and the culturing practices necessary to develop the size, shape, and ...