A study was conducted on Phytophthora root rot and the susceptibility of Pacific Northwest conifers. Twelve species of conifer were tested for susceptibility to five species of Phytophthora. Report includes methods, results, conclusions, and recommendations.
A guide to help minimize the amount of leaching created by greenhouse and nursery container production water runoff. Topics include nitrogen leaching, overhead irrigation with recirculation of runoff, and computer-controlled pulsed-trickle fertigation.
An overview of the B.C. Ministry of Agriculture and Fisheries plant diagnosis clinic at Cloverdale. The author discusses the history of the clinic, types of specimens examined, identified diseases and associated crops, and grower losses due to disease.
The Oregon State University Department of Entomology affiliated author briefly discusses aphids and their impact on plants. Other topics also addressed in the discussion include control using natural enemies of aphids and management methods.
Information on methods designed to reduce and/or prevent pesticide resistance build up in insect or mite populations. Topics addressed include background information on resistance, pest biology, pesticide use, proper pesticide use and application.
A brief discussion about the honeylocust pod gall midge (Dasineura gleditschiae), a pest of Oregon honeylocust trees. The Oregon State University affiliated author addresses the biology and chemical control of the honeylocust pod gall midge.
An examination of different intermittent mist system control devices used for plant propagation. The author discusses a variety of control devices including but not limited to program repeating timer, light operated timer control, and multizone mechanical controller.
A study was conducted to determine the physiology of graft formations in Picea pungens 'Hoopsi' scions grafted on Picea abies rootstocks. The purpose of the study was to identify factors limiting grafting success and improve production techniques.
A discussion about Daphne X burkwoodii `Carol Mackie' for wider landscape use. Topics of discussion include plant origins, propagation experiments, effects of propagation date on rooting, effects of fertilizers on branching, and growing trials.
Information provided on the use of STS for cut roses based on previous research indicating STS improved the life of cut roses. The steps the authors include in the process are preparation of stock solution, deciding on treatment conditions, and preparing the solution.