The fungal plant disease "Anthracnose", Gloeosporium nervisequum, occurs when the conditions are favorable for fungus growth and a suitable host is available. The author describes the various symptoms of the disease and provides a partial list of susceptible hosts.
The Oregon State University affiliated authors discuss fertilizers for container grown plants and the different factors to take into account when making or buying a fertilizer mix. The North Willamette container mix and suggestions for use are included.
A discussion about English holly regarding fertilization suggestions made by A.N. Roberts and R.L. Ticknor in their previously published paper on commercial production of English holly in the Pacific Northwest. The author discusses the recommendations made by Roberts and Ticknor.
Research was conducted on bulbous Iris forcing at the Puyallup satellite of the USDA - SEA Ornamental Plants Research Laboratory. The focus of the research was growth media and fertilizer treatments in an effort to establish more efficient pretreatment schedules.
As the popularity of foliage plants from subtropical and temperate climates increased in the Pacific Northwest, so did the incidences of cyclamen mite (Steneotarsonemus pallidus Banks) infestations. Descriptions and lifecycle of the mite, symptoms of damage, and controls are discussed.
The use of sawdusts and barks in media mixes and mulches is addressed by the Oregon State University affiliated author. The results of tests conducted to test the phytotoxic effects of two species of fresh bark are discussed along with recommendations.
The University of Florida affiliated author addresses how to avoid pesticide phytotoxicity in ornamental plants. The five most common types of phytotoxicity identified are; burn, necrosis, chlorosis, leaf distortion, and stunting or abnormal growth.
Concern was growing about increasing Black Vine weevil populations in the winter of 1976-77. Part of the reason for concern over the weevil infestation was the lack of approved pesticides for the weevil. The authors discuss possible control methods and encouraged growers to learn about the Black Vine weevil.
Water availability for the upcoming growing season was a concern due to an unusually dry winter. The author discusses the legalities of Oregon water rights regarding greenhouse and nursery crops. Several different types of irrigation permits are addressed along with where to obtain them.
The Oregon State University affiliated author discusses implementing preventative disease control programs for a wide variety of perennial plants. A list is provided of the many different perennials grown in the pacific northwest and the diseases they are commonly associated with.