Botrytis Cinerea

Plant Disease
Botrytis blight ( Botrytis cinerea), also known as grey mold, is one of the common diseases of greenhouse crops. Descriptions of general symptoms and symptoms on flowers, leaves, seedlings, and stems are provided along with cultural and chemical management programs.

European Crane Fly

Insects
Washington State University affiliated entomologist discusses the European crane fly (Tipula paludosa) and it's impact in the Pacific Northwest. Topics addressed include it's introduction into North America, lifecycle, biological and environmental controls, and chemical controls.

The Columbia Root-Knot Nematode Problem

Management
In 1982, new regulations were put in place by Canada in an attempt to limit the Columbia root-knot nematode from spreading to Canada. In regard to the nematode, the author discusses; the problem, distribution, habitat, life cycle, hosts, and controls.

A Root Weevil Perspective

Insects
Root weevils can be a serious pest for Oregon growers of ornamental plants, the root weevil feeds on more than 100 plant species. The author offers a brief but informative discussion on the life cycle, root and foliar feeding, control of adult root weevil, and larval control.

Weed Control in Nurseries and Ornamental Plantings

Weeds
A partial list of herbicides for perennial weed control intended for nurseries and ornamental plantings. The author addresses correct weed identification, weeds controlled and not controlled by the herbicides, terms used in weed control, and application methods.

Gypsy Moth in Washington

Insects
The gypsy moth was detected in the Seattle, WA area in 1977 using pheromone (female sex scent) traps. The author discusses the gypsy moth in regard to; local history, the problem involving gypsy moths, eradication efforts, and the efforts nurseries could make.

Factors to Consider Before Tank Mixing Pesticides

Management
The dangers of tank mixing pesticides are addressed by the University of California affiliated author. The factors discussed include; chemical incompatibilities, physical incompatibilities, general principles for mixing pesticides, specific mixtures to avoid, and causes of phytotoxicity.

Food for Thought on "Poisonous Plants"

Greenhouse Crops
An informative discussion about "poisonous plants" and the need to be educated about plants so we not have to live in fear of them. The author also discusses a book called "Name Your Poison, A Guide to Cultivated and Native Oregon Plants Toxic to Humans".

Progress in Tissue Culture Propagation of Ornamentals

Plant propagation
Research was conducted on the propagation of rhododendron, apples, raspberries, strawberries, lily bulbs, iris bulbs, Kalmia, Daphne, and arctostaphylos by tissue culture at the Northwestern Washington Research and Extension Unit.

The Influence of Stress on Diseases of Nursery and Landscape Plants

Plant Stress
A discussion of the influence stress can have on diseases of nursery and landscape plants. The author addresses the increased susceptibility to disease when plants are weakened by stress, drought or water stress, excess water stress, and high and low temperature stress.

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