The official blog of the Oregon State University Plant Clinic

Propagation pitfall: Leafy gall disease

Now is the time when nurseries are propagating plants for the upcoming spring season. Odd looking plants with too many shoots or buds could be infected with the pathogenic bacterium Rhodococcus fascians. Propagators should be alert for symptoms, as shown in the gallery below, and have suspicious plants tested for the presence of the bacteria.

November 12th, 2019|Categories: Leafy gall, Plant disease|

Botrytis on hemp… it’s in the news!

The weather this fall has been ideal for development of molds (like Botrytis) in the tight colas of the hemp plant. The alternating cool and moist weather followed by a few clear days of moderate temperatures have been perfect for the moisture-loving fungus. Which translates to bad news for the growers, who depend on the flowers for their CBD-related products.

October 8th, 2019|Categories: Botrytis, Hemp|

Missing Something: Vole damage to plants

Plants that appear to be doing well in the spring, but then crash in the heat of summer could be missing something – literally. We have received a number of different woody plants showing poor vigor, reduced growth, sun scald on the leaves or stems, small leaves, and branch dieback, all leading to a slow decline of the entire plant and eventual death.

September 17th, 2019|Categories: Uncategorized|