Apple scab, that fungal disease known to just about anyone who had grown an apple, can convert a promising young fruit into a disfigured, unappetizing reject. Although safe to eat, in this day of readily available perfect fruit, we would rather do without scabby fruit.
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.
Boxwood blight is a relatively recent disease that is devastating Buxus plants on the east coast, and which has made limited inroads in Oregon.
The cannabis aphid is a pest aphid found on the leaves and stems of cannabis. Aphids have "piercing-sucking" mouthparts to feed on plant fluids. When aphids occur in high numbers, their feeding can stress plants and cause wilting, yellowing and other damage. Cannabis aphids are also potential vectors of plant pathogens.
Jerusalem crickets seem to fascinate those who find them. Also known as potato bugs, devil’s babies, and niña de la tierra (child of the earth), they are members of the genus Stenopelmatus and are related to katydids and cave-dwelling camel crickets.
Plants require soils that allow their roots to exchange oxygen with the soil, soils in which their roots can expand and grow, and that have adequate moisture retention capability. Trees surrounded by paving have limitations to all these necessary conditions.
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.
The practice of making a planting hole with an auger [...]
Squirrels go after more than acorns on oaks, sometimes to the point where people become alarmed that the trees are diseased.
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.