Trees can take a lot of adverse conditions. Imagine [...]
We have been receiving a lot of samples and [...]
Hot summers have consequences. Earlier this year the fungus [...]
I’m pretty sure Neil Young didn’t intend his song [...]
The intermittent rainfalls this spring in Western Oregon have been [...]
The same bacterium used to make artificial snow, Pseudomonas [...]
I have a sour cherry tree in my yard that declines a bit more each year. It is in sad shape, with seared-open main branches injured by sun scald and invaded by decay fungi. This all stemmed from leaf loss due to an ongoing and pervasive case of brown rot caused by the fungus Monilinia. This organism infects first through the flowers, usually after a rain while the flowers are open.
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.
Fungal diseases are often associated with intermittent rains and mild weather and the long hot days of late summer don’t seem ideal for fungal growth, but they are perfect for the powdery mildews.