First report of causing root rot in (L.) in California.

In June of 2020 we observed greenhouse grown in Sonoma County, CA and Monterey County, CA showing stress symptoms: stunting, leaf chlorosis, and leaf senescence, when moved to flower production conditions. We uprooted symptomatic and healthy plants and observed disease symptoms only in symptomatic plants: reduced root mass, reduced root hair density, and necrosis. Roots and growth substrate samples were taken from infected and healthy plants for further analysis.

First report of causing crown rot in greenhouse grown (L.) in California.

In April of 2020 cuttings of (L.) in a greenhouse in San Mateo County, CA were observed collapsing, and further observation revealed: water-soaked stems, tan discoloration to the cortex, and discolored roots. The greenhouse irrigation system was supplied by a local stream.