First report of Pythium ultimum causing crown rot in greenhouse grown Cannabis sativa (L.) in California

First report of Pythium ultimum causing crown rot in greenhouse grown Cannabis sativa (L.) in California

In April of 2020 cuttings of Hashish sativa (L.) in a greenhouse in San Mateo County, CA had been noticed collapsing, and additional remark revealed: water-soaked stems, tan discoloration to the cortex, and discolored roots. The greenhouse irrigation system was provided by an area stream. We collected one-liter water samples from: consumption pond, reservoir tank, irrigation...