Botrytis, or Gray Mold, is probably the most common disease affecting cannabis crops worldwide. It is very prevalent when humidity is high during the flowering stage of the cannabis plant. When humidity is high, the fungus develops a gray mold on the affected tissues, a characteristic feature of this disease. The mold is a layer of mycelium and fruiting bodies with numerous conidia that cause secondary infections, while the mycelium invades the rest of the affected tissue. When humidity is low, the mycelium that develops is tan and appears as leaf spots.<\/p>\n
In severe cases, the fungus can cover the tips of the cannabis plant with its mycelium. These plants must then be discarded due to their high toxicity.<\/p>\n
This fungus attacks cannabis at all stages of its growth. In seedbeds, it can attack seedlings from a very early age and even during germination.<\/p>\n