HOW TO DEAL WITH COMMON CANNABIS PLANT PATHOGENS: GREY MOULD

seedman

Welcome back to Seedsman’s series on common pathogens, where we look at identifying, avoiding, and treating some of the most frequently-occurring problems faced by cannabis growers. In our first article, we investigated powdery mildew, and today, we’re bringing grey mould in for questioning. Grey Mould aka Bud Rot (Botrytis Cinerea) What is it? Grey mould is another fungal pathogen cannabis growers must guard against. A common headache for farmers, this unwelcome nuisance can be found on numerous crops, including vegetables, soft fruits, flowers and shrubs.  Some argue grey mould is a cannabis grower’s biggest threat, and it can destroy an entire crop in a matter of days. If you spot it lurking in your plants, you’ll have to act fast. What does it look like? Grey mould is easily seen, although harder to identify in the early stages. It can attack every part of the plant, but is most commonly found on buds during the late stage of flowering. Look out for grey-ish webbing appearing on the leaves. Structures within this webbing contain fuzzy spores, which are then activated and released. Symptoms of grey mould include grey/brown colouring, and dry or lifeless, wilting leaves which may fall apart when touched. What does it do? This is a particularly devious adversary, and doesn’t only attack the plant during the growth phase. If plants are not harvested under the proper hygienic conditions, using sanitary practices, grey mould can still appear after harvesting. At this stage, the mould will begin decomposing the buds, and will transmit through the seeds, rendering your yield completely worthless. The grey-ish webbing which appears on the leaves is made up of structures which contain fuzzy spores. These spores are then easily activated, and released, spreading and decimating the plant. Why does it happen? As with powdery mildew, grey…

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