The 5 Most Common Cannabis Plant Pathogens, and How to Deal With Them


They say a good host makes a great party. Pathogens would certainly agree. If you’re overly-hospitable, these uninvited guests will gatecrash, invite their friends over, and leave your place in ruins. In this blog series, we’re going to take a look at five of the most common pathogens which can threaten your cannabis yield, and ways to be a more ruthless bouncer. Without further ado, let’s meet our first troublemaker. PART 1: POWDERY MILDEW (Erysiphales, Podosphaera Macularis, Blumeria Graminis) Powdery mildew (PM) can affect a whole range of crops and plants, from wheat, barley and other cereals, to onions, apples, pears and melons. Unwelcome at any event, PM will arrive at your party empty-handed, and fill its pockets with all your valuables. What is it, and what does it look like? A nasty and fairly common fungal disease with a penchant for destroying plants.  Powdery mildew is a symptom caused by one of the previously mentioned fungal species, with Podosphaera xanthii being the most commonly reported cause.   As its name suggests, this nuisance is identifiable by the white or greyish-white powdery substance, similar in appearance to flour, which is easily seen on the surface of the plant. The lower leaves of the plant are most affected, but this mildew can appear on any above-ground parts of the plant. What does it do? One of the more recognisable cannabis pathogens, this most unwelcome of guests will move in and wreak havoc fast. It spreads both sexually and asexually, and excels at two things – destroying and spreading. As the spores spread from the leaves and base to the flowers and buds via air currents, germinating on the leaf surface, PM will destroy a plant by suffocating the plant’s ability to obtain nutrients essential to sustenance and growth. Patches typically begin…

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Source : The 5 Most Common Cannabis Plant Pathogens, and How to Deal With Them

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