A fungal disease (commonly Golovinomyces cichoracearum or similar species) appearing as white powdery patches on leaves and buds. It thrives in high humidity with poor airflow.
A central concern throughout the episode given Colombia's humid climate. Dakota was pleasantly surprised to find zero PM on the outdoor patio Smackdown and Banana Biscotti plants. Some autoflowers in the greenhouse showed heavy PM, and a nearby infected zucchini/squash plant was identified as a likely source.