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A Scientific Look at Diseases of Kentucky Hemp


Hemp Variety Screening for Susceptibility to Powdery Mildew

Greenhouse grown seedlings, cuttings, and stock plants are often susceptible to a fungal disease known as powdery mildew; however, susceptibility to powdery mildew differs by cultivar.

  • Characterized by powdery, white spots powdery mildew infects leaves, buds, and other young tissue affecting product quality.
  •  Hemp powdery mildew is caused by the fungus Podosphaera macularis and is identified by its upright chains of barrel-shaped spores.
  • Powdery mildew is predominantly a greenhouse disease.
  • There are no fungicides labeled for use with powdery mildew of industrial hemp.
  • Susceptibility is dependent on individual cultivar.