Course Content
Terminology Related to Lawn, Garden and Landscape Design
Learn Ornamental Horticulture with Braimy – B.SC agriculture
About Lesson
  1. Die Back (Diplodia rosasium): Very serious disease of roses and appears after pruning.

The drying up and blackening of pruned shoots extends downwards.

Control: Pruned cut end should be painted immediately with fungicidal paint.

  1. Black sport (Diplocarpon rosae)

– Affect in Nov-March, circular black spot in the leaves (<1cm size)

– Leaves becomes chloritic, dry up and drop

Control: Spraying 0.2% Captan.

  1. Powdery mildew (Sphaerotheca pannosa)

– Affect in warm humid and cool weather

– Young shoots and leaves are covered with white powdery growth

– Flower bud fail to open

Control: Dusting 50% Sulphur.

Join the conversation
Scroll to Top