Rhododendron Bud Blast

Rhododendron bud blast Common name Rhododendron bud blast Causal agent Rhododendron bud blast is a fungal disease caused by the Rhododendron leafhopper. The insect spreads the Seifertia azalea fungus by laying eggs on the buds, resulting in failure to bloom. Scientific name Graphocephala fennahi Symptoms & Signs The female leafhopper lays eggs on the inside of the bus by making a small incision. As a result, the fungus enters the plant through the incision wound. The buds turn silver or brown and form black bristles. It does not bloom and falls off prematurely. Transmission Rhododendron bud blast spreads by means of spores since it is a fungal disease. The black bristles that appear on the buds are fruiting bodies containing spores. The spores can travel to other healthy plants by means of wind, water, insects, or infected tools. Time of concern Late spring to autumn Common hosts Rhododendrons Azaleas