Diseases of fruit plantation medicinal and aromatic crops (2+1)

Minor disease

Pink disease
Causal organism: Pellicularia salmonicolor ( Berk. & Br.) Dastur

• A number of fine, silky threads packed into a thin film appear first on stem. It is found on leaves. Fungus forms pink fructifications over infected stems.
• Young branches on the outside of the bush lose their leaves and die-back.
• The pink concentrations crack into small fractions at right angles.
• They are generally confined to lower side of branches. Bark killed in patches.
• When the branch increase in thickness, it grows only in areas where bark is dead. So branch becomes irregularly swollen.Pink tissue becomes white when old.
• Basidiospores are wind-borne.
• The disease first appears on border was adjacent to jungles. Addition of potash in the soil promotes recovery. Very difficult to eradicate by removing of infected plants.