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

Peach "X" disease

Causal organism: PHYTOPLASMA –LIKE ORGANISM.
SYMPTOMS

• The trees show varying degree of anthocyanosis, die-back twig and shoots and general tree decline.
• Infected leaves roll upwards on affected branches.
• Premature defoliation.
• Fruits remain small, malformed and abort without proper ripening.
MODE OF SPREAD

• It transmits through grafting , leaf hoppers and parasitic plants like dodder .
VECTORS

• Leaf hopper and dodder (Cuscuta reflexa)
MANAGEMENT

• Use ofjdisease free planting materials.
• Exposing the planting material to 37oC for 15- 39 days.
• Apricot seedling can be used as a resistant root stock.
• Removal of diseased host plants.