Diseases of Fruit Plantation Medicinal and Aromatic Crops

Little leaf of grapes

Causal organism: Phytoplasma like organism .
Symptoms


• The leaves on infected vines become extremely small and develop light yellow colour.
• Internodes and stems are reduced to a great extent and develop in zig-zag fashion.
• Axillary buds proliferate. Flower and fruits do not develop on infected vines.
• Roots become stunted and only a few weak rootlets develop.


Transmission


• This disease is transmissible by grafting or budding.
• A temporary remission of disease symptom can be obtained by heat therapy (45-500C) and also when bud woods were treated with oxytetracycline hydrochloride (1,000 ppm)