Little leaf of brinjal

Little leaf of brinjal or eggplant ("Solanum melongena" L.) is one of the most serious diseases of brinjal in the areas of its cultivation.
Control Measure 
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Insecticides can be sprayed for vector control. 
Crop rotation ensure death of disease-causing pathogen.
Use of disease resistant crops.
Spray of varavion at regular interval of 15 days.
Tetracycline antibiotic can also be used to treat the disease.
Overview.
Little leaf of brinjal is known to cause heavy economic losses in India. As the name indicates, symptoms of the disease include shortening of the petioles and production of leaves which are much smaller in size. Petioles are so short that leaves seem to be glued to the stem. They become soft and glabrous and somewhat yellow in colour. Affected plants do not bear any flowers or fruits if infection is in early stages of plant growth. However, in cases of late season infections fruits may remain small, become hard and unfit for consumption or marketing. The disease is caused by a plant pathogenic mollicute, "Phytoplasma" (earlier known as mycoplasmalike organism or MLO) and is transmitted by the insect vector, "Hishimonus phycitis" which belongs to the group of leafhoppers.
Management of the insect vector by means of insecticides and cultivation of resistant varieties are the principal means of management of the disease. Newly formed leaves are further reduced in size.