Bacterial wilt  Burkholderia caryophylli

Symptoms

• The upper parts of established plants turn pale and wilt.  The stem develops elongated discolored stripes and split open which is characteristic of the disease.
• The roots are rotted partially and the cortical tissues become sticky and shows discoloration, a tendency to straighten out instead of remaining curled.
• The leaves are twisted.  The roots are generally lacking on one side and remain discolored.  The base of the cutting is discolored, with an elongated brown area extending upwards. 

Wilting	Elongated discolored stripes

Management

• Use of cuttings taken from upper parts of the healthy stock plants are less liable for infection and hence advocated as a control measure. 
• Diseased plant debris should be collected and burnt.  Overhead watering and splash watering should be avoided. 
• Disease-free planting materials are to be used.  Role cultivars viz., Elegance, Northland and Starlite are less susceptible to bacterial wilt.

Image source: University of Agricultural Science, GKVK, Bangalore