Fig. 1

Severity rank of detached leaf. (0): no symptom; (1) Number of black holes less than 3; (2) Number of black holes between 4–7; (3) Black holes connected together; (4) Black spread outside of the wound; (5) Less than 3 holes filled by hypha; (6) Number of holes filled by hypha between 4 to 7; (7) The hypha mixed together; (8) Yellow symptom started; (9) Yellow symptom fill 50 % of the leaf area (10) The red symptom showed