Practical 12 - Practical in Plant Disease Diagnosis

Field diagnosis : Procedures


1. Compare symptom and hosts with past records

In this practical , our group using the following hosts and symptoms :

• Rhapis excelsa , necrosis disease

non-infected host 

infected host 

• Cucurbits host, necrosis disease

non-infected host

infected host

  

• Mosaic disease

non-infected host (left) and infected host (right)

• Necrosis disease

non - infected host

infected host

2. Identification of pathogens

• Isolate and make pure culture of the pathogen 

1) Cucurbits host - necrosis disease
2) Necrosis disease
3) Rhapis excelsa - necrosis disease
4) Mosaic disease