Causal Agent: 

Abiotic (Physiological disorder)

Characteristic Symptoms:
 

Affected leaves often show marginal chlorosis or necrosis.
   
Conditions for Disease Development
 
Chemical injury or toxicity usually occurs during hot and extremely windy periods.
   
Management and Control:
 
Apply pesticides in accordance with label instructions.
   
Avoid spraying of pesticides on extremely windy conditions.
   
Avoid pesticides applications when plants are under water stress.
   
Apply pesticides at proper time, rate and using the right application techniques.
 

References:

Compendium of Cucurbit Diseases (2010) by The American Phytopathological Society

 

To view other diseases,  click here.

Need more help?  Ask the Doctor.