Dear , Ajay Gautam

You mean sooty molds ? If you mean that , you can see the following links and attachments :

https://www.na.fs.fed.us/spfo/pubs/howtos/ht_sooty/ht_sooty.htm

With my regards

Dear , Ajay Gautam

You can also find the following attached articles 

With my best wishes

Dear , Ajay Gautam

You can also see the following items , they may be help you 

http://www.henrystreet.co.uk/topical-issues-how-to-recognise-and-control-sooty-mould/

http://www.weekendgardener.net/plant-diseases/sooty-mold-010801.htm

Best greetings

Hi , Ajay Gautam 

So you find another articles on sooty molds such as the attached one 

Best regards

Hi , Ajay Gautam

I attached another paper and hope they help you in your project

My regards