Dinesh [Fernando] wrote : " a scale infestation... how do I know when the 
infestation is controlled"

Please read the following page :

http://www.bellaonline.com/articles/art33019.asp

and also the text to which our colleague, Susan Taylor, linked :

http://nathist.sdstate.edu/orchids/pests/scales.htm

************
It should be easy for you to get neem oil in Sri Lanka.
That natural insecticide should be very useful in controlling the infestation.

The best of luck with your orchid collection.

Regards,

Viateur 


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