I'm using "Sunniland Coppercide" and neither of my two mangos are having a current problem. Could it be that you are diluting it too much?

I recently bought a 32 ounce bottle of Bonide. I also got a 1 gallon sprayer. I mixed 5oz with a gallon of water. The sprayer released the mix in a fast fine spray so it clung better on the leaves and made it easier to reach under leaves and deep into the branches...so far so good for my scale problem and fungus! One within a week of the first application everything started growth flushing and no issues. I had tried the Copper and Neem Oil and it wasn't working.The Bonide was pricey $20 for the 32 oz. size but I think it was worth it.
here is a link someone posted of a picture of the bottle:

http://s907.photobucket.com/albums/ac271/vapordoc/?action=viewät=987e6897.jpg

marin, that Bonide product looks interesting. Pricey, perhaps. But if it works, well worth the cost. Were you able to buy it locally? I don't recall seeing it any the Home Depot, but then again I wasn't looking for it.

HI Carbos, So far I think it's working better and worth the $20. I did get it at Home Depot.

Thank you, marin. I see my local Home Depot shows it being in stock on their website. I'll pick some up and give it a go.