How to treat Pencil Pine balding on one side in Queensland?

[my2108]

I have a few pencil pine at my front yard and they have been healthy and require fairly low maintenance. 

But recently I found that the youngest two pine of the brunch are getting bald on the right side of lower trunk.    I attached two photos here, the first one was taken from the heavy one, and the second one was taken from the two balding ones.

Is there anything I can do about it.  Is that because of all the heavy rain here in queensland?  Cos the sick ones are both located at the downside of a small slope.

[JacobZ]

Hi @my2108,

You would mix 5ml of the Yates Liquid Copper Fungicide with 1L of water, mix it well, then apply it to the soil and the plant.

Hopefully this will help.

Jacob