Im not sure where to put this but I know there are some green fingered people out there, so thought Id ask a question...

We have just moved into a lovely house with an equally lovely garden. In the said garden is a "Silver Hills Manderin" bush (aka Citrus Riticulata 'Silverhills'). Its a nice looking bush but something else seems to like it more than me as it appears to have some sort of disease...

The pictures below show a healthy leaf and two (or many) leaves that are exhibiting the problem...

Any expert out there who could advise as to what the problem is and further, what is the solution to get rid of the problem and kill off the nasties as the plant is looking "worse for wear".


A Healthy Leaf:

photo 1 by Jon_Kelly, on Flickr


Unhealthy Leaf #1:

photo 2 by Jon_Kelly, on Flickr


Unhealthy Leaf #2:


photo 3 by Jon_Kelly, on Flickr


Thanks
Jon