Oleander Disease - but what is it?

we're living in Kenya and our 3 oleandears could grow in the soil.
One started to show symptoms of a disease a few month ago, I cutted the shrub to see if it's coming again and also the other showing first Symptoms. I've attached 3 pictures:
- it is starting with curling leafes
- than you see spots / damages on the branch
- the young shoots are getting dry completly
Could you give my any hint?
http://lh6.ggpht.com/_KsO424Vsp90/TFF-YleinQI/AAAAAAAABAQ/7ygiISyuC-g/IMG_8586.jpg
http://lh3.ggpht.com/_KsO424Vsp90/TFF-Y4EK91I/AAAAAAAABAU/i_VQW0ACnJI/IMG_8587.jpg
http://lh5.ggpht.com/_KsO424Vsp90/TFF-Y2CI_II/AAAAAAAABAY/DiYqwuiaTxc/IMG_8572.jpg

 

I wouldn't like to guess as to what your oleander problem might be istria, I think your growing conditions must be very different to growing in the UK.

I have had a problem with oleander in the past and it involves the stems turning black and the above growth dieing, but it may be very different to what your experiencing.

 

Hello istria and welcome to GC.

You say your Oleanders 'could' grow in soil ... are they in pots? If so, perhaps you have a vine weevil in the pot .. you would need to take the plant out and examine the roots for this.

I grow Oleanders here, doubles, 4 meters tall. I don't have any problems in general with them but every other year get the aphid problem and I hose it off.

To be honest, I don't know what your problem is but could be ..

http://www.pestproducts.com/oleander.htm

So, that is my offering and hopefully you can resolve your problem and please let us know the outcome.