Came back from holidays to find my creeping boobialla infested with a great web which I first though was spiders but found green caterpillars underneath the web (againsts the foliage). It is killing the plant. Can anyone tell my what they are and how to get rid of them.
photos http://img813.imageshack.us/img813/3803/dsc03033a.jpg
http://img593.imageshack.us/img593/417/dsc03034q.jpg