Sab and Amber wrap up National Science Week with an update on diabolical dieback in Western Australia, suckering tree species and soil drainage speeds.  06:28  How to do away with suckering Robinia trees 31:32 What's happening with dieback in WA? - with Mia Townsend from the Dieback Working Group 38:41 How to tell the difference between slow and fast draining soil.  Listen to the program live on Saturdays at 9:00AM on ABC Radio Perth and ask your questions by calling in on 1300 222 720 or text 0437 922 720 Subscribe to the podcast through the ABC Listen App, Apple Podcasts or wherever you like to listen.