What do I need to do?
We will be testing different herbicides and need a good supply of weed seed in each sample. (around a coffee mug full, or more if manageable) to complete all tests. Allow the samples to dry for a few days in a breathable bag or an open tray before sending. Download and fill in the form and include one with each sample, sending it to - John Cussans, NIAB, 93 Lawrence Weaver Road, Cambridge, CB3 0LE
Here Lindy Blanchard and NIAB's John Cussans explain more about the survey and how you can get involved: