To celebrate Biosecurity Awareness Month, Blue Shed Diary is talking to the people charged with keeping New Zealand safe from pests and disease. Agrichemicals are one of the tools in the tool chest, but what happens when one of those tools is gone? What goes into that decision? And how do we get new tools in our toolboxes?

Joining the conversation is Dr Shaun Presow of the Environmental Protection Authority. He is the Manager of Reassessments and Acting Manager of Hazardous Substances Applications.