There is still a tendency among some contractors to think that biosecurity is mainly a matter for MPI, regional councils, or the landowner.

That view is no longer tenable.

If you’re moving from property to property, paddock to paddock, orchard to orchard, you are a critical part of the system. Mud, plant matter, seeds and insects, all hitching a ride on tyres, boots, decks, wheels etc.

Lately there have been enough reminders that this stuff isn’t theoretical.

Velvetleaf is not just another weed. MPI classifies it as an unwanted organism, and it is one of the world’s worst cropping weeds. It competes hard for nutrients, space, and water, and overseas it has been reported to cut crop yields by up to 70%. MPI and regional guidance are very clear on one point: machinery needs to be cleaned before it leaves an affected property, with visible soil and plant matter removed.

Brown marmorated stink bug is an ugly little hitchhiker not established in New Zealand or Australia, but it is classed as an unwanted organism and MPI describes it as a serious agricultural pest that feeds on more than 300 host plants, including fruit trees, ornamentals, and field crops. This critter is very good at catching a ride.

So before anyone says, “Yeah, but I’m only drilling / baling / spraying” that’s the point. Contractors are mobile. Mobility is what makes it risky if standards are loose.

This isn’t just an “MPI issue” anymore. It’s a contractor issue. A professionalism issue. A trust issue.

When you roll onto a place, with half the previous job still hanging off the machine, the client does not think, “Hard-working bugger.” They think, “What else is he bringing with him?”

Velvetleaf alone should be enough to sharpen people up. It is spread by contaminated crops and machinery, and once it is on a property, it is not a quick tidy-up job. It changes management, it adds cost, and it hangs around.

So what does that mean in the real world?

It means communicating to staff that wash-downs matter. It means asking one simple question before you leave a property:

What could I be taking with me that shouldn’t be going to the next place?

It also means tracking your machinery properly.

If MPI, council, or a contracted specialist asks where a machine was and when, “I think we were on the Smith place Tuesday morning” is not going to save you.

You need to know:

• Which machine was on which property,
• Who was operating it,
• What time it arrived,
• What time it left,
• and where it went next.

Not written up two days later from memory either. You need something locked and uneditable. Proper, timestamped proof.

That matters more than people realise. In any biosecurity event, or even just a compliance conversation, the outfit that can produce clean records quickly looks organised and trustworthy. The one trying to piece the week together from text messages, worksheets and “pretty sure” memories looks sloppy, even if they have done nothing wrong.

So machinery tracking is no longer just admin. It is part of risk management. It is part of protecting your customers. And it is part of protecting yourself.

Ensure two things:

• You have a clear paper trail and system of communicating to staff when they need to wash down.
• You have a bullet proof report available to you if you ever are required to show evidence of the time and location of your machinery.