Dirty boots can pose a very real risk to your property. People can unintentionally carry pest or disease-causing organisms on unwashed footwear, bringing them on to your farm without even realising it.
Soil-borne pests (like phylloxera, anthrax, Panama disease) and weed seeds are carried in dirt and mud. Pieces of infected plant material, manure and soil itself can carry diseases directly from one farm to the next.
A very simple way to manage this biosecurity risk is to ensure that visitors and staff who need to access your production areas thoroughly wash and disinfect their footwear.
In particular, high risk visitors who have been on other farms in the area recently should be asked to clean their shoes or change their footwear before moving onto your property.
People who are simply dropping in at the house and not coming into contact with your crops or livestock are a low risk and do not need to do this.
There are three simple rules when allowing visitors and workers to wear their own footwear in your production areas:
- Check all visitors and workers boots and ask where they were worn previously
- Clean footwear with a brush to remove debris, and then wash with water to remove all visible plant material and soil
- Disinfect footwear using a footbath containing a strong sanitising product. You could also use a spray bottle to treat shoes with a disinfecting solution. Be sure to follow the use instructions on the product label.
Before washing, use a strong bristled brush to remove all visible debris. Boots should be free of dirt, mud, manure and plant material before using the footbath. These kinds of organic matter quickly contaminate the water and prevent the disinfectant from killing germs, so the boots need to be generally clean before you wash and disinfect.
The footbath should be a container which allows easy access. Ensure the container can fit a large boot so that the liquid saturates all parts of the footwear. Adding some soap or detergent to the water can clean better than using water alone. If shoes were very dirty to begin with, use the scrubbing brush while standing in the soap solution to thoroughly clean the soles of the shoe.
- For maximum cleaning a disinfection step should follow the washing step.
- A second footbath should contain disinfecting products. These must be refreshed regularly as build-up of dirt and rain water in these solutions will lessen their effectiveness.
- You can use bleach diluted to 1% active sodium hypochlorite (the active ingredient in bleach). For example, dilute a bleach solution which is 4% active sodium hypochlorite using three parts water to one part bleach.
- Any other farm detergents and disinfectants can also be used as per label instructions.
- As leather or fabric shoes can be damaged by prolonged exposure to disinfectants, a final rise with fresh water is advised.
An alternative to washing boots every time someone enters or exits a production area is to provide visitors or workers with a change of shoes (e.g. gumboots) or disposable shoe covers that are only worn in the production areas. This will minimise the chance of transferring diseases, pests or weeds both on and off your property.
The boots will still need to be washed to keep them generally clean, but because they are only being worn in the production area they will not be a source of new diseases, pests or weeds.
Footbaths are a useful and inexpensive method of cleaning footwear before entering and exiting production areas of a property. To set up a footbath station you will need:
- heavy-duty scrubbing brushes and scraping tools such as a horse pick or a screwdriver
- at least two heavy-duty plastic containers
- water for the footbath and rinse tub
- registered decontaminant (check the APVMA database; see below for further details)
- drying material: something clean, porous and non-slip, such as hessian bags, rubber mats or towels and
- a tarpaulin (if footbaths are to be placed on a dirt surface).
Preparing the footbath
Set up each footbath station on a flat surface.
- Fill the first plastic container with clean water for washing off any soil and plant material prior to the decontamination process.
- Fill the second footbath with a registered decontaminant to prevent the spread of soil-borne diseases. Follow the label instructions.
- Lay drying material after each of the clean water and decontamination footbaths.
Scrubbing brushes and scraping tools should be provided to guests to assist with cleaning.
After the footbaths have been used, dispose of the water and decontaminant away from production areas and water sources. Take note of label instructions for disposal of the decontaminant.
For more information about disinfectants registered for use in Australia you can search PubCRIS, the APVMA’s Public Chemical Registration Information System, using ‘disinfectant’ as the search term. Go here and scroll down to see the results.
If you click on ‘Export CSV’ at the top right of the list of products, an Excel spreadsheet will be downloaded which includes information about recommended uses for the product. Alternatively, if you click on the ‘View details’ tab, and then then “Host/pest’ tab you’ll see the product uses. For example, you will know if the product is for use on vehicles, or hard surfaces, animal stalls, hands, minor surgery equipment, irrigation equipment, footwear and so on.
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