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weed and seed washdown

It is an offence (under Section 270 of the act) to disobey any directions given by an authorised person (as defined by the act) who directs you to stop your vehicle.

There are Weed & Seed Wash bays that are open to the public. These are maintained by the local council of that area.

What’s Involved in a Weed & Seed Wash

When entering a property, you may be requested to provide record of the vehicles Weed & Seed Wash history (Weed Hygiene Declaration), or else be refused entry.

This guide was created primarily for use as a reference only and we encourage you to check the local and state requirements for your destination.

Do you need a Weed Hygiene Declaration or a Vehicle Hygiene Inspection Report?

Vehicles are one of the major vectors of long-distance weed seed spread. Viable seed removed from vehicles at roadside wash down facilities was studied at five locations in central Queensland, Australia over a 3-year period. Seed from 145 plant species, belonging to 34 different families, were identified in the sludge samples obtained from the wet particulate matter collection pit of the wash down facilities. Most of the species were annual forbs (50%) with small or very small seed size (<2 mm in diameter). A significant amount of seed from the highly invasive, parthenium weed was observed in these samples. More parthenium weed seed were found in the Rolleston facility and in the spring, but its seed was present in all facilities and in all seasons. The average number of viable seed found within every ton of dry particulate matter removed from vehicles was ca. 68,000. Thus, a typical wash down facility was removing up to ca. 335,000 viable seed from vehicles per week, of which ca. 6700 were parthenium weed seed. Furthermore, 61% of these seed (ca. 200,000) were from introduced species, and about half of these (35% of total) were from species considered to be weeds. Therefore, the roadside wash down facilities found throughout Queensland can remove a substantial amount of viable weed seed from vehicles, including the invasive parthenium weed, and the use of such facilities should be strongly encouraged.

Keywords: Invasive species; Parthenium weed; Prevention; Vehicle wash down facility; Weed control; Weed seed spread.

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