14053: Prickle bush control in the East Kimberley
Whilst this project is about control, the overarching program target for three WoNs species (prickly acacia, mesquite, Mimosa pigra) is eradication. All species have been the subject of previous control activities.
These infestations are considered vitally important to control and eventually eradicate as they are positioned either in, close to or upstream of Ramsar sites and the Purnululu World Heritage Area and as such pose an immediate threat to those high value environmental assets. They are an immediate threat to pastoral production within the region hence the commitment from the Kimberley Rangelands Biosecurity Association for this program.
If left, these infestations would extend their foothold in their current locations and would spread initially within the region, and in the medium and longer term to other suitable regions within Western Australia including the Pilbara, Kalgoorlie region and much of the Kimberley. Their impact across Western Australia would be significant; carrying capacity of land could be reduced by 50% in areas, wetlands displaced and significant costs for its control would be borne by landholders on an ongoing basis as demonstrated in both Queensland and the Northern Territory where these species inhabit millions of hectares of land.
|Investment:||$ 50 000|
|In-kind contribution:||$ 205 000|
|Delivery organisation:||Ord Land and Water|
|Project duration:||February 2015 - February 2016|
|Location:||Western shore of Cambridge Gulf; Eastern shore Lake Argyle; Nicholson Station; Shire Wyndham East Kimberley and Shire of Halls Creek|
Purpose of project
This project proposes to meet this threat with well proven control strategies that have been used successfully since these programs began. They largely involve applying herbicides at critical times of the year and, in the case of the mesquite, capitalising on the existence on site of an introduced biological control agent that restricts seed development.
Kimberley Regional Biosecurity Association