1960’s – 1980’s: Spray Workers Ord River Exposed: Pesticides 2,4-D, 2,4,5-T

SECOND SESSION OF THE THIRTY-SIXTH PARLIAMENT REPORT OF THE STANDING COMMITTEE ON ENVIRONMENT AND PUBLIC AFFAIRS IN RELATION TO CHEMICAL USE BY THE AGRICULTURE PROTECTION BOARD 1970-1985

In the Kimberley region, 2,4-D was used for Noogoora Burr along the Ord and Fitzroy Rivers. 2,4,5-T was used for broad-leafed weeds along the Ord and Fitzroy Rivers, on Christmas Creek Station and in other locations. 2,4-D was mixed with water and applied using a knapsack mister for foliar application. In some instances it was applied using larger trailer or tractor mounted spray equipment.

In most instances 2,4,5-T was usually applied using the basal bark application technique. The herbicide was mixed with diesel and applied in a band around the trunk of trees being treated. In the 1970s, 20 litre knapsack sprays similar to firefighting knapsacks were used. By the 1980s, these had been replaced by smaller pump-up spray units similar to those used in home gardens.38

http://www.parliament.wa.gov.au/parliament%5Ccommit.nsf/%28Report+Lookup+by+Com+ID%29/CD08CE85AE2369D148257831003E960B/$file/ep.apb.041020.rpf.010.xx.a.pdf