Australian Pesticides Map

1960’s – 1980’s: Christmas Creek Station Spray Workers. Pesticides: 2,4-D, 2,4,5-T

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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 By the 1980s, these had been replaced by smaller pump-up spray units similar to those used in home gardens.38
 
https://www.parliament.wa.gov.au/parliament%5Ccommit.nsf/%28Report+Lookup+by+Com+ID%29/CD08CE85AE2369D148257831003E960B/$file/ep.apb.041020.rpf.010.xx.a.pdf