Grasshoppers have a 5 stage cycle and it is important to identity where the hatchings are taking place and start your control program at this early stage.
Spraying the hatchings is ultimate in control and the grasshoppers tend to concentrate on deep white sand under or near Red gums or Black Butt
If trees have been damaged would recommend a water so the trees can push out new shoots.
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Happy new year and lets hope we get text book rainfall events this year!!!
Tree bags help protect the trees from grasshoppers but also helps with the protection from herbicide when implementing post planting weed control