Saving $42 - if bought separately.  
 
2x 1KG Sea-Hume Granules (value $56, will cover 10lrg trees)
100gm DiPel caterpillar control (value $25 makes 184ltrs spray)
200ml Naturally Neem insecticide (value $32, makes 100ltr spray)
1x Solar Trapz ($106 lasts basically, forever)
 
Autumn is the time when the eggs hatch, the larvae form, and they get hungry, so it is time to treat the ground and the tree in unison.