We’re quite fortunate in North Queensland; there are not a large amount of pests or diseases that affect...

We’re quite fortunate in North Queensland; there are not a large amount of pests or diseases that affect our lawns.
The most prevalent issue is lawn army worm. The symptoms are dying patches of lawn, red wasps with long stingers hovering over the lawn, Ibis and Plovers pecking at the lawn, and/or a build-up of yellow cocoons under the eaves of your home. To know for sure you can lay a wet hessian bag on the grass overnight – when you remove the bag early the next morning any army worms should be visible. Or you can simply flood a small section of the lawn and any grubs should float to the surface.

http://hardenparklawns.com.au/north-queensland-lawns-disease-and-pests/