If you are on a Working Holiday Visa, you are surely looking at applying for a second one.

In order to do so you must complete 3 months, or 88 days of specified work in regional Australia.

This app will help you to find out where to go and when for your fruit picking which counts as 'specified work' in Australia.

As per the following:
"There are many different industries you can work in to become eligible for a second year visa including agriculture in such industries as harvesting, cultivation, processing as well as others such as forestry, fishing and pearling, mining and some sectors of the construction industry"

What areas count as regional Australia?
You must complete your seasonal work in one of the specified areas in Australia, fortunately, you can complete your specified work in any state. Every state has its own specified postcodes which are eligible as regional Australia, some states such as South Australia and Tasmania count as regional Australia in their entirety, while others such as Western Australia simply require you to avoid the more populated areas like Perth.