It will be illegal to use Omethoate (Folimat) on bananas and any other food crops after December 1, 2018.
If you have any remaining stock, you should use it up by this date. Chemical resellers should contact their suppliers for advice about stock that hasn’t been sold.
After December 1, growers should dispose of unwanted product responsibly, via a licensed waste disposal contractor or facility, such as the industry run stewardship program for the disposal of pesticides, Chemclear. Phone 1800 008 182 or register online here.
For additional advice, contact your relevant state of territory authority who control and manage the use of chemicals in your state: https://apvma.gov.au/node/3190
For alternative controls, please refer the fact sheet on controlling bunch pests available on the ABGC website.