What’s the best product for rust in zoysia turf?

Unfortunately, as yet we don't have a product registered for rust in lawn. You may try the following cultural controls: 

- Mow the lawn regularly to keep the grass at a moderate height;

- Sanitise the mower to prevent spread of the fungal disease; 

- Remove any lawn clippings and dethatch if needed to improve air circulation around the roots; 

- Water early in the morning to allow any moisture to dry before night. 

- Feed the lawn with 'Yates Dynamic Lifter Liquid Concentrate' as a gentle fertiliser and soil improver. It's certified for use in organic gardens, and contains seaweed, blood&bone and fish meal to help developing new roots and restoring healthy growth. Click here for more info on this product: https://www.yates.com.au/product/garden-fertilisers/certified-organics/yates-dynamic-lifter-liquid