Can you use Yates 38mL Grub Kill & Protect for Lawns Concentrate in your, Rose garden bed,if not what can I do

Unfortunately, the product is only registered for lawn not for garden beds. The best advice that I can provide to get on top of the curl grub in these areas is to give the ground a really deep water. This will draw the grubs up to near the surface of the soil allowing you to access them more readily. This is great to do with kids as it is like a hunt for grubs. Once you have caught the grubs you can feed them to local magpies or dispose of them.