Millipedes rarely initiate damage in garden plants.
Any damage tends to be initiated by other garden creatures.
They sometimes graze the fruits of strawberry plants, as well as potato tubers and bulbs.
It's advised to keep strawberries off the ground using a material such as hay or straw.
Likewise, by taking the necessary precautions to lessen damage inflicted by slugs and snails, millipede activity will decrease too.
Animals such as birds, hedgehogs, frogs and ground beetles prey upon millipedes. Attract these creatures to the garden by incorporating wild patches and making gaps in your fences. This way, you create corridors for beneficial wildlife to pass through and do their thing!