I would not worry about treating any fungus is on the leaves of that plant. It is not prone to pest or disease problems and a few fungal spots here and there is of no real concern. This first year you probably don't need to worry about pruning that Arctic Kiwi. In the future in the new shoots back to a few buds as fruits are formed on second year wood and also on fruit spurs on older wood. Pruning is best done in the winter.
The following website provides information on pruning party Kiwi. Although it is from New York the information on how the plant grows in fruits is still useful.
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