basil crisis

basil crisis

Hi i have some nice large basil plants growing in a planter that's about 8" deep. every single leaf of this poor plant is filled with holes and eaten around the edges! i'm not so seasoned a gardner as to know what to do! i haven't seen any bugs though my dad said he saw slugs in the vegetable patch (separate from the planter) what can I do? please help! Thanks!
my apartment

my apartment

Future Domestic

Future Domestic

ANOTHER unknown

ANOTHER unknown

Sunroot (Jerusalem artichoke)

Sunroot (Jerusalem artichoke)

Carrots have sprouted!

Carrots have sprouted!

Strange ‘tators

Strange ‘tators