There are varieties of Jainism that won’t pluck fruits (will only eat what has naturally fallen) and many mainstream varieties of Jainism that won’t eat any root vegetables (because digging them up would harm insects), or seeded vegetables (eating it harms the plants ability to reproduce).
Naturally fallen fruit has ground bugs enjoying them like slugs. If a slug is already enjoying the fruit, that would violate Jainism?
I’m not a Jain so take this with a grain of salt. Their philosophy of nonviolence believes in two sets of rules - one for ascetics and one for “householders”. The former renounce everything in service of nonviolence (they often wear masks to prevent breathing in any organisms, carry canes that they use to tap the ground when they walk, etc). The latter have more “reasonable” restrictions (but are still pure vegetarians, etc). So maybe for the former group?