Robert from Ogilvie, Mn writes
Princep Liquid Herbicide is not labeled to be used around anything edible. We currently do not have a pre-emergent labeled to be used around raspberries. We recommend that you contact your local cooperative extension office and ask to speak to the master gardener on staff to receive more information on pre-emergent weed control around edible berries.
Answer last updated on: 03/17/2016