Submitter has sample EDRR Status: Local expert notified
Description of specimen
It's taking over our flower gardens
Commentary
Hello,
the only thing you can really do with Arum italicum is to dig it up. Note that it has many small bulbs, so throwing away an entire shovel full of dirt when you dig it is appropriate so you don't leave any bulbs behind. I agree that refraining from chemical use is a good idea in this situation because chemicals aren't known to be very effective anyway. Purchasing over the counter weed killers at a hardware store won't get you far with this plant. If you're unable to dig, at least make sure you cut off the seed heads once they're produced. Pulling the tops off of the plants (leaves and all) can help reduce the amount of photosynthesis that occurs.
Michael Ahr
May 9, 2023, 11:14 p.m.
Remedy
Italian arum can be difficult to eradicate once established. Make sure to wear gloves and long sleeves and pants when removing it, as its sap can cause skin irritation. Do not compost or put in your yard debris, as this can lead to spreading of tubers which can grow into new plants. Home control methods can include carefully digging out the tuber and any daughter tubers and disposing in the trash. Cutting and disposing of the berries in the trash can help prevent spreading to new sites. Herbicide trials are still inconclusive, please contact your local Soil and Water Conservation District if you are interested in chemical control.
the only thing you can really do with Arum italicum is to dig it up. Note that it has many small bulbs, so throwing away an entire shovel full of dirt when you dig it is appropriate so you don't leave any bulbs behind. I agree that refraining from chemical use is a good idea in this situation because chemicals aren't known to be very effective anyway. Purchasing over the counter weed killers at a hardware store won't get you far with this plant. If you're unable to dig, at least make sure you cut off the seed heads once they're produced. Pulling the tops off of the plants (leaves and all) can help reduce the amount of photosynthesis that occurs.
Michael Ahr
May 9, 2023, 11:14 p.m.