PetraMax Castor Oil Mole & Vole Repellent (33.8 fl oz) Review

Correctly carries NO EPA registration number: castor oil products of this kind are exempt from federal registration under FIFRA section 25(b), the minimum-risk pesticide exemption. That is a different thing from a device — a 25(b) product IS a pesticide and does make a pest claim, but EPA has not reviewed or approved its label or its efficacy. So there is no label to read and no approved claim to check, which is exactly why our review of this category leans on extension trial evidence rather than on label text. Not individually confirmed for this brand; the 25(b) status is inferred from the castor-oil-only ingredient statement and should be checked against the pack if any label claim is ever made from this record. WSU FIELD TEST recorded 2026-08-20. The same WSU Extension newsletter field-tested a granular castor-oil-plus-Fullers-earth mole repellent through February, applied repeatedly to the active parts of a mole territory: "Throughout the test there was no change in activity. The mole kept returning to the application holes and plugging them up!" The mole did not avoid treated ground — it returned to the treated holes and closed them. Same limits apply (limited test, western species, 2007), but it is consistent with the customer ratings this product already carries.