The use of African Scurf Pea (Psoralea corylifolia), commonly known as Babchi, for treating scabies is primarily based on traditional medicine practices. In Ayurvedic, Unani, and some African traditional medicines, the seeds and oil of Psoralea corylifolia have been used topically to manage various skin conditions, including scabies, leprosy, and vitiligo. The primary rationale is the plant's purported antimicrobial and antiparasitic properties as described in traditional texts, and its historical use as a skin remedy.

However, there is little to no direct scientific evidence supporting its efficacy specifically against Sarcoptes scabiei, the mite responsible for scabies. Most modern research on Babchi has focused on its use in vitiligo and its broad-spectrum antimicrobial effects, but clinical trials or in vitro studies specifically addressing scabies are lacking. Some phytochemical studies indicate that Babchi contains compounds such as psoralen and bakuchiol, which have antibacterial and antifungal properties, but their effect on scabies mites has not been rigorously evaluated.

In summary, the use of African Scurf Pea for scabies is grounded in traditional practice rather than robust scientific validation. Evidence supporting its effectiveness for this specific condition is minimal and largely anecdotal.