Prosopis juliflora, a native of South to Central America, was introduced in India (Rajasthan) to combat desertification of Thar during early 20th century. Presently, this species is a most vigorously spreading plant species in the arid zone covering neutral alkaline and saline soil and has invaded most part of the state. Although this species is a reported host plant of Kerria sindica no information about its utilization for production of lac was available.