Abstract: Ziziphus mauritiana Lam.is a chief host plant of the fine species of lac insects,Kerria lacca and K. sindica. During 1986～1988,a pilot experiment was carried out on transformation of the wild trees at Yuanmao Couty,Yunnan Province and satisfactory results were obtained as follows:From each stump 6～8 shoots can be regenerated. Thickness of the shoots is 2.0～3.0 cm in general, the thickest 4.68 cm in diameter;average length above 2.0m,the longest 3.55 m. These shoots can then be used to inoculate lac insects and give a large yield of raw lac of 3.0～6.0 kg per stump in the third year,the highest reaching 7.83 kg offering 40～80 yuan per stump.