Li, S.J., Hou, K., Liu, F.S., & Zhao, H. 1997 Natural distribution, drought-resistant nature and moisture physiology of fine host trees for lac insects.. Forest Research 10: 519-524.

Notes: Study of natural distribution and biological characters of fine host trees of lac insects reveals six drought-resistant species of trees: Albizzia kalkora, Dalbergia obtusifolia D. szemaoensis, Pueraria wallichii, Moghania macrophylla and Ficus racemosa. Moisture physiology indexes such as strength of transpiration, water potential, and water saturation deficit relate to comprehensive climate factors such as atmospheric temperature, intensity of illumination, relative humidity of atmosphere, and wind velocity. Strength of transpiration increases with the rise of temperature, intensity of illumination and wind speed or decreases with the rise of relative humidity of atmosphere. Variations of water potential are contrary to the change of strength of transpiration. The water potentials drop when strength of transpiration rises and capability to absorb water passively increases. Ability of drought resistance also rises. The larger the deficit of critical saturation, the smaller the water requirement and the stronger the drought hardiness. Drought resistance of the 6 species of trees in order from stronger to weaker is: A. kalkora, D. obtusifolia, P. wallichii, D. szemaoensis, M. macrophylla and F. racemosa.