ON THE VEGETATION C0NDITI0N OF THE BEST GR0WING REGION OF LAC INSECT IN YUNNAN A Preliminary Study on Biology of Kerria lacca strain Rangeeni Study on the Host Trees Adjustment of Kerria lacca Insect Preference of Lac Insect to Host Branch in Foraging A Study on the Relationship between Amino Acid Content of Host Trees and Kerria lacca A STUDY ON THE BHALIA (MOGHANIA MACROPHYLLA) STUDY ON THE DEVELOPMENTAL THRESHOLD AND TOTAL OF EFFECTIVE TEMPERATURE OF THE LAC INSECT IN CHINA