Lac, a natural resinous substance having profound economic importance, is a secretion of Lac insect Kerria chinensis (Hemiptera: Kerridae). Lac is widely cultivated in different states of India on several host plants. North eastern region particularly Assam is one of the biodiversity hotspots with approximately 4000 species of plants but exploitation of these natural flora for commercial production of lac is very limited. This present study aims to explore the suitability of eight native plants viz., Flemingia semialata Roxb., Flemingia strobilifera (L.) W.T.Aiton, Indigofera teysmannii L., Ficus religiosa L., Zizyphus mauritiana Lam., Litchi chinensis Sonn., Hibiscus rosa-sinensis L. and Cajanus cajan L. as hosts of lac insect. Both field and laboratory experiments were carried out to study the productivity linked parameters and life cycle of the lac insect on the respective plants. Biochemical constituents of the host plants were also studied to find out their role in resin production. Among the eight native plants, F. semialata showed highest productivity of broodlac (0.30 kg) and longest life cycle duration (164.5 ± 2.5 days) in winter lac cultivation. Phenol content of the bark registered a significant positive correlation with the production of lac whereas both alkaloid and flavonoid were found non- significant with the production of lac.

紫胶，具有深刻的经济重要性自然树脂状物质，是紫胶虫的分泌紫胶羊草（半翅目：Kerridae）。Lac在印度的不同州广泛种植于几种寄主植物上。东北地区，特别是阿萨姆邦，是生物多样性热点地区之一，大约有4000种植物，但是将这些天然植物用于商业生产紫胶的开发非常有限。本研究旨在探索八种本地植物，即Flamingia semialata Roxb的适宜性。， Stebilibilifera（L.）WTAiton ，Indigofera teysmannii L. ，Ficus religiosa L. ，Zizyphus mauritiana Lam。荔枝桑恩 ，木槿罗莎和L. Cajanus cajan L.作为紫胶昆虫的寄主。进行了野外和实验室实验，研究了紫胶虫在各个植物上的生产力相关参数和生命周期。还研究了宿主植物的生化成分，以了解它们在树脂生产中的作用。在这八个原生植物，F. semialata在冬季种植紫胶显示broodlac（0.30公斤），生命周期最长的持续时间（164.5±2.5天）的最高效率。树皮中的苯酚含量与lac的产生呈显着正相关，而生物碱和类黄酮均与lac的产生无关。