Come forward new formula to count mortality of lac insect.
提出了新的紫胶虫死亡率计算公式。
A resinous secretion of the lac insect deposited on trees and used in making shellac.
紫胶，虫胶由紫胶虫分泌的沉积于树上的树脂分泌物，用于制造虫胶清漆。
The characteristics of lac insect foraging behavior and its preference to host branch in foraging were studied.
研究了紫胶蚧觅食行为特点和紫胶蚧觅食时对寄主植物枝条的选择行为。
Butea gum is also called shellac, insect lac, etc.
前言： “紫铆”又名紫矿，还有紫梗、 紫草茸、 虫胶等名。
This paper deals with climatic conditions in original lac-producing areas and lac insect introduction and cultivation in new places.
本文分析了我国紫胶主产区的气候条件以及新产区紫胶虫引种驯化的研究概况。
This paper deals with climatic conditions in original lac-producing areas and lac insect introduction and cultivation in new places.
本文分析了我国紫胶主产区的气候条件以及新产区紫胶虫引种驯化的研究概况。
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