1·Economic threshold for this pest insect was estimated by measuring the increasement rate of population density.
并提出用害虫种群潜在密度确定卷叶螟经济阈值的方法。
2·Using system science methods to study the system control of pest insect population, has an obvious social significance and practical value.
以系统科学方法研究害虫种群系统的控制，具有明显的社会意义和实践意义。
3·These growing wild species express the characteristics of stress tolerance, resistance to disease and pest insect, high quality under the severe competition and selection of nature.
这些野生种在自然界的严酷竞争和自然选择条件下形成了许多优良特征特性，特别表现在抗逆性、抗病虫害、品质等方面。
4·The cane toad was introduced back in 1935 to control an insect pest that was destroying Australia's sugarcane plantations.
蔗蜍早在1935年就被引进，以控制一种破坏澳大利亚甘蔗种植园的害虫。
5·The scale insect Paracerostegia kunmingensis Tang et Xie is an important pest that harms the deconative plants Pittosporum tobira.
昆明虎耳草的介壳虫是一种害虫，危害了拟南芥海桐花。
6·Insect predators living in the mixed species plantations reduce pest damage.
并且生活在混合植被中的昆虫捕食者可以减轻害虫的危害。
7·Asiatic insect introduced accidentally into United States; pest on citrus and apple trees.
偶然引入美国的亚洲昆虫；对柑橘树和苹果树有害。
8·The result indicates that the chewing pest, piercing-sucking pest, predatory natural enemy and neutral insect are the dominance guilds in the insect community.
结果表明：咀嚼害虫、刺吸害虫、捕食性天敌以及中性昆虫是昆虫群落的优势功能团；
9·The system includes following subsystems as disease position diagnosis & harmless control, disease period diagnosis & harmless control, insect pest diagnosis & harmless control and so on.
系统主要包括病害部位诊断与无公害防治、病害时期诊断无公害防治、虫害诊断与无公害防治等子系统。
10·As long as the plantation simulate for forest structure and take use of the component of anti - insect in its habitat, we can solve the problem for pest disaster.
在人工林构建中，只有模拟天然林结构，从害虫原栖息地抗虫林分结构出发，才能从根本上解决猖獗成灾问题。