The results show that 20 % metarhizium anisopliae oil has certain effects on controlling caged locusts , although it has no ideal total result on controlling the high definition locusts in short - term 结果表明： 20 %杀蝗绿僵菌油剂对笼罩内蝗虫的防治具有一定的控制作用，但短期内对高密度蝗虫种群数量的总体控制效果不理想。
The study would offer the science evidence to prevention and cure against grasshoppers and the protection of biodiversity , and also the basic information to continuant development of local biodiversity 本研究丰富了汉中地区物种多样性的内容，探讨了汉中地区蝗总科昆虫的物种多样性和生态系统多样性特点和分布规律，为蝗虫的防治和生物多样性保护提供科学依据，为本地区生物多样性的可持续发展提供基础资料。
Hwtx - v can reversibly paralyze locusts and cockroaches for several hours with an ed50 value as 16 + 5ug / g to locusts , and larger dose of the toxin can cause death . the neurotoxic symptoms induced by intra - abdominal injection of huwentoxin - v were paralysis , immobilization and last gradually recovery Hwtx -通过腹腔注射，能使蝗虫和蜚蠊产生可逆的剂量依赖性的麻痹作用，麻痹时间长达十多个小时，在高剂量( 100 g g )时可使蝗虫和蜚蠊致死，对蝗虫的ed _ ( 50 ) = 16 5 g g 。
How the locusts made the trans - atlantic flight is unclear , since the insects do n ' t have enough fat to power a trip lasting several days . " one unlikely hypothesis is that while the locusts were flying across , as their brethren died and landed in the ocean , they formed huge floating mats of dead locusts , " says lovejoy 众多蝗虫的尸体形成了在水上漂浮的垫子。而其它的蝗虫则能享受前者为它们带来的便利，在这些垫子上休息并以前者的尸体为食。休息好之后，它们又再次起飞继续飞行。 ”
So far the chemical controls are still the major measures taken in locust abatement programs in china . in spite of the effectiveness and convenience , the frequent use of insecticides both in quantity and variety has caused a series of problems like locust resistance development , increased control difficulty and rising cost 我国目前控制蝗虫危害的手段主要是采用化学药剂来降低虫口密度，化学防治虽然具有快速、高效、使用灵活等优点，但是随着农药品种及数量的增加和无限制地使用农药，会导致引起蝗虫的抗药性、农药的效能降低、农药生产成本增加等一系列问题。
The author investigated the community of grasshoppers in changbai mountain area during the period of july to september 2001 , complementally collected specimen and systematically collected and measured environmental factors from july to october in the following year , and consulted to specimen collected by fengling zhang and yanlong - yang in 1979 , 1980 and 1981 . by analyzing and classifying the data of five years , the author analyzed the community construction and ecological adaptability of the grasshoppers in the area . the main aspects dealing with the grasshoppers are as follows : ( 1 ) the community construction and faunal geographical elements ; ( 2 ) characteristics of their ecological distribution ; ( 3 ) vertical distribution of grasshoppers in the northern slop ; ( 4 ) the relationship between environmental factors and differences in shape of grasshoppers in different vertical belt of northern slop , etc . in terms of faunal geographical elements of grasshopper communities , 48 species of grasshopper were recorded , belonging to 31 genera , 7 families 本文作者于2001年7 9月间系统地调查了长白山地区的蝗虫，并于2002年的7月到10月间对标本进行了补充采集，并对环境因子数据进行了系统的测量和收集，同时参考张凤岭、杨彦龙先生1979 、 1980和1981三年采集的标本，通过对标本的鉴定和整理，采用五年的野外工作数据，对长白山地区蝗虫群落结构及生态适应特性进行了研究，主要研究内容包括：蝗虫的群落结构及区系地理成分；蝗虫生态分布特点；保护区北坡蝗虫垂直分布及不同垂直带内蝗虫的形态差异和环境因子之间的关系等方面内容。
After 3 years " working systematically , the student found one new species and three new records to hanzhong ; after investigating the biodiversities in different zones , months and ecosystem , some rules of species emergence and distributing characteristics were found , and at the same time the study on ecosystem diversity of acridoidea was the first in hanzhong ; countermeasures were put forward against the major pest - rice grasshoppers in local paddy field ; the applicability of biodiversity indexes were discussed primarily 经过近3年的系统研究，发现蝗虫1新种，汉中地区蝗总科昆虫新记录3种；通过不同地带、不同月份、不同生态系统生物多样性研究，发现了汉中地区蝗虫的发生规律、分布特点，填补了汉中地区蝗总科生态多样性研究的空白；对汉中地区水田生态系统中农作物主要害虫?稻蝗的防治提出了对策；对生物多样性指标的适用性进行了初步的探讨。
In the part of vertical distribution , the author make an initial explore of its vertical distribution regulations in the 4 following aspects : the comparison of grasshopper community in different vertical belt ; the definition and comparison of dominant species in every vertical belt ; analysis of similarity and the definition of multiple belt and single belt species , in the author ' s opinion , vertical distribution of grasshopper in changbai mountain region do not have integrated regularity , its richness is related to the complexity of vegetation composition , and affected by other environmental factors 关于垂直分布的研究，作者主要从不同垂直带内蝗虫群落的比较、各垂直带中优势种的确定和比较、相似性的分析和多带种及单带种的确定4个方面，对其垂直分布规律进行了初步探讨。作者认为，长白山地区蝗虫的垂直分布不具有整体的规律性，蝗虫种类的丰富度直接与植被组成的复杂程度相关，同时受生境中其它环境因子的影响。
Among those species , the palaearctic species with 41 species recorded are dominant , accounting for 85 . 42 % of the total species number of the region ; the endemic species with 2 species , accounting for a comparable small part ; the widly - distributed accounting for a relatively larger proportion , with 5 species and 10 . 42 % of the total . the characteristics of the faunal construction not only reflect the adaptability of grasshopper himself to the circumstance around him but also are the appraisals and proofs of transportation about historical natural circumstances . this paper mainly aims at a - structure 从蝗虫的区系地理成分来看，长白山地区共有48种蝗虫构成了蝗虫群落，它们隶属于7科， 31属；其中古北种占有绝对优势地位，计41种，占该区蝗虫总数的85 . 42 ；东洋种所占比例较小，只有2种，占总数的4 . 17 ；广布种5种，占该区蝗虫总数的10 . 42 ；特有种所占比例较小，只有5种，占该区蝗虫总数的10 . 42 。
