Everyseveralyears,partsofAfricaarelikelytobecoveredbyadarkcloud,alivingcloudmadeofbillionsoflocuststhataretravellingacrossthecontinenteatingeverythingintheirpath.Plague of Locustshttp:/video.nationalgeographic.com/video/player/kids/animals-pets-kids/wild-detectives-kids/wd-ep9-locusts.html1Plagueoflocustsisaworldwidedisasterofbiologicalagriculture.Therearenearly100countriesorregionshavebeenattackedbyit.EspeciallyinAsiaandAfrica.2Thedroughtmakesthelocustslargelyreproduceinaveryshorttimebecausetheylikethewarmanddryweather.Adryenvironmentisgoodfortheirreproductionandgrowth.Thedrysoilwiththewatercontentbetween10percentand20percentisthebestconditionforthelocustsspawning.The first cause: Drought3The second cause: living habits1.Theyhavegregarious(合群的)habits.2.Theyhavestrongfertility.3.Theyarepolyphagous(eatingmanykindsofplants).4.Theirflyingabilitiesarestrong.5.Theireggsaredeepundertheground,andarehardtobedestroyed.4The third cause: the warm winterWiththeglobalwarming,especiallythetemperaturerisinginwinter,thesurvivalrateoflocustsbecomeshigh.Andthegrasslandsdegradationsupportstheavailableplacesfortheirspawning.thegrasslandsdegradationnearQilianMountains5Thepreventivemeasures1.ProtectingtheenvironmentThelocustsmusteggonthelandswiththecoverageofvegetationunder50percent.Ifwedowelltoprotectenvironment,andimprovetheweather,itwillpreventtheplague.62. Using the pharmaciesIt is suggested that the high efficient, low poisonous and low residual pesticides be used.73.Usingthenaturalenemies,Thelocustshavemorethan60naturalenemies,includingbirds,amphibians,reptilesandsoon.Insomeplaces,ducks,chickens,orspidersproduceagoodeffect.草原“牧鸡“-蝗虫的天敌8TheplagueoflocustsinChinaTheplagueoflocustshashappenedmanytimesinChina.TheregionsaremainlyintheprovincesofHebei,Henan,andShangdong,andalsoinShanxi,Shaanxi,Jiangsu,Anhui,Hubeiandsoon.9Manypeopleintheworldhavebeensufferingthroughthedisastrouslocustswarmssincethe1950s.Farmershavelostentirecrops.Butlocustsarenotthatbad.Atleastyouwillhaveplentyofhorsdoeurves.(开胃食品)10MaggotSilkwormchrysalis1112Definitely, worms and insects are delicious and nutritious. But do you have the courage to eat them. It is a challenge to you. Have a try!13留学（英美澳法加新六国）租房留学（英美澳法加新六国）租房www.6apt.com留学公寓在线隶属于同维思创网络科技（北京）有限责任公司。公司总部位于国家级大学科技园-中国人民大学文化科技园。www.6apt.com提供免费的海外学生公寓在线预订服务,不收取任何手续费或中介费。留学生直接向海外学生公寓支付费用,无任何中间环节。14留学（英美澳法加新六国）租房留学（英美澳法加新六国）租房最低价格：最低价格：不论在任何城市，www.6apt.com确保为您提供最佳价格。无需支付任何预定中介费用：无需支付任何预定中介费用：www.6apt.com提供免费的海外学生公寓在线预订服务，不收取任何费用。预订安全可靠：预订安全可靠：www.6apt.com学生公寓在线预订系统安全可靠，您的支付信息和个人信息都被加密。我们以最高的标准来保护您的隐私。公众媒体：公众媒体：企业新闻Facebook人人网Twitter新浪微博微信公众平台微信公众平台联系我们：联系我们：中国:400-078-3006,info6apt.com邮编:100872,北京市海淀区,中关村大街甲59号,人民大学文化大厦1206A室英国:+44(0)114-2753836,info6apt.com110ProvincialHouse,SollyStreet,Sheffield,S14BA,UK15留学（英美澳法加新六国）租房留学（英美澳法加新六国）租房公众媒体：公众媒体：企业新闻Facebook人人网Twitter新浪微博微信公众平台微信公众平台联系我们：联系我们：中国:400-078-3006,info6apt.com邮编:100872,北京市海淀区,中关村大街甲59号,人民大学文化大厦1206A室英国:+44(0)114-2753836,info6apt.com110ProvincialHouse,SollyStreet,Sheffield,S14BA,UK16