云南省保山市玉米田害虫与天敌种群周年动态及对产量的影响
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关键词玉米；害虫；天敌；危害损失； 中图分类号S435.132文献标识码A 文章编号 0517-6611（2025）13-0125-10 doi：10.3969/j. issn. 0517-6611. 2025. 13. 024
开放科学（资源服务）标识码（OSID）：
Annual Dynamics of PestandNaturalEnemiesinCornFieldinBaosan Cityof YunnanProvinceand ItsEfectonthe Corn Yield ZHAO Guo-an，CHENXing-jan，XIEXian-biaoetal（Plant ProtectionandInspection Stationof Baoshan City，aoshan，Yuan 678000）
AbstractThespecisandpopulationdyamicsofpestsandaturaleemiesoncoplantsindiferentplantingseasonincofedswithand withouthemicalisecticidesplicationinaosanCityYuanProvincefroSeptemer1toSeptember22wereivestigatedthe yieldofcowasmeasuedTheresultssowedthat terewere13speciesofpests icludingSodopterafrugiperda，opalosiphummidison corn，the relative abundance of them were 18.51% ，25. 46% and 19.08% ，81. 13% ，25. 93% and 77.89% on autumn-winter season， spring-summersasonadsummerwinterseasoncoespectivelyecompositioadstructureofestsoncochangedfeteasion of S frugiperda and Paralipsa gularis （（Zeller）in Baoshan corn planting areas，Spodoptera frugiperda and P ·gularis have been the predominant species of pests on corn in Baoshan City. The density of S . frugiperda and R . maidis on corn in spring summer and autumn planting corn ranked as the autumn-winter planting season>summer-autumn season>spring-summer planting season.Among of them， P . gularis was found mainlyonthesummer-autunplantingco，butnonewasfoundonthesprig-summerandautumn-winterplantingco.Tenspecisofnatural enemieswerefoundincluding theladybug，arwig，piders，predatorywasps，Chrysopaperla，tikbgs，Metarhiziumrileyi，Beueria bassiana，ant， Blattaria，the main natural enemies on autumn-winter corn was earwig， M .rileyi and B . bassiana. The predominant species of naturalenemieswereearwig，predatorystinkbugs，spidersonspring-summercon，ladybug，earwigandpredatorystinkbugswerethepre dominantspeciesofnaturalenemiesonsummer-autuncos.Pestsareaniportantfactorafectingcoyield.Comparedwiththeyieldf comfieldscontroledbyhmicalpesticides，teieldsofautumn-wintercosprig-sumecondsumme-autucowihoutcotrol measures were 69. 28% ， 33.49% ，and 28.31% lower respectively than those of corn fields controlled by chemical measures.
KeyWordsCorn;Pest;Natural enemies;Yield loss;Baoshan，Yunnan
玉米是我国最重要的粮食作物之一[1]，是云南省播种面积第一、总产量第二的大田作物，在全省范围内均有种植[2]，也是云南省保山市种植面积和总产均第一的最重要粮食作物，据2017—2023年农业统计，其常年种植面积为11.83万 hm2 ，总产78.89万t。（剩余10962字）