《植物病虫害绿色防控技术》课件——一、水稻螟虫绿色防控（双语）.pptxVIP

;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;三化螟分布于亚洲热带至温带南部，在我国分布于北纬38°以南地区，特别是沿江、沿海平原地区受害严重。其食性单一，仅为害水稻和野生稻。

YellowriceborerisdistributedfromthetropicstothesouthofthetemperatezoneinAsia,andinareassouthof38°NinChina,especiallyintheriversideandcoastalplains.Ithasasinglefeedinghabitandonlydamagesriceandwildrice.

二化螟在国内分布比较广泛，其食性为多食性，主要寄主有水稻、小麦、玉米、高粱、茭白等。

RicestemboreriswidelydistributedinChina,anditispolyphagous.Itsmainhostsincluderice,wheat,corn,sorghum,andwaterbamboo.

大螟在我国尤以长江流域及附近稻区发生较多。大螟食性为多食性，其寄主除与二化螟近似外，还可为害棉花。

PinkriceborerismorecommoninChina,especiallyintheYangtzeRiverbasinandnearbyriceregions.Itispolyphagous,anditshostissimilartothatofricestemborer,andcanalsodamagecotton.

;水稻螟虫皆以幼虫蛀食水稻茎杆，在水稻苗期、分蘖期呈现枯心苗，孕穗、抽穗期造成枯孕穗和白穗，灌浆、乳熟期造成虫伤株，使秕粒增多，易风折倒伏。二化螟、大螟还可在叶鞘内蛀食，形成枯鞘。

Riceborerlarvaeeatricestems,presentingwitheredseedlingsintheseedlingstageandtilleringstageofrice,causingwitheredbootsandwhiteearsinthebootingandheadingstages,andcausingdamagetoplantsduringthefillingandmilk-ripeningstages,increasingthenumberofabortivegrainsandmakingthempronetowind-breakageandlodging.Ricestemborerandpinkriceborercanalsoboreandfeedintheleafsheathtoformwitheredsheaths.

;枯鞘

Witheredsheath

;三种稻螟虫形态特征Morphologicalcharacteristicsofthreericeborers;三化螟成虫

Imagoofyellowriceborer

;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;大螟成虫

Imagoofpinkriceborer

;卵

Egg

;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;二化螟卵块

Eggmassofricestembore;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;幼虫

Larva

;三化螟幼虫及其在稻桩内越冬状

Larvaeofyellowriceborerandtheiroverwinteringinricestubble

;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;二化螟幼虫

Larvaeofricestemborer

;一水稻螟虫绿色防控

I.GreenPreventionandControlofRiceBorer;蛹

Pupa