常見(jiàn)農(nóng)藥田間藥效試驗(yàn)總結(jié)教學(xué)課件

常見(jiàn)殺蟲(chóng)劑的田間藥效試驗(yàn)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL一、殺蟲(chóng)劑田間藥效試驗(yàn)(一)、水稻害蟲(chóng)1、水稻螟蟲(chóng)二化螟:Chilosuppressall卵塊主要產(chǎn)在離水面6cm以上的葉鞘上,初孵幼蟲(chóng)先侵入葉鞘集中為害,造成“枯鞘”,二齡以后蛀入稻株內(nèi)為害,造成“枯心苗”、“死孕穗”。三化螟:7ryporyzaincertulas卵多產(chǎn)于葉片上,其次是葉鞘上,造成“枯心苗”、“死孕穗”Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)水稻螟蟲(chóng)化螟Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)1、水稻螟蟲(chóng)施藥時(shí)期:2齡幼蟲(chóng)高峰之前施藥調(diào)查時(shí)間:一般殺蟲(chóng)效果1-3天檢查,采用“Z”字形選擇螟害株50株,剝查被害株內(nèi)的活蟲(chóng)數(shù)和死蟲(chóng)數(shù)。保證每小區(qū)剝查總蟲(chóng)數(shù)大于30頭。Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)2、稻縱卷葉螟Cnaphalocrocismedina/s初孵幼蟲(chóng)取食心葉,出現(xiàn)針頭狀白色小點(diǎn),縱卷葉成筒狀蟲(chóng)苞,幼蟲(chóng)在內(nèi)啃食葉肉,留下表皮呈白色條斑。稻縱卷葉螟狀Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)2、稻縱卷葉螟Cnaphalocrocismedina/is每小區(qū)采用五點(diǎn)取樣,調(diào)查每百叢蟲(chóng)苞數(shù),并剝查存活蟲(chóng)數(shù),計(jì)算蟲(chóng)口減退率及防治效果Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL()、水稻害蟲(chóng)3、稻飛虱類褐飛虱Nilaparvatalugens、白背飛虱sygate∥afurcifera、灰飛虱Laodelphaxstriatella主要以成蟲(chóng)和若蟲(chóng)群集稻株莖基部刺吸汁液,使葉片枯黃。盤成蟲(chóng)成蟲(chóng)產(chǎn)在葉勒的里織內(nèi)的卵若蟲(chóng)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL()、水稻害蟲(chóng)3、稻飛虱類每小區(qū)采用平行跳躍線法隨機(jī)調(diào)査10-20點(diǎn),每點(diǎn)拍打2從,將稻虱拍落在白瓷盆內(nèi),計(jì)算盆內(nèi)稻虱的活蟲(chóng)數(shù)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)4、稻葉蟬類黑尾葉蟬,二點(diǎn)黑尾葉蟬,白翅葉蟬若蟲(chóng)多群集在稻叢基部,成蟲(chóng)則在稻莖及葉片上為害,被害稻苗葉尖枯黃,嚴(yán)重時(shí)全株枯死。Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL(一)、水稻害蟲(chóng)4、稻葉蟬類施藥期:若蟲(chóng)23齡調(diào)査方法:每小區(qū)采用平行跳躍線法隨機(jī)調(diào)查10-20點(diǎn),每點(diǎn)拍打2叢,將葉蟬拍落在白瓷盆內(nèi),計(jì)算盆內(nèi)葉蟬的活蟲(chóng)數(shù)。Valadononry.chAsposeslidesforN