抽穗遲的晚稻注意補治稻縱卷葉螟尾峰 weihaiwandaodedisidaidaozongjuanyemingzhuyaoweibendichongyuan,danyeyoubufenshoutaifengdaocaoyingxiangyoubeiqianhuijiangluozainanfangdechongyuan,yinerfashengwangwangyouduogefengci。qianduan“泰利”等deng台tai風feng頻pin繁fan發fa生sheng,這zhe是shi多duo年nian來lai比bi較jiao少shao見jian的de,對dui於yu稻dao縱zong卷juan葉ye螟ming的de成cheng蟲chong由you東dong北bei方fang向xiang中zhong稻dao區qu回hui遷qian並bing降jiang落luo到dao長chang江jiang中zhong下xia遊you地di區qu非fei常chang有you利li。預yu計ji今jin年nian第di四si代dai稻dao縱zong卷juan葉ye螟ming發fa生sheng會hui比bi較jiao嚴yan重zhong,而er且qie尾wei峰feng會hui比bi較jiao明ming顯xian。因yin此ci,要yao在zai9月上旬的保穗戰役中“重拳”出擊稻縱卷葉螟的基礎上,注意對9月中旬前後抽穗遲的晚稻可能出現稻縱卷葉螟尾峰進行補治,防止“尾峰”對dui這zhe些xie抽chou穗sui遲chi的de晚wan稻dao造zao成cheng嚴yan重zhong危wei害hai。對dui於yu尾wei峰feng幼you蟲chong危wei害hai往wang往wang不bu為wei農nong戶hu所suo重zhong視shi,因yin而er易yi對dui遲chi抽chou穗sui的de晚wan稻dao造zao成cheng嚴yan重zhong的de損sun失shi。有you鑒jian於yu此ci,此ci役yi後hou對dui於yu抽chou穗sui遲chi的de晚wan稻dao,還hai要yao根gen據ju“尾峰”發生情況,及時補治,防止稻縱卷葉螟幼蟲卷土重來。防治指標為每100蔸有幼蟲30~40頭、卷葉率7%,防治農藥為銳勁特(適早用藥)huosanzuolindeng。zhelixuyaozhichudeshi,suiranyibanwandaoqisuihou,jianyebuzaiyounen,nanyiweidaozongjuanyemingyouchongjuanyequshi,danduiyutanqingwanshudeqiukuaiqisuihoujianyenaizhidaoerye,rengranbijiaoyounen,yineryeyizaoshoudaozongjuanyeming“尾峰”為害,要根據情況及時補治。
遲熟晚稻防二化螟翹尾 近jin年nian來lai早zao中zhong稻dao插cha花hua種zhong植zhi麵mian積ji大da,再zai加jia之zhi早zao稻dao田tian留liu樁zhuang免mian耕geng插cha晚wan稻dao技ji術shu的de普pu及ji推tui廣guang,二er化hua螟ming不bu僅jin發fa生sheng加jia重zhong,而er且qie發fa生sheng世shi代dai重zhong疊die,進jin度du極ji不bu一yi致zhi,以yi至zhi於yu晚wan稻dao齊qi穗sui後hou到dao乳ru熟shu期qi還hai可ke能neng遭zao受shou二er化hua螟ming“尾峰”嚴重危害,危害部位呈上升趨勢,即由基部轉為危害幼嫩的穗軸,造成大量的秕粒。鑒於第4代dai二er化hua螟ming尾wei峰feng危wei害hai對dui象xiang主zhu要yao是shi遲chi熟shu雜za交jiao晚wan稻dao,因yin此ci,對dui於yu遲chi熟shu雜za交jiao晚wan稻dao二er化hua螟ming發fa生sheng嚴yan重zhong的de丘qiu塊kuai,在zai齊qi穗sui後hou到dao乳ru熟shu期qi要yao根gen據ju情qing況kuang補bu治zhi二er化hua螟ming“尾峰”。可結合稻飛虱防治,使用銳幼特等對口農藥防治。
晚稻後期防稻飛虱卷土重來 weihaiwandaodedaofeishizhuyaozhongleiweihefeishi,hefeishiyeshiqianfeixinghaichong。zaiwandaozhonghouqi,chubendichongyuanwai,yeyoushoutaifengdaocaoyingxiangyoubeifangqianhuijiangluodaonanfangdechongyuan,yinerzaitongyidaineiwangwangyouduogefengci。jinnianshou“泰利”dengtaifengdeyingxiang,yujiwandaohouqihefeishifashenghuibijiaoyanzhong。youyuyoudongbeifangxianghuiqianlaidehefeishichengchongkeyizhijieweihaiwandao,yinershiyaohourengyoukenengchuxiandaofeishi“突增”現象,而農戶在8月中旬到9月上旬的病蟲防治戰役後往往大意,給第5代褐飛虱以可乘之機,因此,晚稻後期,要密切注意稻飛虱發生情況,按指標防治:當每百蔸有四齡、五齡若蟲300~500隻時就要列為防治對象田,用10%蚜虱淨(吡蟲啉、一遍淨、大功臣、康福多)2500~3500倍液防治。施藥後注意田間調查,發現“翹尾巴”要及時補治。
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