⑴煙青蟲蛀果對軟腐病的發生與流行具有較大的決定作用。煙青蟲發生多的年份青椒軟腐病發病較重,反之發病輕,病害流行慢。
⑵yanqingchongduiruanfubingjuedingxiaoyingzailudizhongzhishibipengshizaipeixiangduixianzhu。jinguanpengshizaipeishipengneiliyuruanfubingzishengmanyandexiaoqihouhuanjingjiaoyixingcheng,danshidapengsheshidengduiyanqingchongjuyoujiaodadeguibizuoyong,suiranqingjiaobeiyanqingchongzhuruhoujiyifabing(不采用防蟲設施,如防蟲網等時,煙青蟲易進入棚內危害),danshipengneikeyirenweichuangzaochubuliyubinghailiuxingdexiaohuanjing,congershideyanqingchongduiruanfubingjuedingxiaoyingyousuojianruo。ludizhongzhiguochengzhong,yidanqingjiaoshouyanqingchongzhushiweihaihou,zaiziranqihoutiaojianshiyiruanfubingfashengshijijiuliuxingchengzai,nanyirenweigaibianfabingdaqihouhuanjing,ershidecishiyanqingchongduiruanfubingdejuedingxiaoyingxiangduixianzhu。qizonghezhilicuoshiruxia:
一、zhichongfangbingbiaobenjianzhi。jianyuqingjiaoruanfubingdefashengyuyanqingchongzhushiweihaicunzaijiaodadexiangguanxing,suoyizaishijishengchanzhongyaozuodaobiaobenjianzhi,bixuzhichongfangbingshuangguanqixia,qizhongyaoyizhichongweiguanjiandian,cainengqidaojiaohaodefangxiao。
二、防fang治zhi適shi期qi。在zai防fang治zhi過guo程cheng中zhong,要yao抓zhua住zhu兩liang個ge主zhu要yao時shi期qi,掌zhang握wo防fang治zhi指zhi標biao施shi藥yao。一yi是shi田tian間jian未wei有you蛀zhu果guo形xing成cheng時shi,在zai煙yan青qing蟲chong幼you蟲chong尚shang未wei蛀zhu入ru青qing椒jiao果guo實shi內nei部bu,即ji初chu孵fu幼you蟲chong至zhi2齡幼蟲期,突擊用藥,將煙青蟲“拒之果外”,可以大大減輕後繼軟腐病的滋生蔓延;二er是shi田tian間jian已yi經jing出chu現xian蛀zhu果guo後hou,蟲chong病bing兼jian治zhi,搶qiang在zai發fa病bing條tiao件jian沒mei有you形xing成cheng時shi用yong好hao殺sha菌jun劑ji,對dui於yu棚peng式shi栽zai培pei青qing椒jiao,最zui好hao配pei合he大da棚peng溫wen濕shi度du管guan理li措cuo施shi,改gai變bian適shi宜yi病bing害hai流liu行xing的de小xiao環huan境jing條tiao件jian來lai抑yi製zhi軟ruan腐fu病bing防fang效xiao更geng佳jia。
三、防治指標、藥劑與方法。當露地青椒單株煙青蟲見有卵塊或百株青椒有低齡(初孵至2齡期)幼蟲5頭,或當棚內查見卵塊或百株青椒有低齡(初孵至2齡期)幼蟲3頭時,即開始用藥防治煙青蟲:用20%毒氯乳油或4.5%高效氯氰菊酯液15毫升或52.25%農地樂15毫升,對水噴霧青椒植株嫩梢(主要心葉與嫩莖);當田間出現蛀果後,在上述藥劑中加入72%農用鏈黴素2000倍液混合使用,可對軟腐病起到較好防效。
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