蘆筍莖腐病主要危害幼筍。幼筍出土後即可能受侵害,幼莖出現水漬狀不定形病斑,繞莖擴展,致莖組織崩解、腐爛,終致幼筍枯死。發病輕的即使不枯死,其生勢大減,地上部莖葉衰弱,幼莖細弱,產量低。
二、病原及發病特點
lusunjingfubingyoubanzhijunyamendefumeishuqinransuozhi。bingjunyishiyizhongturangxijudezhenjun,yijunsitiheluanbaozisuibingcantiyiluozaituzhongcunhuoyuedong,bingzaituzhongyingfushengshenghuo,cunhuolijiaoqiang。yuedongdeluanbaoziyiniankezhijiemengfayaguanqinranzhibing,yekemengfachanshengbaozinang,yiyoudongbaozizuoweichuqinjiezhongtiqinranzhibing。guangaishui、雨(yu)水(shui)是(shi)病(bing)菌(jun)主(zhu)要(yao)傳(chuan)播(bo)途(tu)徑(jing),其(qi)次(ci)病(bing)菌(jun)可(ke)借(jie)助(zhu)施(shi)用(yong)土(tu)雜(za)肥(fei)傳(chuan)播(bo)。連(lian)綿(mian)陰(yin)雨(yu)多(duo)的(de)年(nian)份(fen)或(huo)季(ji)節(jie)有(you)利(li)於(yu)發(fa)病(bing)。低(di)窪(wa)潮(chao)濕(shi)地(di),土(tu)質(zhi)粘(zhan)重(zhong)地(di)多(duo)發(fa)病(bing)。品(pin)種(zhong)間(jian)抗(kang)病(bing)性(xing)情(qing)況(kuang)尚(shang)缺(que)調(tiao)查(zha)。
三、防治方法
1.在zai本ben病bing常chang發fa生sheng的de地di區qu注zhu意yi整zheng治zhi植zhi地di排pai灌guan係xi統tong,有you條tiao件jian可ke采cai用yong滴di灌guan,嚴yan防fang大da水shui浸jin灌guan,雨yu後hou及ji時shi清qing溝gou排pai漬zi降jiang濕shi。土tu質zhi粘zhan重zhong地di應ying摻chan沙sha或huo增zeng施shi有you機ji肥fei等deng逐zhu步bu改gai土tu,增zeng強qiang土tu壤rang通tong透tou性xing,提ti高gao根gen係xi活huo力li。低di窪wa潮chao濕shi地di采cai用yong高gao畦qi深shen溝gou栽zai培pei,並bing挖wa環huan田tian溝gou、十字溝等措施以降低地下水位。
2.幼筍抽生期加強噴藥保護。按無病早防、見病早治的要求,采取噴淋結合的辦法,噴淋30%氧氯化銅懸浮劑(600倍液)或可殺得懸浮劑(800倍液),或25%甲霜靈可濕粉(600~800倍液),或65.5%普力克水劑(600倍液),或64%殺毒礬可濕粉(500倍液),3~4次,隔5~1O天1次,前密後疏,交替施用,噴透淋足,對初發少量輕病株,還可采用幼莖塗藥漿(上述藥劑的50倍液),或混麵粉配成藥漿塗莖,或加灌藥的辦法控製病害蔓延。
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