手機版
二、發病因素：病菌以卵孢子在土中營腐生生活的菌絲（孢子囊），qinranguamiaoyinqicudao。tianjiandezaiqinranzhuyaokaobingmiaoshangchanchubaozinangjiyoudongbaozi，jieguangaishuihuoyushuijianfudaotiejindimiandegenjinghuoguoshishangyinzhigengyanzhongdesunshi。bingjunshengchangshiyidiwen15～16℃，溫度高於30℃受到抑製；適宜發病地溫10℃，低溫對寄主生長不利，但病菌尚能活動，尤其是育苗期出現低溫、gaoshitiaojian，liyufabing。dangyoumiaoziyeyangfenjibenyongwan，xingenshangweizhashizhiqianshiganbingqi。zheshizhenyeweichouchu，tanshuihuahewubunengxunsuzengjia，kangbingliruo，yuyouyu、xuelianyintianhuohanliuqinxi，diwendi，guanghezuoyongruo，guamiaohuxizuoyongzengqiang，xiaohaojiada，zhiyoujingxibaoshenchang，xibaobibianbobingjunchengjiqinru。yinci，gaibingzhuyaozaiyoumiaochangchu1～2片真葉期發生，3片真葉後，發病較少。結果期陰雨連綿，果實易染病。
一、症狀：苗miao期qi露lu出chu土tu表biao的de胚pei莖jing基ji部bu或huo中zhong部bu呈cheng水shui浸jin狀zhuang，後hou變bian成cheng黃huang褐he色se幹gan枯ku縮suo為wei線xian狀zhuang，往wang往wang子zi葉ye尚shang未wei凋diao萎wei，幼you苗miao即ji突tu然ran猝cu倒dao，致zhi幼you苗miao貼tie伏fu地di麵mian，有you時shi瓜gua苗miao出chu土tu胚pei軸zhou和he子zi葉ye已yi普pu遍bian腐fu爛lan，變bian褐he枯ku死si。濕度大時，病株附近長出白色棉絮狀菌絲。該菌侵染果實引致綿腐病。初現水漬狀斑點，後迅速擴大呈黃褐色水漬狀大病斑，與健部分界明顯，最後整個果實腐爛，且在病瓜外麵長出一層白色茂密棉絮狀菌絲。果實發病多始於臍部，也有的從傷口侵入在其附近開始腐爛。
