花花only
黄瓜在进行生长的时候,会有一些病虫害的发生,尤其是炭疽病,因为通风排湿不及时导致感染,在感染之后会有3天的潜育期,在温度比较高,或者比较低的时候就会发生,对于叶片的危害极大,所以在发生炭疽病的时候,要及时的使用药物来进行治疗。黄瓜炭疽病发病原因黄瓜在进行生长的时候,会有一些病虫害的发生,尤其是炭疽病,因为通风排湿不及时导致感染,在感染之后会有3天的潜育期,在温度比较高,或者比较低的时候就会发生,对于叶片的危害极大。黄瓜炭疽病症状表现黄瓜在整个生育期都有可能发生炭疽病,然后危害叶片以及茎蔓,尤其是在中后期的时候,危害最为严重,在发病的时候叶片会有褐色的圆形病斑,而且在比较严重的时候会有黑色的小点出现,直至叶片脱落。黄瓜炭疽病治疗黄瓜在发生炭疽病的时候,会使用一些效果比较不错的药物来治疗,一般会使用%施保功可湿性粉剂,治疗效果是比较不错的。黄瓜在发生炭疽病的时候,如果在前期及时的进行治疗是可以恢复的,如果是在发病的后期的话就不会恢复。黄瓜炭疽病防治方法黄瓜在进行种植的时候要使用没有病虫害的品种,而且使用的土壤也要及时的消毒,在平时还要有良好的通风环境,这样就可以减少发病的几率,在发生炭疽病的时候,要及时的使用药剂进行治疗。
咣脚奔跑的釹孩
炭疽病发病原因是土壤内的病残体和种子带菌。下面我们了解一下黄瓜炭疽病防治方法。黄瓜炭疽病的症状表现在茎和叶柄上形成圆形病斑,初呈水浸状,淡黄色,后变成深褐色。叶片受害时,初期出现水浸状小斑点,后扩大成近圆形的病斑,红褐色,病斑边缘有明显的-圈黄晕,叶片上病斑多时,往往汇合成不规则形的大斑块。后期病斑上出现许多小黑点,潮湿时长出粉红色粘质物,干燥时病斑中部易破裂形成穿孔。瓜条发病时,表面形成圆形、淡绿色凹陷形病斑,上着生黑色小点,后期在病斑表面产生粉红色粘稠物。黄瓜炭疽病的防治方法(l)选用抗病、无病品种。(2)播前种子处理,用55摄氏度温水浸种l5分钟。也可用50%多菌灵可湿性粉剂500倍液浸种l5分钟,然后清水冲洗播种。(3)加强棚室管理,放风排湿,控温防病,-般上午温度控制在30摄氏度,下午和晚上适当放风。黄瓜炭疽病的药剂防治用45%百菌清烟剂熏烟,每亩次250克。粉尘剂,用5%百菌清粉尘剂或克霉灵粉尘剂,每亩l千克,进行喷雾。用50%甲基托布津可湿性粉剂700倍再加75%百菌清可湿性粉剂700倍液,或80%炭疽福美可湿性粉剂800倍液或65%代森锰锌可湿性粉剂500~600倍液,l0%世高水分散粒剂l500倍液进行喷雾防治,同时混施叶面肥,使叶生长恢复正常。
Romy莎莎mei
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