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红掌(火鹤花)叶斑病的防治方法

小九
2017-09-26
#红掌 也叫火鹤花,叶斑病其发病症状表现为:近叶缘处生褐色圆形小斑,边缘深褐色,中间浅褐色,常数斑融合成大斑。叶尖染病时,病部褪为草黄色至灰褐色,由叶尖向内扩展,病、健交界处呈突起的黄褐色线,波浪状,明显。下面一起跟小编来看看红掌叶斑病的防治方法。

病菌在病部或随病残体在土壤中越冬,第二年春天借风雨传播,新叶刚长出时遇低温多雨,花株生长弱时易发病。

防治方法:发现病叶及时剪去,少量病叶可用干净的剪子剪去病斑部分,外缘涂抹达克宁霜软膏。发病初期,用75%的百菌清可湿性粉剂600倍液,或50%的苯菌灵可湿性粉剂1000倍液,交替喷洒,每10天一次,连续2次至3次。

为防止夹杂有炭疽病斑,可用50%的甲基托布津可湿性粉剂800倍液,加75%的百菌清可湿性粉剂800倍液混合喷洒,防治效果较好。
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