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茉莉花叶斑病的防治方法

美琪爱拍照
2017-05-24
#茉莉 叶斑病的症状:为害叶片,初期产生浅褐色斑点,后向四周扩展,病部变薄,病斑不规则,呈黄褐色,边缘有褐色细线,与健部分界明显。后期病斑上生黑色小粒点,严重时造成穿孔或落叶。

  
茉莉叶斑病的发病特点:该病属于真菌性病害,病菌在病部或病落叶上越冬,孢子借风雨传播。5至6月开始发病延续到8至9月。夏日雨多,湿气滞留易发病。

茉莉#叶斑病 的防治方法:
1、发现病叶及时摘除,集中烧毁。

2、增施磷钾肥,促使植株生长健壮,增强抗病力。

3、发病之前喷1次27%铜高尚悬浮剂或12%绿乳铜乳油600倍液、1比1比160倍式波尔多液,发病后喷洒50%甲基托布津可湿性粉剂600倍液,或40%百菌清悬浮剂500倍液、25%苯菌灵·环已锌乳油800倍液、50%甲基硫菌灵·硫磺悬浮剂800倍液、50%利得可湿性粉剂1000倍液。隔7至10天一次,连续防治2至3次。
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