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一、病害及防治1.霜霉病。多发生于高温高湿天气,发病时叶片表面呈灰白色有霜霉层。防治方法:保持通风透光,土壤保持较低湿度;清除病叶,集中烧毁;在7~8月连续阴雨天气可用“波尔多液”喷雾,每隔15天喷1次,连续用药2~3次;在发病初期用58%“甲霜灵·锰锌”500~600倍液或75%“百菌清”可湿性粉剂600~800倍液兑水喷雾。2.锈病。在灯盏花各个生育期均可发生,以夏季发病较重。发病初期仅在叶片背面出现失绿,后出现少量
First, the disease and prevention 1. Downy mildew. Occurred in hot and humid weather, when the incidence of gray surface creamy moldy layer. Prevention and treatment methods: to maintain ventilation and light, the soil to maintain a low humidity; remove the diseased leaves, concentrated burned; in July and August continuous rainy weather available “Bordeaux mixture” spray, spraying every 15 days, continuous medication 2 ~ 3 times; early in the onset of 58% “metalaxyl manganese zinc ” 500 ~ 600 times or 75% “Chlorothalonil ” wettable powder 600 to 800 times watered spray. Rust Erigeron breed can occur in all periods, the incidence of heavier in summer. The incidence of chlorosis in the back of the leaves appeared only after the onset of a small amount