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1.茎枯病症状:初期乳白针刺小斑点,中期病斑纺锤或菱形,病斑褐色渐加深,后期灰白稍凹陷,病斑密生小黑点,病枝干枯似火烧状。侵染途径:风雨、农事操作。发病条件:高温多雨、潮湿。危害部位:茎、枝。防治方法:清除病残体,地面消毒;科学施肥不偏氮,增施磷钾肥;在多雨季节采取雨前喷药保护,雨后治疗,用有效药剂如23%芦笋青二号可湿粉600倍、40%百可得可湿粉1000～1500倍、50%托布津可湿粉600倍、58%可杀得2000杀菌剂600倍、40%杀毒矾可湿粉500倍液喷淋或浇灌。2.褐斑病症状:初期紫褐小斑点,中期病斑卵圆或椭圆,边缘棕褐中央灰白,后期斑点淡灰色。侵染途径:气流、雨水。发病条件:高湿、高温。危害部位:分枝、拟叶。防治方法:适时翻耙土地,减少菌源;发病初期用50%多菌
1. Stem blight symptoms: early milky acupuncture small spots, medium-term lesion spindles or diamonds, dark spots gradually deepened, the latter slightly gray depression, lesion dense black spots, dry branches like burning like fire. Paths of infection: wind and rain, agricultural operations. Incidence conditions: high temperature rainy, wet. Hazardous parts: stems, branches. Prevention and treatment methods: remove the disabled, ground disinfection; scientific fertilization not partial nitrogen, increased phosphorus and potassium; in the rainy season to take spray protection before rain, rain treatment, with effective agents such as 23% asparagus green two WP 600 times , 40% 100% wettable powder 1000 to 1500 times, 50% Topaz wettable powder 600 times, 58% can kill 2000 fungicides 600 times, 40% anti-virus alum WP 500 times spray or watering. 2 brown spot symptoms: early purple brown spot small, mid-term oval or oval ellipse, the edge of the central gray brown, late spot light gray. Pathways of infection: air, rain. Incidence conditions: high humidity, high temperature. Hazardous parts: branches, to be leaf. Prevention and treatment methods: timely rake the land to reduce the source of bacteria; the initial incidence of more than 50% bacteria