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茼蒿又叫蓬蒿、蒿菜,食用部位为嫩茎,营养丰富,纤维少,品质优,是蔬菜中的一个调剂品种。防治茼蒿病虫害,要以农业防治为主,合理施肥浇水,创造良好的生长环境,促进植株健康生长,降低病虫发生率,减少农药施用量,维护生态平衡。一、叶斑病1.发病症状该病为真菌性病害,主要危害叶片。被害叶片病斑呈圆形至椭圆形或不规则形,深褐色,微具轮纹,边缘紫褐色,外围具变色而未死的寄主组织,后期在
Chrysanthemum also known as basil, Artemisia vegetables, edible parts of the tender stem, nutrient-rich, less fiber, excellent quality, is a vegetable in a variety. Prevention and control of pests and diseases of Artemisia chinensis, to agricultural prevention and control, rational fertilization and watering to create a good environment for growth, promote healthy plant growth, reduce the incidence of pests and diseases, reduce the amount of pesticides applied and maintain ecological balance. First, leaf spot disease 1. Symptoms The disease is a fungal disease, the main hazard leaves. Victims leaf lesions were round to oval or irregular shape, dark brown, micro-wheel pattern, the edge of purple-brown, peripheral discoloration but not dead host tissues, the late