The genus Palmaceae, the genus of the genus, is known as the yellow coconut, the phoenix bamboo, and the origin of Madagascar, Africa. The leaf blight of S. sylvestris severely affects the growth of S. cerevisiae. It is a common disease caused by fungal infection. The lighter leaves the leaves dry, and the heavy ones cause the whole plant to die. Pesticide control should be carried out in time. Xiao Bian now introduces its symptoms, pathogenesis and prevention methods as follows:
First, the pathogenic bacteria first infect the tip of the leaf and the edge of the leaf. At the beginning of the disease, there are brown spots or streaked plaques in the affected area. The mid-point spots or plaques gradually expand and connect with each other, and the leaves in the later stage appear gray and dry.
Second, the pathogenesis of the disease pathogens overwinter on the diseased plants or soil, the conidia spread by wind, rain, spray watering, the bacteria invade from the plant wounds. High temperature, high humidity and tight ventilation are prone to this disease.
Third, prevention and treatment methods to strengthen the disease inspection, do not introduce diseased plants; strengthen ventilation, avoid rain and spray during the onset; timely cut off the affected branches and leaves, prevent further infiltration, after the pruning, apply Dakening ointment for treatment; if there is disease It can be sprayed with 70% methyl thiophanate 800 solution or 75% chlorothalonil 1000 times solution, sprayed once every 7 to 10 days, and continuously sprayed 3 to 4 times, which can effectively control the disease.
If the environment is dry and poorly ventilated, red spiders and scale insects are prone to occur. The pesticide network is recommended to be sprayed with 800 times of omethoate regularly.
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