1. SymptomsWhen it is infected with anthrax, the damaged parts are mainly the leaves. In the early stage of the disease, some irregular brown spots will appear on its leaves. Then, as time goes by, these leaves will slowly turn grayish white, and many small black spots will appear on the spots. It not only affects the growth of the plant, but also greatly affects its appearance. 2. Disease patternThe pattern of this disease is usually that the mycelium stays on the diseased leaves over the winter, and then in the spring of the following year, they will continue to produce spores, and then, coupled with the transmission of wind and rain, the disease will be caused. This disease is usually more likely to occur in hot and humid weather. In severe cases, all the leaves of the plant will burn or fall off. 3. Prevention and control methods1. First of all, we must strengthen its management. You can apply more organic fertilizer to enhance its physique and improve its resistance. 2. Secondly, do not water the leaves. At the same time, when it rains a lot, you should appropriately reduce the humidity of the air. 3. Finally, when the disease is found, the diseased leaves can be cut off and burned in time. At the same time, some medicine can be sprayed on the plant, which can also have a good therapeutic effect. The spraying time is once every 10 days, and a total of 2 to 3 times will be enough. |
>>: Rhododendron diseases and prevention methods
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