What if the rubber tree has black spots?

1. Anthrax

It is prone to anthrax, which generally occurs on both sides of the leaves and begins with brown-green dots on the leaves. When the symptoms deepen, it will become round or oval spots, the edge of this spot is dark brown, the middle color is lighter, there will be small black spots, if the disease is more serious, the leaves will wither and fall easily.

Generally speaking, the disease occurs from June to August because it rains more and the air is humid in one season. If you don't know if this is the reason, you can identify it by observing the foliage. If you really can't identify it, you can wet it and squeeze it. If there is a pink colloid, it means that the black spot is caused by this kind of cause.

Once it is confirmed that this is the reason, then we can first cut off the diseased leaves and then destroy them. After that, we should pay attention to not allowing water to accumulate in the soil and good ventilation. In the early days, we can use liquids to treat the disease, such as carbon jaundice Fumi or Dyson Zinc.

2. Grey spot

Grey spot is also a big cause of black spots, which usually occurs on leaves. At the beginning, it is a gray spot, and then it becomes irregular. The edge of this spot is black and brown, and the inside is usually gray and white. When the disease is more serious, the leaves will begin to dry up, and some black powdery substances will appear.

Generally speaking, the main reason for this disease is that it has wounds, so we need to reduce the damage to it. To deal with it, just cut off the diseased leaves and use substances such as carbendazim to treat them.