Here is some experience on how to care for green plants when cassia leaves develop leaf spot disease. Please see the detailed introduction below.
What to do when cassia leaf spots disease appears
Cassia trees develop leaf spot disease mainly due to insufficient fertilization during the care process, weakness of the whole plant, frost damage, or other injuries. In winter, we only need to do two steps. The first step is to remove the leaves, pulling off the diseased leaves from the plant to remove the focus of the disease.
If the cassia leaves are well-cared for, they tend to be relatively green or dark green, with no spots on the entire leaf. If you notice during the care process that the cassia tree has leaves with numerous spots, these spots start as light yellow and later turn brown or gray. In the later stage, there will be some small black dots around the spots.
You'll also notice that the spots are mainly concentrated in the middle and lower parts of the plant, and more severe and noticeable on older leaves than on new ones. This indicates that your cassia tree has been infected with leaf spot disease. When cassia tree leaves appear like this, it is leaf spot disease. For this kind of disease, we only need to do two steps in winter to completely solve the problem.
The reason why cassia trees develop leaf spot disease is mainly due to insufficient fertilization during the care process, weakness of the whole plant, frost damage, or other injuries. In winter, we only need to do two steps.
1. Remove leaves
The first step is to remove the leaves, pulling off the diseased leaves from the plant to remove the focus of the disease.
2. Apply medicine
The second part is to apply medicine. We first use mancozeb or tebuconazole diluted 1000 times and spray the entire cassia tree. This should be done approximately every seven days, for about two times. We also need to bury some medicine in the potting soil.
Burying medicine is to kill the bacteria in the potting soil so that the plant is less likely to be infected with leaf spot disease. For burial, we generally buy a small powder medicine, a granular fungicide, and slightly loosen the potting soil.
Then, we bury a spoonful of this small powder medicine around the plant. This is an absorbable and long-acting fungicide, suitable for indoor home use. Then, we fill the soil back and this can basically completely kill the bacteria, preventing the plant from being infected with leaf spot disease again.
3. Fertilize
After the spring, when the temperature is relatively suitable, we should appropriately fertilize the cassia tree to enhance its resistance. For fertilization, it is generally recommended to use organic fertilizers because they are rich in nutrients. Organic fertilizers can include well-fermented sheep manure or chicken manure, buried in the potting soil.
The above information provides a comprehensive introduction to what to do when cassia leaves develop leaf spot disease, hoping to bring some knowledge about green plants to green plant enthusiasts.