(1) specific cause: This is one of the most likely causes of blackening. This plant is susceptible to a disease called anthrax. After infection, the leaves of the plant will become more and more scorched as the situation worsens. In addition, the situation of falling leaves will become more and more serious.
(2) solution: if it's a disease, we must first collect these black leaves and burn them uniformly. In this way, if the source of infection is removed, the situation may be alleviated. Then, spray some medicine, maybe the plant will recover slowly.
(1) specific reasons: This is also a very common reason. Black leaves may appear in any plant when it is harmed by pests, so can this plant. After the hazards are aggravated step by step, the blackened parts will become larger and larger. In this way, water transport will be inhibited, and the leaves will eventually dry and fall.
(2) solution: in this case, the solution is similar to the first one. Treat the diseased leaves first, and then spray.
(1) specific reasons: as mentioned above, there are two situations. One is that there is too much water, which leads to the lack of oxygen in the roots, and then the leaves turn black. The second is the quality of water, which may also make the leaves black.
(2) solution: in the first case, the corresponding measure is naturally to reduce water volume, and then add ventilation. For the second, you can add some (FeSO4) solution to the water.
(1) specific reasons: there are also two situations, one is too much, the other is too high concentration.
(2) solution: according to the above two different situations, the disposable fertilizer should not be too much and the concentration should be low. In short, we can use "thin fertilizer and diligent application" to summarize
