1, infected with leaf spot
Melasma appears on the leaves of Fugui tree, which may be the cause of leaf spot caused by improper maintenance. During the maintenance period, if it is not properly maintained, it may infect the rich tree with bacteria, leading to the leaf spot of the rich tree. After the infected tree is infected, there will be problems in the leaves, which will lead to yellow spots of different sizes on the leaves, and then the spots will gradually expand, which may lead to yellowing and shedding of the leaves.
Solution: If the trees are infected with leaf spot, you can cut off the diseased leaves, strengthen ventilation, maintain air circulation, and spray carbendazim, chlorothalonil and thiophanate methyl on the leaves.
Second, the harm of red spider
There are chloasma on the leaves of the rich tree, or there may be red spiders, and pests will also suck the juice from the leaves, thus causing yellow-brown spots on the leaves.
Solution: If the number of red spiders is small, you can spray water or wipe it off with a wet cloth.
Extended data:
Maintenance of rich trees:
1, selection of basin soil
The root system of the rich tree is not developed, so you can't choose a pot with poor air permeability. It is easy to accumulate water if it is too deep. Because the watering problem is easy to cause root rot, we can use the method of covering a large pot with a small pot to raise the rich and precious trees, which not only solves the problem of beauty, but also solves the problem of water accumulation. Rich trees generally use loose garden soil or peat soil, humus soil and coarse sand, and add a small amount of compound fertilizer or chicken manure as base fertilizer and culture soil.
2. Water and fertilizer management
Watering is an important link in the maintenance and management of rich trees. Less water, slow growth of branches and leaves; Too much water may lead to the death of rotten roots; Moderate water, thick branches and leaves. Water should adhere to the principle of "two more and two less", that is, water more in summer and less in winter; Large and medium-sized plants with vigorous growth should be watered more, and small plants newly planted in pots should be watered less.