Common diseases and insect pests of green trees and their control methods

I. Disease and its prevention and cure

1. Leaf spot

If it does not create a ventilated atmosphere when it is hot and rainy in summer, it is easy to catch the disease.

2. Disposal measures

To strengthen the circulation of air, strengthen the light, the leaves can not have stagnant water for a long time. If there are few sick leaves, remove them in time and burn them. Spray it with 50% carbendazim every 15 days, three or four times in a row, and you can recover. If you are raised at home, you can apply Dakening cream at the initial stage of the disease, which is helpful to it.

II. Pest control and prevention

1. Scale insects

If the degree of temperature and humidity is very high, it is not ventilated and airtight, especially in autumn and winter, if you put it in the greenhouse for a long time, it will be easy to get this bug on the trunk and leaves.

Solution: give it ventilation and humidity control, if there are few worms, you can remove them directly, such as transparent glue. If there are a lot of insects, spraying with 25% propofol, such as parathion, is also very effective.

2. Mites

The general symptom is that the newborn leaves are crumpled, curled up and uneven. It usually occurs from June to September and rarely occurs if it is hot and dry and rarely occurs if it is humid.

Solution: can be treated with mijing, or other drugs to kill mites.

3. Aphids

A common occurrence is the green peach aphid. If the insect is born, the leaves will be deformed and crumpled, and bright honeydew spots can be seen. The worm can be seen with the naked eye.

Solution: spray with omethoate, or kill the enemy.

III. Daily maintenance

It is suitable for growing at 20 to 30 degrees. If it is higher than 30 degrees, it should be shielded from the sun, sprinkle its surroundings with water, or move to a cool and windy area. If it is below 10 degrees, you will have to move to your home or greenhouse. It can't be lower than five degrees, it will hurt the leaves. If you leave it in a lightless area for a long time, the leaves will fall easily. If you keep it at home, you can put it on a high place with light in winter, which is beneficial to receive light.