1、 Anthrax

This is an important disease of avocado. It has a strong ability to harm the fruit. At the same time, it will also infect leaves, flowers and twigs. Diseased fruits will first grow diseased spots, which are generally no more than 5mm in diameter and round in shape. After that, the lesion will gradually expand and sag inward. When the fruit is ripe, it will invade the pulp and lead to decay. The diseased branches and leaves need to be cut off to avoid mutual infection. Fruits need to be stored at low temperature after harvest, and damage should be avoided during transportation

2、 Scab disease

The disease is similar to anthrax. After the disease, round brown protrusions will appear, and then slowly turn into light purple. When the fruit is mature, the middle will be concave and the peel will become rough. Although the disease will not affect its taste, it looks very ugly. In the early stage of the disease, there will be brown spots on the leaves and the surface will shrink. At this time, the leaves need to be cut off to avoid further deterioration. At the same time, Bordeaux liquid should be sprayed, which can have a therapeutic effect

3、 Cercospora spot

Cercospora spot mainly damages leaves, stems and fruits. The infected fruit surface will form withered spots, and then the epidermis will crack, which will lead to the invasion of other bacteria and the corruption of the pulp. At the beginning of the disease, there will be brown spots on the leaves, with a diameter of 2-5mm, and then turn purple, which will spread to both sides of the leaves and have irregular shapes. After getting sick, we should spray copper preparation and azoxystrobin in time, so that we can effectively prevent and control it

4、 Small hole shell fruit rot

At the beginning of the disease, red spots will appear on the peel, and then the bacteria will infect the inside of the fruit. There will be brown stripes on the pulp and purple brown spots around the fruit pedicle. When it matures, the disease spots will become black and sunken, the fruits will shrink, the surface will be covered with mycelium, the interior will rot, and give off an unpleasant smell. After the disease is found, the sick branches and shoots should be cut off immediately, the dead branches and diseased fruits should be removed, and appropriate fertilization should be applied to increase its disease resistance