The latest common diseases of Hawthorn and their control

Sour and sweet may be Hawthorn, as the nutritional value of Hawthorn is gradually discovered, the market demand is increasing. So more and more people begin to plant on a large scale, but many people start without any preparation, but they do not realize that they will encounter many diseases in the planting process, but they do not know how to prevent and cure them. So what kind of disease will Hawthorn produce? How to prevent and cure it? Let's take a look at it with the editor.

1. Leaf spot

Disease characteristics: leaf spot disease harms the leaves, after the leaves are infected, there will be yellow irregular patches on the leaf surface, and the color will gradually become darker, the plaques will gradually extend and expand, and finally the whole leaf will become brown patches. And there will be many small black spots on the plaque, these small black spots are the conidia of the bacteria, making the leaves withered and yellow and deciduous, affecting plant photosynthesis.

Prevention and control methods: after harvest in autumn and winter, the disease, insect and old branches and old leaves in the orchard should be cleared out in time, burned away from the orchard, reduce the germs in the orchard, strengthen the management of the orchard, use medicine and fertilizer rationally, and improve the resistance of the tree. In the early stage of plant disease, thiophanate methyl and other agents can be used to control the disease.

2. Scab

Disease characteristics: Hawthorn infected with scab will begin to develop on the back of the leaf, less dense mildew spots will appear on the back of the leaf, these mildew spots will begin to expand, and finally merge to form brown patches on the back of the leaf. irregular disease spots with light green will also appear on the leaf surface. When out of control, all the patches on the whole leaf fuse, and finally, like leaf spot, the whole leaf loses nutrition and falls.

Prevention and control methods: regularly inspect the orchard, carefully check the growth of each tree, find abnormal fruit trees to remove the leaves and fruit branches in time, if any have fallen, also pick up the orchard in time. To prevent germs from lurking on these diseased bodies during the winter, Shigao Water Dispersive and other drugs can be sprayed at the initial stage of the disease, once a week for a month.

3. Flower rot

Disease characteristics: flower rot will not only harm the flowers, but also occasionally invade the tender shoots of young leaves. When the young leaves begin to get sick, stripes appear on the leaves, which spreads quickly and can spread to half of the young leaves of the plant about a week later. Flowers become more serious when they get sick, causing them to rot and fall. The incubation period of fruit infection is longer, but the symptoms are similar to flowers.

Prevention and control methods: like the former two, strengthen orchard management, do a good job of clearing the orchard in autumn and winter, find that falling fruit and flowers should take them out of the orchard in time, control the soil water content of the orchard and discharge the excess water. Control the shape of the fruit tree, prevent the injury of the fruit tree, harvest attention, do not pick the fruit violently. Carry on the prevention treatment to the fruit tree, spray the appropriate amount of ethyl aldicarb and other chemicals to prevent. Fu Ke wettable powder can be used for prevention and treatment after the disease.

The above are common diseases in the process of planting Hawthorn, although Hawthorn disease resistance is relatively strong, but if the management is not in place, there is still a certain probability of disease. Don't take a chance, or you will be caught by surprise when there is a real disease. The editor only talked about three kinds today, and some of them don't happen very often, so they don't go into detail. The main thing is to do a good job in orchard management, which is the best way to prevent it.