Control of common diseases and insect pests in pear trees

Sydney is a kind of fruit with high nutritional value, especially in heat-clearing and detoxification, and it has high medicinal value. But the pear tree is a kind of tree species that is easy to get sick. Below, the pro-agricultural network will introduce some common pear diseases and insect pests and their control methods to solve some troubles.

1. Pear aphid

This is one of the most common parasite pests in pear trees, which mainly likes to intercept the nutrients of pear trees on the leaves, which will seriously affect the fruit rate of pear trees. The symptom was that the pear tree leaves attached to the pear aphid larvae, which began to shrink into a cylinder with the passage of time, and finally led to shedding. It is generally found that such leaves should be removed and burned in time to avoid infecting more places. At the initial stage, they can be removed manually to solve serious problems. 3000 times parathion EC can be sprayed for prevention and control.

2. Pear scab

That is, the so-called pear scab often occurs at the initial stage of fruit, which leads to abnormal growth of fruit and pathological changes caused by excessive humidity. The disease is characterized by the appearance of spotted traces on the surface of pears, and then slowly mildew and blackening, resulting in the withering of the whole fruit, plus pear scab is a mass disease, which should be dealt with in time after it is found. Guoshangling, Tetrazole and Black Star Suke powder are commonly used in the treatment of this disease, and they can also be sprayed with 80-1000 times of Nova emulsion to prevent it in advance.

3. Pear tree rust

This disease is especially harmful to leaves, and the damage to young pears is also on the high side, mostly concentrated in the temperature alternating period with high humidity. The upper part of the leaf shows rust-like spots, and then slowly dries up; the upper part of the fruit shows dry and necrotic ends. Cypress and the like will seriously increase the incidence of the disease, which should be noted. Spray 1500-2000 times of trimethoprim EC in the prone season for prevention, twice a month for two months. If the disease occurs, it will be treated with 20% trimethoprim 600 times solution.

4. Pear heart borer

This is one of the most feared parasites in pear fruit. Once found, Sydney is hopeless and rotten. Therefore, early prevention and treatment after the onset of the disease must be timely and attention. Mostly because the parasite enters the fruit at the initial stage, the fruit becomes more and more obvious as the worm grows. For the diseased fruit directly removed and taken out of the orchard to be destroyed, the surrounding trees should be sprayed immediately. Thiazuron and thiazuron 3 are two common treatments.

Once the pear tree is sick, we must pay attention to it, otherwise the infection will be very serious. Therefore, everyone's daily inspection of the orchard should be more careful, do not be reluctant to give up the use of various chemicals, and so on, the loss will be even greater after the disease is serious. Those who also want to know some other knowledge of pear trees can follow our website.