Prevention and control of dragon fruit canker

There are many diseases and common diseases of dragon fruit. Canker is introduced today because it is a very common disease. This disease is prevalent in summer and mainly harms stems and fruits. Therefore, we should pay attention to prevention and treatment, grasp the source, reduce the harm as far as possible, and improve the symptoms. So today we will mainly talk about some characteristics and prevention of dragon fruit canker.

I. manifestation of the disease

After the beginning of infection, small green spots will grow on the stem, and the spots will gradually turn yellowish brown, and then the spots will gradually expand, some connect, begin to sunken, darker in the middle, blacken the outer edge, and the spots are inconsistent. The disease spot is yellow and rusty, and the disease spot is nearly round, but somewhat irregular. In the end, the whole affected part yellowed, rotted and dried up when dry.

Second, the cause of the disease

Fungal diseases, which mainly occur in high temperature and humidity environment, begin to occur after the temperature rises at the end of spring, and will be complicated with soft rot and other diseases. Germs like a warm environment, dragon fruit grows in the tropics, and the disease condition is very good. Generally speaking, after a typhoon passes through, the humidity is very high, and the disease will break out when the temperature is high. After infection, the bacteria will have an incubation period of a week, and the bacteria will then produce conidia on the plaque, which can be infected repeatedly.

III. Prevention

In the early stage of stem growth, 300-fold solution of Liangguoan was used for prevention, and 600-fold solution of Vofengsu was used for spray to supplement nutrition and antibacterial repair. When cutting, use Qingku Rick dipped in the root to promote wound healing, do not sterilize contact with soil, easy to infect germs. After the heavy rain, spray the medicine again to prevent it. Usually should pay attention to insect prevention, do not cause wounds, easy to infection.

IV. Treatment

After the onset of the disease, medication, first cut off the diseased branches, smear disinfectants, wound healing agents, such as "Kuifuling"; and then spray Liangguoan, garlic oil, Wofengsu together. If the disease is serious, Kuifuling plus Qingkulike should be used together with drug root irrigation treatment, which is more direct and effective, and ammunition combined with spraying to eliminate conidia. The diseased branches cut should be burned, the garden should be cleared completely, and healthy plants should also be sprayed to prevent latent.

Pitaya canker is a fungal disease, the harm is extensive, common damage, and very serious, focus on prevention. For treatment, drugs should be used both above ground and underground, the effect is relatively fast, and seriously diseased strains can be removed and sterilized. As soon as you get sick, all should be sprayed.