Prevention and treatment of blueberry canker

Blueberry canker is one of the most common diseases of blueberry, which is more common and has more experience in prevention and control. So what are the symptoms of blueberry canker infection, how to identify, in what world, what bacteria cause, and then the characteristics of the bacteria, the route of transmission, are all what we need to understand, and then we can more easily prevent and control the harm of ulcer disease.

I. conditions for onset of the disease

The disease is caused by a fungus, generally through conidia with the help of Rain Water irrigation water to spread multiple infections, seeds, farming operations can also spread with bacteria. The pathogen overwinters in the diseased tissue and is the main source of infection. In general, the reproductive harm can come back after the temperature rises, and then the peak of the disease is from May to June, which mainly begins to infect in April, and the bacteria invade from the wound and the natural orifice, but the main inducement is the lack of anti-freezing measures in winter.

Second, symptoms

The pathogen mainly harms the base of the upper branch of the same year, and then the disease spot appears, which is like water-immersed and irregular, and expands at the beginning and later stage, around the whole branch. The disease spot is obviously different from the healthy part, and then the disease spot is reddish brown at the beginning or yellowish brown becomes dark black at the later stage. The disease spot is covered with black spore spots. The leaves turned brown after the damage.

III. Prevention and control measures

1. Pruning

Cut off discolored branches during dormancy because they may be susceptible to disease and prevent it from happening. Provide sufficient fertilizer and water to let the branches grow quickly. But too much fertilizer is also bad for blueberries. When diseased branches are found in the garden, they should be cut off in time and taken out of the garden to be concentrated and buried or burnt diseases are easy to occur when anti-freezing is poor in winter, so pruning should be checked frequently in winter.

two。 Selection of species and sites

Planting blueberries should choose excellent varieties with relatively disease resistance, strong adaptability, and non-toxic seedlings cultivated by special technology. The planting land should be in a higher place far away from the river, requiring dry, breathable, fertilizer-preserving, non-sticky loam.

3. Medication

When diseases are found, pruning should be done in time. If seriously diseased plants are found, they can be pulled out, changed soil, and disinfected the soil and surrounding environment. Spray in sunny days, in case of rain spray, mainly spray 20% prothiazole suspension 500 times. In addition, if you have a comprehensive disease, you should try your best to save it. Generally, you should use the above drugs to smear the disease area. If the disease spot is large, you may have to scrape off the disease spot and then prevent and cure it. Smear every three days, serious can be once a day, smear three to four times in a row, basically improve.

The occurrence of canker is common in common blueberry diseases, that is, the main diseases that often need to be controlled. the above contents briefly introduce the occurrence and control of diseases, provide reference, thank you for reading.