In recent years, apple rot disease has been serious and has a wide range. From saplings to senescence trees to varying degrees, and even some trees die, causing the destruction of gardens. Fruit farmers refer to rot as the “cancer” of fruit trees.

Recently, Professor Andong Derong of the Northwest A&F University has made critical progress in the “Mechanism of Apple Rot Disease and New Pollution Prevention Technology”. The author recently conducted a special interview with the doctoral tutor of the College of Plant Protection of Northwest Agriculture and Forestry University. , to explore how Apple's "cancer" was cracked.

In 2003, the apple cultivation area in Shaanxi ranked first in the country, and the output was only after Shandong, ranking second in the country. The apple industry has become one of the six pillar industries in Shaanxi Province. To do a good job in the development of the apple industry is conducive to solving the “three rural issues” and plays a decisive role in promoting the rapid development of Shaanxi's economy. However, in recent years, the widespread incidence of apple rot has cast a shadow on the development of the apple industry in Shaanxi. Although a large number of researches on the prevention and control technologies of the disease have been conducted in the world and some results have been achieved, the epidemic and harm have not been truly controlled. The main reason is that there is no integrated prevention and control based on the law of incidence.

Anderong observed through orchard observation and laboratory analysis and found that the harmful parts of Shaanxi apple rot disease occurred in different locations of different ages. The hazardous symptoms were ulcer type and branch dry type, of which the ulcer type was the main type and the branch type was rare. Two kinds of pathogenic bacteria were isolated from the pathogenic tissues collected from 15 counties in the apple producing area. The pathogens were identified according to the Koch's law, and the original bacteria that caused the apple rot disease were identified as C. capsulatum and P. capsulatum.

The occurrence of rot disease damage has two peaks. New infectious lesions begin to appear in March each year and begin to expand; the first incidence peak occurs in May-June, and the number and expansion suddenly drop in July; August and September The second peak of onset occurred in the month; it basically stopped in late October. There were no new lesions and lesions spread from November to March of the second year. In addition, Andre also found that the degree of damage caused by apple rot disease is affected by factors such as planting density, age, variety, soil type, orchard landform features, and management level. He passed the best predictive model of apple rot disease established in Luochuan County, and the results of the back test were consistent with the measured results. The prevalence of the test was mainly related to the average temperature in March, December, and the relative humidity in August. The impact of rainfall in July.

On the basis of revealing the mechanism of apple rot disease, Anderung exerted his own professional advantages in the research and development of biological pesticides, and used a type of polymer polymer emulsion produced by the synthetic resin industry that replaced organic solvents with water instead of organic solvents. The stability of the phytohormone, which is easy to penetrate into the plant, synthesizes a non-polluting wound healing agent PND. After testing its stability and field efficacy trials, and conducting wound healing investigations and data analysis, the results showed that the non-polluted wound healing agent PND had a wound healing rate of 59.1% for apple disease, which is superior to the current prevention of apple rot disease. Pharmacy provides a new approach for the prevention and control of apple rot disease and the pollution-free production of apple. At present, the pharmaceutical agent is applying for relevant national production licenses.

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