Comprehensive prevention and control method of pitaya brown rot based on precise pesticide application and application thereof

Abstract

The invention discloses a comprehensive prevention and control method of pitaya brown rot based on precise pesticide application and application thereof. Based on the continuous research on the infestation regularity of the pitaya brown rot and screening of a fungicide with a long lasting period and a good systemic property, according to the characteristic that pathogenic bacteria mainly damage tender branches, the prevention and control focus is put on protecting the tender branches through precise pesticide application, by bringing the disease prevention and control period forward, the source of initial infection is reduced, diseased fruit-bearing branches are gradually replaced to reduce the fruit damage rate, and the purpose of effectively controlling orchards with severe pitaya brownrot is achieved. Through years of field trials and demonstrations, the method can effectively control the occurrence and damage of the pitaya brown rot in the field, and greatly reduce the frequency of pesticide application and the cost of labor and pesticides.

Description

technical field [0001] The invention belongs to the technical field of plant protection, and in particular relates to a method for comprehensive prevention and control of dragon fruit brown rot based on precise pesticide application and its application. Background technique [0002] Dragon fruit (Hylocereus undatus) is a perennial climbing succulent plant belonging to the cactus family. It is native to Central America such as Brazil and Mexico. In the early 1990s, after the successful introduction and trial planting in Taiwan, my country, it was introduced to the mainland. At present, dragon fruit has been planted in large areas in Guangxi, Guangdong, Hainan, Fujian, Guizhou, Yunnan and other places in my country. Dragon fruit has become one of the important economic crops for farmers to get rid of poverty and become rich. [0003] Dragon fruit brown rot, also known as canker, caused by Neoscytalidium dimidiatum infection, is a devastating fungal disease that seriously thre...

AI Technical Summary

Problems solved by technology

[0004] At present, the prevention and treatment of pitaya brown rot mainly relies on chemical pesticides, but there are not many effective pesticides to choose from. Fruit farmers often use several fungicides in combination. During the peak of the disease, chemical pesticides are sprayed almost once a week, resulting in A lot of waste of financial and material resources and environmental pollution, and the long-term use of chemical pesticides is likely to cause risk of drug resistance

In addition, 4 to 6 batches of dragon fruit can hang in a year. Often in the same orchard, some have just bloomed and some have matured. It is not easy to choose the timing of chemical application, and it is easy to cause pesticide residues in the fruit to exceed the standard, affecting quality and safety.

Dragon fruit can be damaged by brown rot throughout the growing season. The most serious disease in South China is from May to September every year. At this time, it is often a high temperature and rainy season. The field control effect of relying solely on chemical pesticides is relatively poor, and there is an urgent need for production. A precise, efficient and safe comprehensive prevention and control method for dragon fruit brown rot

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