Huanglongbing is quite scary. I hope the following suggestions will be useful to you: 1. Strictly implement quarantine. Seedlings and disease-carrying materials (such as scions) from diseased areas should be strictly prohibited from being transported to new areas and disease-free areas. In diseased areas, diseased or potentially diseased seedlings should be planted relatively concentratedly in controlled areas to prevent further spread. New orchards must be planted with disease-free seedlings. \x0d\\x0d\ 2. Establishing a disease-free nursery and cultivating disease-free seedlings are key measures to prevent and control citrus greening disease. It is necessary to cultivate citrus greening disease-free plants and certain dangerous diseases (such as canker and cracked skin disease). etc.) disease-free seedlings. For planting in new orchards in new areas and disease-free areas. \x0d\\x0d\ 3. Dig out diseased plants. There is currently no effective method to treat citrus trees suffering from Huanglongbing. Diseased trees left in the field are a source of disease. Therefore, once a tree with Huanglongbing disease is discovered, it should be dug up immediately as an important measure to prevent the spread of Huanglongbing disease. The method is: carefully inspect the three shoot stages of spring, summer and autumn every year, especially the autumn shoot stage. If any diseased or suspected diseased plants are found, they should be dug up and burned immediately. Before digging out the diseased tree, the diseased tree and nearby plants should be sprayed with chemicals such as 40% omethoate solution 1000 times to prevent the citrus psyllid from transferring from the diseased tree to the surrounding areas. In new citrus orchards where the disease rate is less than 10% and in old citrus orchards where the disease rate is less than 20%, disease-free seedlings can be replanted after the diseased plants are dug out. \x0d\\x0d\ 4. Prevent and control citrus psyllid, which is the vector insect that spreads Huanglongbing. Grows on the new shoots and shoots of citrus. By controlling water and fertilizer, shoots are controlled to make the new shoots extracted uniformly and shorten the shoot period. When the new shoots grow to 1-2 cm, spray insecticide 1-2 times across the entire area. In winter, citrus psyllids like to fly to mulberry trees near orchards to overwinter. Spraying insecticides on the mulberry trees has a certain effect on reducing the number of psyllids. In addition, planting protective forest around the orchard can hinder the migration of psyllids. \x0d\\x0d\ 5. Strengthen management, especially water and fertilizer management of fruit-bearing trees, maintain tree vigor and improve disease resistance, which plays an important role in reducing the occurrence of Huanglongbing and losses caused by the disease. \x0d\\x0d\ 6. Transform the ward into a new area. For some orchards where citrus greening disease is very serious and has lost economic value, disease area reconstruction should be implemented, that is, all citrus trees in the entire orchard (including those that may be infected but have not yet shown symptoms) Dig up and replant with disease-free citrus seedlings. By doing a good job in preventing pests, digging out diseased trees in a timely manner and strengthening management, the diseased area can be transformed into a new disease-free area. Although not original.

But I still hope that I will accept it because I have no merit but hard work