The specific climatic conditions in Zigui are most suitable for the growth of Wan Lun navel orange. The specific climatic conditions and the land below 300 meters above sea level on both banks are warm and humid, which is most suitable for the development of a late-maturing variety-Wan Lun Navel Orange. It has a unique growing environment, fertile soil and plenty of sunshine, and the sunshine time exceeds 3000 hours every year. It is the famous "hometown of navel oranges in China".

Wan Lun orange is suitable for planting in areas where the annual average temperature is above 17.5℃ and the average extreme minimum temperature for many years is above -3℃. The best planting area of Wan Lun orange is: the annual accumulated temperature is 5500 ~ 6500℃, navel orange is suitable for planting in the area with large temperature difference between day and night from the end of February to March before fruit ripening, and winter frost or frost appears after the end of 65438+February or in a short time, and it is suitable for planting in the middle and upper reaches of the Yangtze River and can develop moderately. However, when planted in areas with less heat conditions, the fruits are small and irregular in size.

Field Management of Citrus in Wan Lun

Implement technical measures such as pruning, garden cleaning, drainage and shoot control. , strengthen the cultivation management, enhance the tree potential, and improve the tree's own ability to resist pests and diseases. By using light to control pests, we can use frequency vibration insecticidal lamp or black light lamp to lure or drive away phototactic pests such as fruit sucking moth, scarab, leaf curl moth and so on. Chemotaxis and sex attractants can be used to control pests. Insecticides can be added to sugar solution and vinegar to trap and kill chemotactic pests, such as fruit sucking moths and leaf curl moths.

Artificial capture of pests, such as longicorn beetles, scarabs and other pests. Artificial introduction, reproduction and release of natural enemies, such as predatory mites, drifting insects, Trichogramma and other mites, scale insects, leaf rollers and other natural enemies. Biological pesticides and mineral pesticides, such as Bt (Bacillus thuringiensis), Beauveria bassiana, avermectin, Nong Kang 120, nicotine, matrine, azadirachtin, rotenone, turpentine mixture, engine oil emulsion, diesel oil emulsion, yubiqing and various drugs made of copper sulfate and sulfur.