Sichuan citrus seedling wholesale oil spot disease, commonly known as Indian disease, only occurs on mature or nearly mature citrus fruits. Ill fruits will produce irregular yellow and white spots of different sizes, generally 2-3 cm in diameter, and some fruits will expand to more than half of the fruit surface. The obvious symptoms are: the oil cells in the focus are prominent, the tissues in the oil cells are depressed downward, and the oil cells in the focus retreat in the later stage, and the spots turn yellow-brown. Oil cells themselves will not cause fruit rot (explanation: rot; Rot, often refers to leaf rot), but after the disease spot dies, it is easy to be infected by Penicillium and fungi, leading to fruit rot.
Pathogenic condition
Oil spot disease is a physiological disease, which is caused by orange peel oil seeping from pericarp cells under wet conditions. The causes of oil spot disease can be divided into two categories: before harvest, the fruit was stabbed by red cicada when it was ripe, or it was caused by strong wind and heavy rain when it was ripe; Mechanical damage caused by human beings in the process of picking, storing, transporting, washing and packaging. There are two strong winds and heavy rains in the mature period of local medium-ripe citrus, and the rest are warm during the day and cold at night, which is easy to be infected with this disease.
Prevention and cure method
1. If the fruit is damaged by leafhoppers, 80% dichlorvos can be sprayed 2000 times.
2, fruit should be carried out after the dew is dry, rainy days and when the dew is not dry. Wogan is a late-maturing hybrid citrus variety. Strong growth potential, the crown of the tree is naturally round at first, and gradually opens after the fruit. There are short thorns on the branches.
3. When picking fruits, use fruit scissors, cut one fruit twice and cut the fruit handle flat (bǐng). When picking, handle with care. The fruit basket should be padded with sponge or cloth, and the inside of the fruit basket should be smooth, preferably with paper.
4. Fruits should be pre-stored for 2-3 days before packaging to avoid peel damage during transportation, packaging and transportation. At the same time, ripening agents should not be added to the washing liquid of fresh fruits. China is one of the important origins of citrus and a new variety of citrus. Citrus is rich in resources and excellent in varieties, with a cultivation history of more than 4,000 years. After long-term cultivation and selection, citrus has become a precious fruit of human beings.
Jianyang city Jin Dong Nursery Planting Professional Cooperative has long provided plum seedlings, Sichuan citrus seedlings wholesale, loquat seedlings, pear seedlings and peach seedlings. It has many years of experience in planting fruit seedlings with good quality and high survival rate. Its business covers Sichuan, Guizhou, Guangxi, Chongqing, Hubei, Yunnan and other places.