Orange yellow dragon disease
2019-06-06 00:03:25
Citrus huanglongbing is a devastating disease that spreads rapidly and the existing citrus cultivars are susceptible. Therefore, comprehensive measures must be taken to prevent and treat citrus yellow au dragon disease in order to obtain good results.
1. Strict implementation of quarantine shall strictly prohibit seedlings and diseased materials (such as scion) in the ward, and transfer them to the new area and the non-disease area. In wards, diseased or disease-causing nursery stocks should be planted in a controlled and relatively concentrated manner to prevent further spread. Should the newly-opened orchards use disease-free seedlings?
2. The establishment of a disease-free nursery and the cultivation of disease-free seedlings are the key measures for prevention and treatment of citrus huanglongbing. It is necessary to cultivate disease-free seedlings without huanglongbing disease and certain dangerous diseases (such as ulcer disease, split disease, etc.). . New orchard species for new and disease-free areas?
3, remove diseased plants. Given that there is currently no effective way to treat citrus trees with yellow dragon disease. The diseased tree stays in the field and is a source of disease. Therefore, as soon as it is discovered that it is a tree of Huanglong disease, immediate removal is an important measure to prevent the spread of Huanglong disease. The practice is: Every spring, summer, and autumn, especially during the autumn shoot period, carefully examine the plants one by one and find diseased or suspicious strains. Immediately excavate and burn them out. Before cutting the diseased tree, spray 40% omethoate 1000 times solution on the diseased trees and nearby plants to prevent the citrus lilies from spreading from diseased trees to the surrounding areas. New citrus garden with incidence less than 10% and old citrus garden with incidence less than 20%. Can disease-free seedlings be used after removing diseased plants?
4. Prevention and control of citrus hibiscus, citrus hibiscus are mediator insects that transmit yellow dragon disease. It grows on sprouts and shoots of citrus. Through the control of water and fertilizer to control the pull-tip, so that the new shoots out of the same orderliness, shortening the suction period. When the new shoots are sent to 1-2 cm, the insecticide is sprayed 1-2 times. In the winter, citrus hibiscus likes to fly over the wintering of Kirixiang near the orchard. Spraying insecticides on hariri has a certain effect on reducing the number of hibiscus. In addition, the planting of protective forest around the orchard may hinder the movement of rafts.
5, to strengthen management, in particular, to strengthen the results of the tree water and fertilizer management, maintain a strong tree vigor, improve disease resistance, to reduce the occurrence of Huanglong disease and the loss caused by illness, has an important role.
6. Transform the ward into a new district. For some orchards with very serious citrus yellowing disease that have lost economic value, the wards should be rehabilitated, that is, the citrus trees of the entire orchard (including those citrus trees that may have been infected but have not shown symptoms) Excavate, and then use disease-free citrus seedlings to replant diseases and strengthen management, the ward can be transformed into a disease-free new area.
1. Strict implementation of quarantine shall strictly prohibit seedlings and diseased materials (such as scion) in the ward, and transfer them to the new area and the non-disease area. In wards, diseased or disease-causing nursery stocks should be planted in a controlled and relatively concentrated manner to prevent further spread. Should the newly-opened orchards use disease-free seedlings?
2. The establishment of a disease-free nursery and the cultivation of disease-free seedlings are the key measures for prevention and treatment of citrus huanglongbing. It is necessary to cultivate disease-free seedlings without huanglongbing disease and certain dangerous diseases (such as ulcer disease, split disease, etc.). . New orchard species for new and disease-free areas?
3, remove diseased plants. Given that there is currently no effective way to treat citrus trees with yellow dragon disease. The diseased tree stays in the field and is a source of disease. Therefore, as soon as it is discovered that it is a tree of Huanglong disease, immediate removal is an important measure to prevent the spread of Huanglong disease. The practice is: Every spring, summer, and autumn, especially during the autumn shoot period, carefully examine the plants one by one and find diseased or suspicious strains. Immediately excavate and burn them out. Before cutting the diseased tree, spray 40% omethoate 1000 times solution on the diseased trees and nearby plants to prevent the citrus lilies from spreading from diseased trees to the surrounding areas. New citrus garden with incidence less than 10% and old citrus garden with incidence less than 20%. Can disease-free seedlings be used after removing diseased plants?
4. Prevention and control of citrus hibiscus, citrus hibiscus are mediator insects that transmit yellow dragon disease. It grows on sprouts and shoots of citrus. Through the control of water and fertilizer to control the pull-tip, so that the new shoots out of the same orderliness, shortening the suction period. When the new shoots are sent to 1-2 cm, the insecticide is sprayed 1-2 times. In the winter, citrus hibiscus likes to fly over the wintering of Kirixiang near the orchard. Spraying insecticides on hariri has a certain effect on reducing the number of hibiscus. In addition, the planting of protective forest around the orchard may hinder the movement of rafts.
5, to strengthen management, in particular, to strengthen the results of the tree water and fertilizer management, maintain a strong tree vigor, improve disease resistance, to reduce the occurrence of Huanglong disease and the loss caused by illness, has an important role.
6. Transform the ward into a new district. For some orchards with very serious citrus yellowing disease that have lost economic value, the wards should be rehabilitated, that is, the citrus trees of the entire orchard (including those citrus trees that may have been infected but have not shown symptoms) Excavate, and then use disease-free citrus seedlings to replant diseases and strengthen management, the ward can be transformed into a disease-free new area.
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