Can citrus huanglongbing spread to other fruit trees and can it be treated

Don't let a diseased citrus seedling destroy the entire citrus orchard, we must treat the entire citrus orchard without a diseased nursery and develop the use of citrus seedlings that have been sterilized, you can learn about it on the China grapefruit network.

Citrus yellow disease is a disease that will occur in spring, summer and autumn, the most obvious symptom after its occurrence is the yellowing of leaves, and when the citrus leaves turn yellow, it can be divided into three kinds of symptoms, one is uniform yellowing, one is mottled yellowing, and the last is yellowing of the head deficient. Young saplings tend to be sick in the middle of spring, when the leaves at the treetops turn yellow first. After the appearance of huanglongbing disease in citrus trees, a variety of symptoms will occur, such as fruitlessness, fruit deformity, and lack of light green lines of fruits.

The prevention and control method of citrus huanglongbing disease 1, drug prevention and control of huanglongbing with the occurrence of citrus huanglongbing, scientists have also studied a special drug, now the prevention and control of huanglongbing with drugs has become an ideal way to prevent this disease, people can use huanglongbao fertilizer spraying, can be sprayed with chlorhexanin to prevent citrus deficiency symptoms, in the spring of each year timely medication, can effectively reduce the occurrence of huanglongbing. 2, isolation infection citrus huanglongbing is a very contagious disease, found that the fruit tree disease, must not be distressed, it is necessary to timely root control, and to clean up the environment, when cultivating new citrus seedlings, to stay away from the incidence area of huanglongbing, and use plastic greenhouses to isolate seedlings, in order to prevent infection, in addition to strictly control the occurrence of citrus psyllids in the spring, this pest is an important way to spread citrus huanglongbing.

Since citrus huanglongbing is a quarantine disease, there is no effective prevention and control method after the disease occurs. Therefore, the most important thing in terms of prevention and control measures is to put quarantine measures in the first place. According to the requirements of relevant quarantine regulations, it is strictly forbidden to transfer seedlings from disease-prone areas to prevent diseased seedlings and ears from entering disease-free areas; In the newly developed orange orchards in disease-free areas, strict quarantine should be implemented for citrus seedlings and scion transferred to the new areas.

Second, establish a relatively isolated disease-free seedling breeding base. The base must be located in a non-diseased area, and it is required to be free of poison-transmitting insects - psyllids; Rootstock seeds should be harvested from disease-free trees and soaked in 50 52 hot water for 5 minutes, then soaked in 55 56 hot water for 50 minutes; Scions should be harvested from high-yielding, high-quality mother trees that have been identified as non-toxic. If a garden is built in a sick area, it should be done one year after the entire plant has been removed.

Third, strengthen cultivation management, make the branches neatly drawn, and control citrus psyllids. In each tender shoot extraction period, use 90% crystal trichlorfon 800 times or 25% imithion emulsifiable concentrate 400 times, 200 times rotenin, pine resin mixture 15 20 times solution, for prevention and control. Fourth, if a diseased tree is found, it should be reported to the quarantine department in a timely manner, and the diseased tree should be dug up in time.

The whole garden of the seriously ill garden is dug up, and tetracycline ** can also be used for lightly diseased trees, but it does not receive good results. The method is to drill a hole at the base of the main trunk, the depth of the hole is about 2 3 of the diameter of the main trunk, and then inject the liquid medicine with a pressurized syringe from the orifice. Each adult tree is injected with 2 5 liters of tetracycline hydrochloride solution.

Hello! Citrus huanglongbing is a devastating disease in the world's citrus production, mainly with citrus psyllids as the vector, but also with the help of grafting, dodder seed transmission, effective control of the number of orchard citrus psyllid can control the outbreak of orchard huanglongbing. Diseased seedlings or diseased scion are the main causes of long-distance disease transmission, which often turns disease-free new areas into diseased areas.

Strengthen cultivation management, each new shoot is drawn neatly, and unified spraying prevention and control. Spray pesticides for the first time at the budding stage to prevent adults from laying eggs in the bud gaps. Pesticides are mainly organophosphorus, and dimethoate oxide or engine oil emulsion can be selected.

Strengthening winter garden spraying and eliminating citrus psyllids with poor activity during the wintering period is the key to year-round control.

Adjust the variety structure of fruit trees, and do not plant rutaceae plants such as yellow bark and nine mile in citrus production areas, so as to prevent citrus psyllids from transferring hosts.

Summary. 1. Spraying to kill lice Citrus psyllids are the only field vector of citrus huanglongbing, and it is the main way of close transmission of huanglongbing. It carries the poison for life after sucking the sap of the huanglongbing plant, and it is transferred to the healthy plant to harm the infectious bacteria.

Therefore, in order to prevent the spread of huanglongbing, it is necessary to kill the psyllids in time.

1. Spraying to kill lice Citrus psylloid is the only field transmission medium of citrus huanglongbing, and it is the main way of close transmission of huanglongbing. It carries the poison for life after sucking the sap of the huanglongbing plant, and it is transferred to the healthy plant to harm the infectious bacteria. Therefore, in order for huanglongbing disease not to continue to spread, the paralyte must be killed in time.

2. Cutting down the diseased trees in the citrus orchard is an important source of the spread of huanglongbing, and the diseased plants should be eradicated in time to reduce the source of the disease. The fewer diseased trees there are in the park, the less chance that psyllids will be able to feed on diseased trees and the lower the chance of spreading pathogens. Before eradicating the diseased tree, spray the lice first, after spraying for three or five days, after the wood stuffy foot lice on the tree are completely dead, cut off the huanglongbing disease tree near the ground, and the diseased tree will be stranded in place first, and then drag out of the orchard after the leaves on the tree are dry and the ants are high.

3. After cutting down the diseased tree, don't think that you can relax Lu Ziyan, but also deal with its root and dig out all the roots. Alternatively, you can use glyphosate or glufosinate-ammonium, or you can pour discarded morning oil on the tree pocket, and then wrap it in black plastic film socks for covering, so that it does not see light, cannot sprout and regrow, and will naturally dry up and rot in the future.

Summary. Hello, your question teacher will help you inquire as follows: although there is no effective prevention and control method for citrus huanglongbing, it does not mean that we need to "stand still", but we need to take some preventive measures to reduce the probability of huanglongbing and ensure the stability, safety and sustainability of citrus production.

The following are some measures summarized in the prevention and control of huanglongbing in some places, as follows:1Start with citrus seedlings.

Pathogens and vectors are the two necessary conditions for the occurrence of citrus huanglongbing. Cheng Chunzhen et al. pointed out in an article published in 2013 that the most important channel of citrus huanglongbing pathogen in specific orange orchards is diseased seedlings and scion, or the feeding and infection of mysterial psyllids. Therefore, when we carry out new orchard construction or high grafting and replanting, we must use virus-free seedlings and scion that have been tested and qualified by formal institutions, so as to reduce the occurrence of huanglongbing in citrus orchards.

Tips: Virus-free seedlings should be used in containers for more than 2 years, and the effect of preventing citrus huanglongbing is better. I hope the teacher's reply can help you!

Have a great day! Thank you!

Hello, your question teacher will help you inquire as follows: although there is no effective prevention and control method for citrus huanglongbing, it does not mean that we need to "stand still", but we need to take some preventive measures to reduce the probability of huanglongbing and ensure the stability, safety and sustainability of citrus production. The following are some measures summarized in the prevention and control of huanglongbing in some places, which are as follows:

1.Start with citrus seedlings. Pathogens and vectors are the two necessary conditions for the occurrence of citrus huanglongbing.

Cheng Chunzhen et al. pointed out in an article published in 2013 that the most important channels for citrus huanglongbing pathogens in specific orange orchards are diseased seedlings and scion, or feeding and infestation of psyllids with the fungus. Therefore, when we carry out new orchard construction or high grafting and replanting, we must use virus-free seedlings and scion that have been tested and qualified by formal institutions, so as to reduce the occurrence of huanglongbing frontal burial in citrus orchards. Tips:

The virus-free seedlings in Jizhou were more than 2 years old, and the prevention effect of citrus huanglongbing was better. I hope the teacher's reply can help you! Have a great day!

Thank you! What is the best pesticide to use to kill lice.

Specialized in the control of this type of pest - dinotefuran. It can be sprayed with 60% pymetrozi dinotefuran water-dispersible granules per mu, wild imitation limbs mixed with 30 50 kg of water per mu evenly sprayed, sprayed once every 7 10 days, sprayed 2 3 times in a row, and the effect of preventing and controlling pests above the world is very prominent.

Can huanglongbing's disease be cured with medicine.

It's not very likely.

It's a very serious disease.

If there are several branches in a plant, what should I do if there is huanglongbing?

Just cut it down if it's just a few.

Dispose of those branches and take a look.

If you think it's a pity to cut down the whole tree.

Summary. 1. How to prevent and control citrus huanglongbing?

The traditional anti-citrus psylloid agent for the prevention and control of citrus huanglongbing can be used bifenthrin, chlorpyrifos, clothianidin, thiamethoxam, etc., and then when the new shoots germinate, fast-acting pesticides can be used, such as:

bifenthrin resin 1000 times; chlorpyrifos 1000 times; 1000 times chlorocyanide chlorpyrifos, etc.

The second medication is 7-15 days after the first use, and the specific time interval is related to the effectiveness of the agent in different seasons, the interval is about 12-15 days in spring, and the interval between summer and autumn is about 7-10 days.

20% clothianidin 3000 times; 25% thiamethoxam 2500 times, etc.

2. New drugs for the prevention and control of citrus psyllids.

Although the above drug regimen is indeed effective in the prevention and control of citrus psyllids, the resistance of psyllids is also increasing, and highly pesticides such as chlorpyrifos have gradually withdrawn from the market due to their high toxicity, and the opponents of citrus psyllids have also appeared new faces

5% d-limonene, a natural insecticide extracted from orange peel, can break through the wax of the epidermis of citrus psyllids, so that psyllids lose water and die, which is a physical insecticide, this agent has strong lethality, how to prevent huanglongbing disease in citrus replanting.

1. How to prevent and control citrus huanglongbing? The traditional anti-citrus psyllids for the prevention and control of citrus huanglongbing can be used bifenthrin, chlorpyrifos, clothianidin, thiamethoxam, etc., and then when the new shoots germinate, fast-acting pesticides such as: bifenthrin 1000 times; 1,000 times the chlorpyrifos; 1000 times chlorocyanide chlorpyrifos, etc.

The second medication is 7-15 days after the first use, and the specific time interval is related to the effectiveness of the agent in different seasons, the interval is about 12-15 days in spring, and the interval between summer and autumn is about 7-10 days. 20% clothianidin 3000 times; 25% thiamethoxam 2500 times, etc. Second, the new drug for the prevention and control of citrus psyllids Although the above drug regimen is indeed very effective in the treatment of citrus psyllids, the resistance of psyllids is also constantly strengthening, and highly pesticides such as chlorpyrifos have gradually withdrawn from the market due to their strong toxicity, and the opponents of citrus psyllids have also appeared new faces: 5% D-limonene, a natural insecticide extracted from orange peel, can break through the wax of the skin of citrus psyllids, so that psyllids lose water and die, which is a physical insecticide, and this agent has strong lethality. Ask about custom messages].

How to prevent citrus huanglongbing? Citrus huanglongbing is a quarantine dangerous disease transmitted by citrus psyllids, once citrus is infected, its roots, stems, leaves, and fruits will carry pathogens, resulting in the loss of the ability of orange trees to bear fruit, and the branches to dry up until death. Teacher Tang Chunsheng believes that the occurrence of huanglongbing disease is non-selective.

Regardless of whether it is a strong tree or a weak tree, it can also be infected with huanglongbing. Citrus psyllids may also be more susceptible to disease and spread rapidly if they are not well controlled. Measures to prevent citrus huanglongbing:

The transformation of sick orchards (isolated planting) and the transformation of old orchards must also be carried out in a unified manner in order to effectively clean up the source of disease; planting disease-free seedlings; Insist on the prevention and control of psyllids. The control of citrus psyllids is perennial, and it is necessary to master several key periods: the winter garden clearing period, the early spring bud germination stage, the summer shoot germination period and the autumn shoot germination period, and the second autumn shoot budding stage.

The winter garden clearing is a critical period of the year for the prevention and control of psyllids. The second is the initial stage of new shoots, and each time the sprout stage, the spraying agent needs at least twice, the first spray is about 1 grain long (about 5 mm) in the bud first emergence, and the second spray is sprayed 7-10 days apart. The prevention and control experience of banana oranges in Puning City, Guangdong Province believes that the prevention and control of citrus psyllids should be sprayed three times at a time, and pesticides must be used, and biological control must not be pinned on the prevention and control of huanglongbing; Thorough excavation of diseased plants; Strengthen cultivation management.

The transformation of the sick garden is to remove all the citrus in the sick and old parks, leave no residues, and replant them.

Prevention first, to prevent and control citrus psyllids, it is recommended that you can search the Chinese grapefruit network.