A nationwide outbreak. That winter, my bee farm was infected when picking flowers in Yueyang.
There were more than 500 wasps in the spleen, and cystic disease broke out the following spring.
More than 20 bees escaped in groups. There was no cure at that time, and the bees were in trouble.
There's not much left. After that, many Chinese herbal medicines can only play a control role.
Can't solve the fundamental problem, and finally the bee colony is getting weaker and weaker.
No specific medicine was found. I think the bursal disease of bees in China is very serious.
There is no extinction, which is due to the survival law of nature. China bees
Infection with cystic diseases is inevitable, so I naturally eliminated students for many years.
Take the deposit law as the criterion, and further control it through manual management. Received.
The effect is good, and the cyst disease is reduced to the minimum. Now my side
The method is introduced as follows.
Taking Hunan as an example, the peak of cystic diseases is in early spring, but in spring.
Divided into centers and extended to the end of Xiaoman. Late autumn extends from the autumnal equinox to the center.
Stop production after wintering.
Any living thing has its genetic characteristics. Table of Genetic Characteristics of Bees in China
Now it's disease resistance, spawning ability, aggregation ability, spleen strengthening ability, cold and heat resistance,
Temperament and other performance advantages and disadvantages. Even if a person has two kinds of cystic diseases.
The offspring of the queen bee without a high incidence history can only reach the female parent.
80% disease resistance, 20% offspring, even if they are not sick at ordinary times,
However, in early spring or late autumn, you will also develop cystic diseases at a high incidence. Because of this place.
The queen copulates in the air, and the man cannot control his father's choice, so
Seed selection should not only choose the female parent, but also pay attention to prevent long-term easy.
The emergence of infected swarms of drones. So we have to number each spawning king under the stage.
Make long-term records, and once the disease occurs, it will be controlled in an orderly manner.
Cystic diseases in the system.
The first batch of seeds produced in early spring were selected from 2~3 groups, after 2.
Take the female parent population with no history of cystic disease at the high incidence stage and adjust the population potential to make it
It is required to ensure that at the vernal equinox, that is, at
There should be a large number of mature queen platforms in the high incidence of cystic diseases. Males who divide bees in advance
Bees are much healthier than ordinary drones, which can be improved to some extent.
Seed selection efficiency.
The spawning king cut off one wing, the other wing and the other.
Feet, cut off one wing of the spawning king to prevent the worker bees from flying away due to illness.
The reason why the sick king is disabled is because the sick king is still valuable: first,
Can stabilize worker bees' mood and prevent worker bees from laying eggs. Second,
After the introduction of the queen's platform, the queen will not kill the remnant king, and she will pay for it.
After the tail is successful, remove the sick king. This method is based on summer and autumn.
The mother and daughter of the seasonal spawning king failed to spawn, so naturally they alternated with the queen's platform.
From the principle of nesting. My method can make it in early spring and summer and autumn.
Mother and daughter nest together to achieve the purpose of treating diseases.
Introduce the Wangtai method: the remnant king disease group is like a few bees, and put it on the Wangtai.
On the upper beam of the nest frame. If the number of bees is insufficient, in order to prevent the queen platform from freezing, you can
Put it in the center of the second spleen near the fossa. In the second nest spleen
And a wooden partition is placed between the third nest and the spleen, and the third nest and the spleen are here.
It is the king who lays eggs, so that he will never climb over the partition to bite people.
After the introduction of the queen, the partition was pulled out, thus forming the mother platform.
Female * * *. Once the new king has successfully mated, the sick king will be removed immediately.
What if there is no natural queen platform after the bee season?
I don't think we should rush to build a throne. We should choose one after the vernal equinox.
Good spawning ability and collection ability.
The queen bee artificially disabled it, forcing it to immediately build an alternate platform and use it.
Introduce Taiwan Province to the sick group, treat the disease according to the above methods, and replace other Lao Wang.
Generally, the stronger the spawning ability of Lao Wang, the shorter the nesting period of mother and daughter. Lao Wang lays eggs
The worse the stress, the longer the nesting period. This method appears in summer and autumn.
A large number of mother-daughter nests with strong disease resistance were found in early spring.
Individual new kings should be killed immediately if they are sick, and the quality mother should be killed immediately.
Lesbianwo group suggested introducing Lao Wang to the group of patients, and then pressing the button above.
Methods Wang Tai was introduced to make Lao Wang's mother and daughter nest twice. Such cycle
Yes, it can not only keep the disease resistance of the whole bee colony at a high level, but also
Make the queen bee reach a better state in quantity.
A disease group with the idea of flying away refers to a bee group with 50% rotten eggs, and
And the queen bee's abdomen contracts or flies away: kill.
The sick queen must not introduce the spawning king or queen platform separately. If it is introduced,
Go, the bees still fly away, and the rotten spleen of the sick group must be taken first.
Take it out, leaving only two empty spleens, and then kill the sick king, the next night.
Introducing a healthy queen bee and a healthy spleen can effectively kill bees.
The flying concept of the group.
After the flowering period of Rhus sumac is over in June 5438+ 10 every year, wild chrysanthemum and Tilia amurensis bloom.
During the period before flowering, a batch of nectar and camellia oleifera honey will enter the winter.
Be sure to shake it out before and replace it with high-quality sugar as wintering feed.
This can improve the disease resistance of bees in the coming spring to a certain extent.
Force is conducive to spring reproduction.
In addition to reducing the fever of bee colony distribution in early spring, it should be maintained all year round.
Bees have more spleen and less, so leave enough honey powder, which will
Greatly improve the disease resistance of bee colonies.
I have done many experiments: in the high incidence of cystic disease, I will put one.
50% of rotten spleen was put into the group with two high incidence stages of cystic disease.
In the group with medical history, the first batch of eggs laid by the spleen only rotted after the worker bees cleaned the nest.
After a few pills, the second batch will be fine, indicating a variety with strong disease resistance.
Sex has this advantage. It doesn't need to change boxes and spleen, and it doesn't need to stop.
Clear the nest, do not rely on any drugs. I have a friend who will get sick in the bursa of fabricius.
Putting the spleen into the Italian hive is intended to help bees clean up their nests, which is perfect.
In addition, I have done the second experiment many times: a group of strong people are sick and rotten.
Up to 50%, its nest spleen is full of good new spleen, I killed the sick queen,
Immediately introduce an old Wang Jin who has passed two peak periods of China's bursal disease and has no medical history.
Go, the first batch produced by Lao Wang, the rotten son does not exceed 10%, and the second batch.
The baby will be cured. I did the third experiment many times: I succeeded at the same time.
A pair of king boxes of Xinxin Merlot Co., Ltd., although healthy, gave birth to two batches of children, with a rotten rate.
50% at most, simple to handle, kill the sick king, and remove the partition to get rid of the disease.
The above three experiments show that the good new spleen in the sick group should not be easily destroyed.
So as not to cause economic losses.
Personally, I think it lies in whether bees have bursal disease and the severity of the disease.
It all depends on the queen bee's disease resistance.
Experience in prevention and treatment of wasp larva disease in China
He Xianglin
Bee Magazine (Monthly)No. 1 2008 1 month
Chinese bee larva disease is an infectious disease caused by cyst larva virus.
This disease is highly contagious and often leads to a large number of death of bee larvae.
Death seriously threatens the development of Chinese bees and brings huge losses to beekeeping production.
Cystic larval diseases of lost bees and China bees have been widely prevalent in China since the early 1970s.
Since the outbreak, the disease has still occurred. As far as we know, there are many bees.
According to the observation in, this disease is one of the most harmful bee viral infectious diseases in China. for
To raise Chinese bees well, we must seriously prevent and control this disease, and we have adopted a comprehensive approach.
The control measures have achieved good results. Explain that measures should be taken as long as the methods are proper.
Correct and powerful application can control and extinguish the occurrence and epidemic of the disease.
Therefore, we will use the method of combining traditional Chinese medicine to prevent and control the Chinese bee larva disease.
Some experiences and understandings are reported as follows:
Pathogen and epidemiological status of 1
Cystic larva disease is a kind of honeybee cystic larva virus in China.
Holmes), this virus is highly contagious, 1 case.
The virus contained in the dead larvae of cystic larva disease can make 3000.
More than 100% larvae were infected. The temperature and time of detoxification after the disease leaves the living body
In hot water at 59℃ 10min, dry in direct sunlight.
The virus can survive for 4 ~ 6 hours, and the virus is suspended in honey at room temperature.
Can survive 1 month.
This disease can occur all year round, and it is often prevalent in our region from March to May.
As far as population potential is concerned, both strong and weak groups may be infected. but
The resistance of different varieties and bee colonies to the disease is significant.
Difference. So the severity of each group is different. The spread of the disease in bee colonies.
Sowing is mainly through mutual collection of bees or stealing bees in bee farms.
Bees bring viruses to healthy bees. This virus can be found in worker bees.
Proliferation is asymptomatic, but it can pollute feed such as honey powder and feed young.
Insect activities make the larvae infect and spread or artificially infect the spleen and spleen of the disease group.
Honey and spleen were transferred to the healthy group.
Two symptoms
1 ~ 2-day-old larvae mostly died in May to June after the disease, and the death in the enclosure was about 1/3.
Before and after covering, two-thirds died, and the exudate on the body surface of newly infected larvae was healthier than that of infected larvae.
There are many larvae, and the flowing subcutaneous exudate can be seen under the magnifying glass. Besides,
There's not much difference outside. With the development of the disease, the head of the larva leaves the nest.
The wall, upturned, looks like a dragon boat and is called "hook larva". At this time, the larva's
The body color also changed from pale to light brown, and there was more exudation under the skin. Use tweezers.
When it came out, it showed cystic larva disease. Finally, the larvae gradually dry up and break away.
The empty room left by the bee pupa after being dragged out of the nest makes the whole spleen flower step-like and stereotyped.
Variegated spleen. Because bees can't get enough young bees to make up for their appearance
Filling, so the potential of the bee colony drops quickly, and the bee colony withers and declines. If not,
Timely treatment may lead to the extinction of the whole bee colony or the danger of bees flying away.
3 prevention and control methods
Cystic larval disease spreads quickly and does great harm, so we should focus on prevention.
Mainly. First of all, we must implement a strict quarantine system. For places where there is no disease,
These areas should be strictly protected to prevent the introduction of pathogens. For the affected areas,
Measures should be taken in time for isolation treatment.
3. 1 Strengthen feeding management
In early spring and late autumn, the outside temperature is low, so we should pay attention to the warmth and regulation of bees.
The relationship between bee and spleen in bee colony makes the number of bees slightly more than that of nest spleen or keeps the proportion of bee and spleen.
Make bees dense and reduce the number of unpacking inspections. Too weak bees can carry it.
This combination is beneficial to heat preservation. When the bee colony is short of feed, it should be replenished in time.
Feeding to ensure the normal life needs of bees. During the period of bees' mass reproduction
Occasionally, some nutrients, such as pollen and vitamins, should be added to enhance the resistance of bees to diseases.
Disease resistance.
3.2 Strict disinfection measures
When changing boxes, 1% ~ 2% sodium hydroxide water can be used for beehives and nest frames.
The solution can be cleaned and disinfected, and infected bees can also be disinfected with boiling water.
Take out the nest spleen, take out the dead worms and pupae with tweezers, and then use 2%.
Wipe the bird's nest with iodine, and then use 75% alcohol to remove iodine. Spleen deficiency pollen
Closed fumigation and disinfection with glacial acetic acid vapor, the method is to frame the nest spleen in a box.
Spread 1 layer of toilet paper, and then drop glacial acetic acid on the toilet paper. Each TEU
Fumigating with 80ml glacial acetic acid for 48 hours, and waiting for glacial acetic acid steam after unsealing.
You can apply it when you use it.
3.3 circuit breaker
Cover the spleen of the mother bee with an iron gauze mask, forcing the mother bee to stop laying eggs for 7 ~.
10d, the seeds are broken in a period of time, which reduces the chance of repeated infection by germs.
3.4 Cultivate disease-resistant bee species
This is a more successful way, that is, to choose disease-free groups or sick bees.
As a breeding colony, bees breed queens and drones to resist the diseases of their offspring.
Ability observation, and select the strong disease resistance as the species group, eliminate that one.
Change some weak resistance queen bees into strong resistance queen bees, and after the system,
Breeding will alleviate the disease and reduce the recurrence of the disease. According to observation,
After comprehensive treatment, our once sick bees gained disease resistance.
Force, in the process of the second epidemic of the disease, no longer onset.
3.5 drug therapy
Prescription: 20 grams of tortoise, 6 grams of licorice, 6 grams of giant knotweed, and 5 to 5 tablets of multivitamins.
10 tablets. Usage: soak the medicinal cold boiled water for 30 minutes, and then boil it with strong fire.
Then decoct with slow fire for 5min, filter out the liquid medicine, decoct for 1 time, and combine the filtrates.
Adding white sugar according to the ratio of1:1to make sugar paddle, and then adding finely ground multi-dimensional powder,
Stir well and feed the bees. Every 1 dose can feed 10 ~ 15 boxes of bees, every other day 1 time, 4 ~ times in a row.
Five times. After our observation on the treatment of infected bees, after two courses of treatment, matching.
Combined with the above comprehensive measures, the development of the disease can be controlled.
4 discussion and results
Mountain turtles use tuberous roots as medicine; Function of nature and taste: bitter and cool; Clearing away heat and toxic materials,
Removing blood stasis and relieving pain. Polygonum cuspidatum is a Polygonum plant of Polygonaceae, and its roots are used as medicine. Sexual taste function:
Bitter, sour and cool, clearing heat and promoting diuresis, relaxing bowels and detoxicating, removing blood stasis and promoting blood circulation. This medicine is good for seeds.
Bacteria, such as Staphylococcus aureus, Streptococcus, Escherichia coli, Pseudomonas aeruginosa and so on.
It has inhibitory effect. Licorice is sweet and flat, and has the function of clearing away heat and toxic materials.
DD family all know that vitamin supplements can enhance the infection of bees.
Resistance to disease. Through the treatment of integrated traditional Chinese and western medicine, 10 bees were infected.
All cured. However, several groups of infected bees did not take preventive measures.
If you give, the whole group will perish.
The combination of traditional Chinese and western medicine has a good effect on the prevention and treatment of Chinese bee larva disease
Zou guohong
Agricultural Science and Technology InformationNo. 1 1 2007
Bee cystic larva disease is also called cystic larva disease and cystic bee disease. Zaiyang
Bee production happens from time to time, and nearly 100 larvae die when the condition is mild.
Death, worker bee collection activities are normal; When the disease is serious, bees only see larvae.
The number of adult bees increased but did not increase, resulting in a large number of larval deaths, and worker bees showed
Uneasy, the collection power is obviously reduced, and even the whole group flies away, causing bee farmers.
The loss is serious.
1 pathogen
It was found that the pathogen of honeybee cystic larva disease was cystic larva.
Disease virus, which mainly infects larvae and causes their death. Usually in
1~2-day-old larvae invade and emerge in 5~6-day-old larvae.
These obvious symptoms can also spread in adult bees, but they will not show symptoms.
Shape. Cystic larval disease virus has weak resistance to unfavorable external environment,
It can only survive in hot water at 59℃ 10 minute, but it can be dried at room temperature.
In order to survive for 3 weeks, the corpse of pests and diseases can survive 1 month, if it is sick.
Insect carcasses can only live for 7~ 10 days. According to reports, in bee bread.
The virus can live for 100~ 120 days and remain on the nest wall in summer.
It can survive for 80~90 days and 90~ 100 days in winter. Sunshine zhi
Shooting for 4~7 hours can kill you.
Two symptoms
Most infected larvae died within 6 days, 30% died before sealing and 70% died.
Died after sealing. Hanako appears in the early stage of the disease, and then it can be found in the spleen.
A "tip" appears on the surface, and the head of the larva tilts away from the nest wall, forming
Hook-shaped larva whose body color changes from pearl white to yellow, then to brown and dark brown. take out
After eclosion, the insect body presents a typical pouch shape. The lid sealing the pest house sinks,
Worker bees bite a hole in the roof or pull it out of the nest; Didn't get dragged out
Dead larva, the body color changes from light brown to dark brown or black, and the later stage is one
Dry films, such as dragon boats. Dead insects do not become warped, odorless and sticky after drying.
Easy to clean.
3. Pathogenic law and route of transmission
3. 1 law of incidence
3. 1. 1 The occurrence of honeybee cystic larva disease is related to climate.
The climate changes greatly, the temperature and humidity are unstable, and the bee colony is in the breeding period.
Easy to get sick. For example, in the south of China, there are two cases of Chinese bee cystic larva disease every year.
The peak incidence occurred in March and April in Guangdong and Fujian, and11-65438+February in Jiangxi.
Hunan appeared in April-May and10 ~11; The onset in the north is late and general.
Appears from May to June. In summer, the condition gradually eased, and the strong bee became sick.
Love can heal itself, but it will recur in autumn or the next spring.
3. 1.2 The occurrence of honeybee cystic larva disease is also related to the honey source and honey storage in the nest.
The shortage of honey sources in early spring is related to the density of bees, especially bees.
There is a lack of honey storage in the colony, and larvae are prone to be hairy when they lack protein feed.
Sick, and the condition is serious; On the contrary, when the external honey source is abundant, honey is stored in the nest.
Pollen is abundant, and the number of bees is dense (bee spleen is commensurate or there are many bees)
Spleen), the disease is mild and easy to recover.
3. 1.3 Bee cyst larval disease is also related to bee species.
The disease resistance varies greatly, and the disease resistance of western bees is better than that of oriental bees.
Strong, even in the same species of oriental bees, but also have disease resistance
Same population.
3.2 Transmission route
Studies have found dead larvae and contaminated feed in bee colonies.
Feed (honey and pollen), nest spleen and bee tools are the main diseases of cystic larvae.
The source of infection, and the worker bees with poison in the sick bee colony are the disseminators of pathogens.
Worker bees are infected and infected when cleaning up dead larvae, and they are feeding larvae.
When insects are infected, the virus can infect healthy larvae and make them sick. practising certificate
Ming, cystic larva disease virus invades through the digestive tract, but through adulthood.
It is spread when worker bees feed and clean their nests. The disease spreads among bees.
The spread of the virus is through mutual contact in bee collection activities.
For healthy bees, in addition, there are bees and nests on the bee farm.
Human activities such as mutual mobilization can also spread.
Four diagnostic methods
4. 1 observation outside the box
When bees go out to pick, they can see it from the nest box.
Drag out dead larvae; Scattered deaths can also be observed in front of the hive.
Larvae, suspected to be this disease.
4.2 bee colony inspection method
Open the hive, take out the lid of the spleen, and find a lot of different lids on the nest.
Ordinary holes or worker bees have opened them, exposing the upturned heads of sick larvae.
Department, pick out the pests and diseases, it can be seen that there are obvious sacs at the end of the insect, and the insect surface is pale.
White, tasteless, non-sticky, can be initially diagnosed as this disease.
4.3 Sample inspection method
(1) send into bee specimens. This is desirable for bee colonies suffering from adult bee diseases.
Bees with typical symptoms in the nest spleen or the bottom of the hive and bees in the
There are 20 to 30 dying bees and dead bees crawling in front of the hive. fix
Put it in a small paper bag, record and mark it, and then put the specimen in Xiao Mu.
Put the mail in the box, and be careful not to soak it in alcohol.
② Send larval specimens. Cut a small piece of pest or dead first.
The wormhole and spleen were sent in a small wooden box. Second, choose a larva.
Some are just put into sterilized small glass tubes, sealed and sent out. be filled/suffused/brimming with
Meaning, all specimens used for microbiological examination can't be added with any preservatives.
Agent, also can't use chemical methods to deal with.
5 Prevention and control measures
5. 1, giving priority to prevention
Keep the bee farm clean, 5% bleaching powder solution or
Spray with 10~20% lime milk regularly, at least 1 time in spring and autumn. Dark and damp
Lime powder, bee carcasses and other dirt that need to be cleaned can be directly removed on site.
Burn or bury deeply.
Scrape off the remaining beeswax and propolis in the nest frame and beehive and treat the bees.
Boxes and bees are strictly disinfected.
5.2 Isolation of sick bees
Implement a quarantine system to protect epidemic-free areas and prohibit sick bees from entering.
Fly bees in a mobile way to prevent the spread of pathogens, and do not fly bees in epidemic areas.
It is found that the diseased bee colony should be moved quickly to the distance from the bee farm 1 ~ 2000.
Beyond the meter. First, the spleen of the sick bee colony is tied tightly, and the sick offspring are taken out of the spleen.
Replacing spleen with wax, putting the bee colony and spleen into a sterilized beehive, and administering the medicine.
Biological therapy.
5.3 Strengthen feeding management
It is not complicated to strengthen heat preservation and reduce the range of temperature change in the bee colony.
During the breeding period, you can break the king; Keep enough feed in the population to make the larvae develop normally;
Honey collection should be fast, light and steady, so as to reduce the influence of temperature and humidity on larvae and machines.
Degree of mechanical damage. Pay specific attention to the following aspects.
First, in early spring and late autumn, the outside temperature is low, so we should pay attention to the bee colony.
Heat preservation, rummaging for heat preservation in sunny days, and increasing the temperature of the bee colony. decrease
Check the number of bees to avoid affecting the nest temperature. Adjust the bee spleen in the bee colony
Department, so that the number of bees is slightly more than the nest spleen or keep the bee spleen commensurate.
Second, when the feed in the bee colony is insufficient, it should be replenished in time.
So as to ensure the normal life needs of the bee colony, especially during the mass reproduction of the bee colony.
Occasionally, some nutrients, such as pollen and vitamins, should be added to make the bees strong.
Resistance to disease.
Third, lock up the queen bee in the sick group and cut it off temporarily. nesting
Dead larvae on the spleen are removed by worker bees, which reduces the accumulation and interruption of pathogens.
Infection chain, reduce disease.
Fourthly, beehives can be cleaned with 1~2% sodium hydroxide solution.
Poison, empty spleen can be soaked in 4% formaldehyde solution for 24 hours, pollen spleen
Acetic acid vapor can be used for closed fumigation and disinfection. At present, efficient nests are mostly used.
Spleen disinfectant is used to disinfect bee tools. Efficient Nested Spleen Disinfectant is a widely used disinfectant.
Spectral chlorine-containing disinfectant is safe for bees and has high disinfection effect. special
The disinfection method is soaking disinfection, and 100 tablets are dissolved in 2 000 ml.
Soak the nest and spleen in clear water for 20 minutes, then shake out the liquid medicine with a honey shaker, and then
Soak in clear water twice, each time for 5~ 10 minutes, and dry for later use.
5.4 Cultivate disease-resistant varieties
Pick out bees with strong disease resistance from the sick bee farm and cultivate a new king.
When to eliminate the drones in the sick group. The cultured queen bee is used to replace the sick group.
After several generations of reproduction, the cysticercosis of Chinese bees can be reduced.
The incidence of.
5.5 Change the king in time
In view of the two peak periods, change the king at the right time, especially the Chinese bee and the king.
It is the need of production.
The significance of changing kings to suppress diseases lies in: ① the seeds are broken and there is no host in the box,
Cut off the infection cycle and reduce the main sources of infection; ② Toxic worker bees in the body.
No insects breed and are collected out of the nest. Because there are no pests and diseases in the bee colony,
There is no need to remove pests and diseases, and it will not be infected, and it can also feed the next batch of new kings.
Larvae hatched from eggs will not become vectors of infection; ③ Usually, a new bee is born.
Strong vitality, less poison.
5.6 Drug control
The following drugs can be selected to control diseased bees.
50g of Scutellaria barbata hay with a square 1,
Decocting, filtering to obtain filtrate, and adding white sugar according to the ratio of1:1to make medicinal liquid sugar.
Feeding bees with pulp can cure 10~ 15 beehives.
Formula 2: 30g of acanthopanax bark, 0/5g of honeysuckle/kloc-,9g of cassia twig and licorice.
6 grams of grass, decocting, filtering to obtain filtrate, and adding white sugar according to the ratio of1:1.
This syrup can be used to treat bees with 40 frames.
Formula 3: Jin Buhuan (Hainan Gold Exchange) dried root tuber 8- 10g,
Decocting, filtering to obtain filtrate, and adding white sugar according to the ratio of1:1to make medicinal liquid sugar.
Plasma feeding bees can be used to treat 10~ 15 frame bees.
Formula 4: 50 grams of Rhizoma Osmundae, 50 grams of Flos Lonicerae and 25 grams of Radix Glycyrrhizae are decocted in water.
Decocting, filtering to obtain filtrate, and adding white sugar at the ratio of1:1to make liquid medicine syrup.
Breeding bees can be used to treat 10~ 15 frame bees.
Fang 5 antivirus 862 is an antiviral drug amantadine and Chinese herbal medicine.
The curative effect of the mixed preparation on honeybee cystic larva disease can reach 84%
~ more than 87%.
The experiment shows that the application of anti-virus 862 combined with nest spleen disinfection is better.
Comprehensive measures such as changing queen bees can achieve more than 90% control effect. Take 1 bag
Dissolve the drug (4g) in a small amount of water, and then add 2000g 1: 1 sugar.
Water, mix well, feed 4 groups of bees, feed/kloc-0 every 4 days, 5 times in a row.
Occurrence and control of honeybee cystic larva disease
Zhang Jinhui Majunde
Aquaculture Technical Consultant September 2007