How much is the news that red fire ants bite people in Guangdong?How to prevent it?

Red fire ant

Text/Yangcheng Evening News all -media reporter Chen Liang correspondent Wang Lei Wang Lei

Photo/Interviewee provided

On August 24, according to media reports, a man in Jieyang was bitten by a red fire ant in the grass, and then fell to the ground. Fortunately, the man was discharged from the hospital in a timely manner, and the relevant local departments also killed the location. Red fire ants are foreign invasive species. After crocodile, this news once again aroused high attention from netizens to related topics.

How does the red fire ant enter China? How should we avoid being bitten outdoors outdoors? What if I was bitten? What are the harmful creatures invading Guangdong? How to prevent and control? To this end, the reporter interviewed Lu Yongyue, a professor at the School of Botanical Protection of South China Agricultural University.

In the past 20 years, Guangdong pest invasion speed has increased

Yangcheng Evening News: In what way does insects such as red fire ants and grassy night moths enter our country? Which environments are prone to foreign invasion species?

Lu Yongyue: Analysis of the introduction path of foreign invasion species that has invaded our country found that the main propagation methods of foreign invasion species include intentional introduction (47%), unintentional introduction (51%), and natural diffusion (2%). According to our analysis, the red fire ants inadvertently entered our country through trade, and grassland greedy night moths have a strong ability to relocate and enter our country through natural diffusion.

From the perspective of transmission, the diffusion of foreign invasion species is mainly closely related to human activities. With the increasingly frequent international personnel and material exchanges, some species are interested or unintentionally harmed into China. Therefore, the main or first discovery environment of these species is basically in environments where the artificial interference is relatively large and the ecosystems are relatively simple, such as village residences, farmland, and green belts.

Grassland greedy night moth male adult adult

Yangcheng Evening News: What are the main species that have appeared in Guangdong in recent years?

Lu Yongyue: According to statistics, since 2000, a total of 60 kinds of foreign invasive species have been found in mainland China and Taiwan, including 40 kinds of pests, 7 types of animals and plant viruses (pathogens), 1 plant nematode, 2 plants, 6 kinds of aquatic livelihood Algae, 3 fish and one lizard, an average of 3.3 species per year. According to survey statistics in 2017, there are 667 existing foreign invasion species in my country. Among them, more than 40%of foreign invasive species can be found in Guangdong.

In the 21st century, harmful creatures such as new plants, animals, and microorganisms invaded in Guangdong have continued to appear, and the frequency has increased significantly. Take the invasion of pests as an example. In 2000, Shenzhen found the coconut heart leaf armor, the south sea of ​​the South China Sea was discovered in 2001. In 2002, the brown sugar cane elephant was discovered in Guangzhou. Three -leaf spots and new pineapple powder were discovered in Zhanjiang. In 2008, Guangzhou discovered in Guangzhou, cotton pink, eucalyptus branches, juji bees. In the year, Shantou found a small fire ant. At present, the speed of invasion of pests in Guangdong is 30 to 50 times before the reform and opening up, and it is two to 3 times the 20 years after the reform and opening up of the last century, showing a significant acceleration trend.

Bite by red fire ants should be treated in time

Yangcheng Evening News: What damage and influence of foreign invasion insects will bring to the ecological environment and agricultural economy?

Lu Yongyue: The harm of foreign invasion insects is many aspects, including ecosystems, agricultural and forestry production, human health, and ecosystems, species and genetic diversity of the invasion.

The first is the harm to the planting industry. Many foreign invasive creatures are harmful creatures in farmland and orchards. Crops are food or competitive nutrients, sunlight, and moisture with crops. For example, rice pivot armor can cause output loss of 5%-10%, and a few plots are basically harvested.

The second is the harm to animal husbandry. Some foreign invasion of species and pastoral grass competition may directly endanger livestock.

The third is the harm to forestry. Pine tree bees can not only seriously endanger the trees, but also cooperate with the symbiotic fungi to jointly harm the host, resulting in weakening or even death of host trees.

The fourth is the harm to the landscape. For example, pests such as coconut heart leaf armor, American white moth, and cane flat moth seriously harm garden plants and cause harm to the landscape.

Fifth, it affects the ecosystem. The place where the red fire ant invades, it is a single dominant species, driving and killing other limb animals and small mammals. For example, the types and quantities of local ants have decreased by more than 30%, which has a serious negative impact on the ecological stability and biodiversity of the invasive land.

Yangcheng Evening News: What are the consequences of being bitten by a red fire ant?

Lu Yongyue: The harm of human health is one of the important impacts of foreign invasion insects. The red fire ant's bonding lights are pus, and severe allergic reactions occur, such as shock, and even death.

If a person is bruised by a red fire ant, he usually has mild symptoms, namely erythema, pimples, blisters, pustules, itching, pain, wind groups, etc. A few will have severe symptoms: allergic reactions, such as systemic itching, urtication, urtication Measles, redness and swelling of the face, dyspnea, chest pain, accelerated heartbeat, etc., as well as fever, dizziness, and even shock. Extreme cases will die, but the proportion is extremely low, which is generally caused by not being sent to the hospital in a timely manner.

Yangcheng Evening News: How should we avoid biting bite by red fire ants outdoors? If you are bitten, what to deal with the first time?

Lu Yongyue: During the outdoor activities, in addition to doing good protection, we must also prevent insect bite. Generally, be careful when protecting the protection, spraying driving agent, and activities. Take the prevention of red fire ants as an example. The best way is to stay away from the ant hills. Do not stay in the red fire ant activity area for a long time. The ant hills that are suspected of red fire ants (soil piles above the ground) are found, do not disturb the damage. If you need to stay, you should take individual protection. If you put on long tube water shoes and apply talc powder, it is best to bring glue gloves to protect your hands. If you accidentally be diluted by the red fire ant, you must first use soapy water or water to rinse the wound in time, and the pain can be reduced with cold compresses; outer coating steroid drugs or cool oil, double flying human oil, etc. to relieve itching. If you feel any discomfort, you should seek medical treatment in time.

Professor Lu Yongyue (left) guidance and prevention and control work in the field

Prevention and control of foreign pests must be supported by science and technology

Yangcheng Evening News: What are the current methods of effectively governing red fire ants? What research and work did you and the team do in this regard?

Lu Yongyue: Our team took the lead in organizing the research of emergency prevention and control of red fire ants. After 18 years of science and technology research, it has made a series of significant progress in the ant biology, ecology, monitoring, quarantine, prevention theory and technology of the ants. These technical systems have been implemented in a large scale, providing strong scientific and technological support for my country's prevention and control of red fire ants.

The first is to build a scientific and accurate monitoring technology system. We have designed a new device for breeding of red fire ants, created 5 new equipment and new methods, screening out three well -effective bait and placement methods, and proposed the monitoring, survey methods, and methods of red fire ants. It is clear that the five bait in various habitats on the red fire ants, and the monitoring accuracy rate is more than 98%.

The second is to develop high -efficiency and practical red fire ant detection methods to screen chemical removal techniques, heat treatment technology, and fumigation removal techniques for flowers, seedlings, grass fields, logs, and waste paper for flowers, seedlings, grass fields, logs, and waste paper.

The third is to screen a touch -killing agent with good prevention and treatment effects, which clarifies the 18 kinds of insecticides to the 4 -year -old larvae to kill the poison, 17 pesticides on the active anticulsion of the workers, the instantaneous contact of the 11 pesticides, and the effect of conducting the poisoning killing effect And driving the role. The scientific indicators of evaluating the effect of evaluating the prevention and control of the pharmaceutical agent are established, the pharmaceutical agent that conducts good toxicity for red fire ants, and develops multiple efficient bait and powder, and is widely used in control.

Yangcheng Evening News: On August 24th, the fruit corn fields in Shangqiu City, Henan Province found that there were grassy moths in grassland moths, and the damage of the corn field was 50 acres. What kind of prevention and control do we take for the pest?

Lu Yongyue: The overall prevention and control thinking of grassland greedy moths In accordance with the requirements of "early planning, early warning, early preparation, early prevention, early prevention", adhere to prevention, comprehensive control, comprehensive monitoring, emergency prevention, control, joint prevention and joint control. In the prevention and control strategy, a partitional governance strategy is implemented, the anniversary breeding area is the main offense, controlling the relocation area, protecting the main corn production area, and making every effort to curb the launch of the grassy moths. On the principle of "combining length and symptoms" on the route of prevention and control technology, based on ecological control and agricultural prevention and control, the biological control and physical and chemical control are the focus, chemical prevention and control as the bottom line, and implement "partition governance, joint prevention joint control, comprehensive comprehensive, comprehensive comprehensive Governance "strategy.

Yangcheng Evening News: What new progress has been made in these two years?

Lu Yongyue: As far as our team is concerned, in recent years, the spatial distribution of sweet corn grassy moth eggs, larvae diffusion distance and spatial distribution have been clarified in recent years. The grassland greedy night moth develops, survive, reproduced, and population development on different plants of the cruciferium, and analyzes and determines its adaptability to the plants of the family. Evaluated more than 10 parasitic bees' parasites for grassy moths, screening 4 parasitic superior bee species, filtering the host of suitable parasitic bee breeding; competition research between parasitic bees; analyzing temperature -to -parasitic parasitic The impact of the growth, breeding, and population quality of the bee. We also studied the measurement of the predation capacity of the grasshopper greedy moth. The above research provides theoretical and technical support for the prevention and control of grasshoppers.

We have also carried out system monitoring and physics, biological, and chemical prevention technology research on grassy night moths for three consecutive years. In response to the characteristics of Guangdong fresh corn production practices, combined with literature, materials and agricultural operation experience, we have integrated Guangdong fresh corn grassland greedy night The green prevention and control technology system of the moth provides a basis and reference for the green prevention and control technology of the corn grassy moth in Guangdong.

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