The man was bitten by a red fire ant!What are the harmful creatures invading Guangdong?How to prevent control?

Text/Yangcheng Evening News reporter Chen Liang Correspondent Wang Lei Photo/Interviewee Confer

On August 24, according to media reports, a man in Jieyang, Guangdong was bitten by a red fire ant in the grass, and then fell to the ground. Fortunately, he was discharged from the hospital because of the timely medical treatment, and the relevant local departments also killed the location. The red fire ant is a foreign invasion species. After the crocodile, the news has once again attracted the high attention of 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, a reporter from Yangcheng Evening News interviewed Lu Yongyue, a professor at the School of Botanical Protection of South China Agricultural University.

The speed of invasion of pests in Guangdong is 30 to 50 times before reform and opening up

Yangcheng Evening News · Yangcheng School: 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 had invaded my country found that the main propagation methods of foreign invasion species include intentional introduction (47%), inadvertent 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.

Red Fire Ant Marriage

Yangcheng Evening News · Yangcheng School: What are the main mains of foreign invasion species 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 2 to 3 times the 20 years after the reform and opening up in the 20th century, showing a significant acceleration trend.

If you are bitten by the red fire ant, you can die if you do not send it to the hospital

Yangcheng Evening News · Yangcheng School: What damage and influence will foreign invasion insects 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 phenomenon 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. For example, the seed bee can be eaten, which seriously affects the quality and yield of pasture seeds.

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 the host tree.

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, which drives and kills other limb animals, small mammals, etc. 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.

Red Fire Ant Workers and Reproductive Aims

Yangcheng Evening News · Yangcheng School: 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. It not only affects the health of the people, but also causes misunderstandings because of the need to treat, but also increases the economic burden of the masses.

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., 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. Symptoms after being bruised by red fire ants

Yangcheng Evening News · Yangcheng School: How should we avoid bite such as 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 water shoes and apply talc powder, it is best to wear glue gloves to protect your hands.

Red fire ant nest

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. Pay attention to keep the wound clean, try to avoid the wound from continuing to be infected. If you feel any discomfort, you should seek medical treatment in time.

The Hua Nong team provides strong scientific and technological support for my country's prevention and control of foreign pests

Yangcheng Evening News · Yangcheng School: What are the current methods to effectively treat 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.

Professor Lu Yongyue (first from left) is checking the prevention and control effect of the red fire ant pharmacy

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 · Yangcheng School: On August 24th, the fruit corn fields in Shangqiu City, Henan Province found that there were grassy moth larvae in grassland, 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.

Grassland greedy night moths harm corn

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 · Yangcheng School: In the past two years, you have done experimental research on grasshopper greedy moths. What new progress has been made in the past 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.

Grassland greedy night moth male adult adult

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.

Source | Yangcheng Evening News · Yangcheng School

Responsible editor | Yang Chuyi

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