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The invasion of American pests and the rampant infestation of Lepidoptera litura in China are worryi

As we all know, pests will do great harm to crops. Locusts in China are one of the most typical pests. However, it is reported recently that alien pests from America are invading China. What should we do if American pests invade China? What will be the impact of American pests invading China?

American pests invade China

Recently, a kind of insect pest, Lepidoptera litura, has invaded China. Since January this year, Lepidoptera litura has been found in 67 counties of three provinces from Yunnan, Guangxi to Guangdong. In response to this situation, the Ministry of agriculture and rural areas issued a circular today, requiring local agricultural and rural departments to strengthen monitoring and early warning, implement the territorial prevention and control responsibility, do a good job in prevention and control, and strive to achieve the goal of "insect population seizing grain" to ensure a good harvest.

According to the special column on the occurrence and control of diseases and insect pests issued by the agriculture and rural Department of Fujian Province, the grasshopper armyworm, also known as autumn armyworm, has miscellaneous food habits, strong reproductive capacity, and rapid migration and spread. It originated in tropical and subtropical regions of America and widely distributed in the American continent. It is an important pest endangering local agriculture. Corn, rice, wheat, barley, sorghum and other agricultural crops are the main damage objects. Among them, the yield of maize can be reduced by 10% - 25% when it is damaged in seedling stage, and it can cause seed destruction and no harvest when it is seriously damaged in field. At the beginning of 2016, Lepidoptera litura was found to invade western Africa for the first time and caused a disaster. In 2018, the economic loss in Africa was as high as 1-3 billion US dollars, and the corn seed destruction area accounted for 5% - 6% of the total sown area. In July 2018, the moth was introduced to Asia for the first time.

Since the invasion of Lepidoptera litura was first found in Jiangcheng County of Pu'er City in Yunnan Province in January this year, six cities in Yunnan Province have been damaged in just one month. Up to now, according to statistics, Lepidoptera litura has been found in 67 counties (districts, cities) of Yunnan, Guangdong, Guangxi and other three provinces (autonomous regions), with an occurrence area of about 70000 Mu and a control area of more than 100000 mu. The control effect is good and the overall occurrence situation is stable

For this kind of insect disaster, as long as the prevention and control is proper, the safety of crops and farmland can be protected. I hope that the hard work of farmers will not be wasted because of these insects.

At the beginning of 2016, Lepidoptera litura was found to invade western Africa for the first time and caused a disaster. In 2018, the economic loss in Africa was as high as 1-3 billion US dollars, and the corn seed destruction area accounted for 5% - 6% of the total sown area. In July 2018, the moth was introduced to Asia for the first time. It is reported that since January this year, China's Yunnan Province first discovered the invasion of Lepidoptera Lepidoptera in Jiangcheng County, Puer City, six cities in Yunnan Province have suffered damage in just one month. Up to now, according to statistics, Lepidoptera litura has been found in 67 counties (districts, cities) of Yunnan, Guangdong, Guangxi and other three provinces (autonomous regions), with an occurrence area of about 70000 Mu and a control area of more than 100000 mu. The control effect is good and the overall occurrence situation is stable. In order to prevent the invasion of Spodoptera litura, the Ministry of agriculture and rural areas made plans in advance to prevent its spread.

One is to prevent in advance to ensure the monitoring and early warning in place. In December 2018, a notice was issued to timely organize technicians from all over the country to intensify monitoring and early warning, set up key monitoring points in Yunnan, Guangxi and other border provinces (regions), set up high-altitude warning lights and black light lights, and carry out lamp induced adult monitoring system, striving to achieve early detection, early report and early warning. The second is to organize carefully to control the spread of Lepidoptera litura. Experts were organized to study and formulate the "survey methods for the prediction of Lepidoptera litura" and the "technical plan for the prevention and control of Lepidoptera litura in 2019" to determine the prevention and control strategies such as ecological control, physical and chemical control, emergency prevention and control, regional joint prevention and control, and unified prevention and control. Local agricultural and rural departments use disaster relief funds to purchase prevention and control materials and equipment, guide farmers to choose pesticides to carry out emergency prevention and control, and spare no effort to organize prevention and control work.