What is the impact of alien pests invading China? Central Document No. 1 was named

What is the impact of alien pests invading China? Central Document No. 1 was named

Sino-Singapore Jingwei Client, March 7th (Song Yafen) Recently, an agricultural pest called "Spodoptera litura" attracted attention. It not only hit the hot search, but also brought the pesticide stocks on fire.

It is reported that Spodoptera frugiperda has also been named by the No. 1 document of the Central Government. The Ministry of Agriculture and Rural Affairs recently issued a series of notices requiring prevention and control. So how harmful is this pest? Why can I be named by Document No. 1? Can it be effectively prevented?

What is the name of the Spodoptera litura that File No. 1 pays attention to?

Most people may be unfamiliar with the pest Spodoptera frugiperda. According to the data, Spodoptera frugiperda, commonly known as the autumn armyworm, originated in tropical and subtropical regions of the Americas and invaded China for the first time last year. Spodoptera frugiperda is one of the top ten plant pests in the world, and its appetite is huge. An adult can eat fresh leaves close to its own weight in one meal. Once the disaster, it can cause corn production to be reduced by more than 20% -70%. To the absolute harvest. Because it eats fast and accurate, and it moves quickly, Spodoptera frugiperda is also known as the "Autumn March Worm" in the Americas.

Because of its serious harm, this year's Central Document No. 1 clearly called for "grasping and controlling major pests and diseases such as Spodoptera frugiperda".

It is understood that Spodoptera frugiperda larvae can eat a large number of grasses such as rice, sugarcane, and corn, as well as various crops such as Asteraceae and Cruciferae. Professor Zhang Zhixiang from the School of Agriculture of South China Agricultural University told the client of Sino-Singapore Jingwei: "Maize has a great impact on the food security of our country. It is sufficient to prevent and control other crops by 80 or 90 percent. The loss of 10 percent is acceptable, but corn It accounts for nearly 40% of China's grain output. If 10% is lost, the national grain output will be reduced by 4%, which will have a great impact. "

The National Plan for the Prevention and Control of Spodoptera frugiperda in 2020, issued by the Ministry of Agriculture and Rural Affairs, mentioned that Spodoptera frugiperda has colonized in southern China, and the source of insects from other countries has continued to move in. The situation will be more severe in 2020, and the prevention and control tasks will be even more serious difficult.

Zhang Zhixiang pointed out that this year's situation is definitely more serious than last year, and now it has started in some parts of Guangdong, and it is still more serious. In April, when the wind blows north, the pests in the north will be severe.

Can Spodoptera frugiperda be effectively controlled?

According to the introduction of the Ministry of Agriculture and Rural Affairs, on the basis of summing up the experience of controlling and controlling Spodoptera frugiperda last year, the prevention and control plan has been optimized, and materials for prevention and control have been prepared in advance. At the end of last year, the Ministry of Agriculture and Rural Affairs allocated 50 million yuan for the prevention and control of Spodoptera frugiperda in winter and spring, and recently allocated another 490 million yuan to support the preparation of materials for prevention and control.

So, in terms of technology, can the control of Spodoptera frugiperda be effective? In this regard, Zhang Zhixiang said: "In terms of prevention and control, it can certainly be controlled. Technically effective prevention and control issues are not too big, mainly cost issues."

According to Zhang Zhixiang, there are problems with cost input and benefit recovery. For example, the price of feed corn in the north is relatively cheap, and the profit per mu is about 400 yuan. There is a problem: a few dollars for pesticides once, and dozens of dollars for pesticides 10 times. If the pesticide is applied multiple times, plus labor costs, it is not cost-effective.

"In addition, unlike the traditional loss of traditional concepts, the loss caused by reduced corn production affects national food security, so it is actually a more serious political issue."

Zhang Zhixiang also pointed out that if the drug resistance is to increase in the future, according to the current prevention and control programs and levels in our country, it should be okay to prevent and control it, just to see how much it will cost.

Zheng Yong, chief analyst of CITIC Construction Investment Chemicals, pointed out that due to the relatively large area of ​​corn planted in northern China, Heilongjiang ’s output accounted for more than 15.5%, and Henan ’s share reached 9.1%; the current stock-to-consumption ratio of corn has fallen for four consecutive years At 40%, Spodoptera frugiperda invading China is a subtype of corn. Therefore, if Spodoptera frugiperda erupts north of the Yangtze River, it is bound to cause Chinese corn prices to continue to rise. (Zhongxin Jingwei APP)

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