Known as the "first dish of spring vegetables", the leek is the love of many northerners, but the frequent occurrence of the "poisonous leek" incident has made many consumers love to eat and dare not eat more. The reason why the quality and safety of leeks is difficult to protect is mainly because it is necessary to deal with the difficult cockroaches. The main pest of this leeks is hidden in the roots of the leeks, and the common pesticides and drug delivery methods are not effective. Things, the use of more and easily lead to excessive pesticide residues, so that farmers are quite a headache.

Nowadays, the Chinese Academy of Agricultural Sciences “Research and Demonstration of Crop Roots Control Technology” has developed a new technology to deal with cockroaches. It can kill cockroaches efficiently and thoroughly without pesticides, and it is easy to operate, low in cost and easy to promote. Not only can we solve the big problem for the vegetable farmers, but consumers can also eat the leek in the future.

1 simple technology to solve big problems

Hualong Town is one of the two major amaranth production areas in Shouguang City, Shandong Province. The local amaranth plant is nearly 7,000 mu, and there are nearly 3,000 amaranth growers. As an old production area with more than 30 years of amaranth planting history, alfalfa has become the most troublesome pest for farmers. Especially in the spring and autumn, growers are busy fighting drugs and fighting.

In the past years, every time I used to fight drugs, Tang Xiaowei, who planted more than 100 mu of leeks, was hired for several days, and this year he no longer has to worry about this. It turned out that at the beginning of May, Dr. Shi Caihua from the Institute of Vegetables and Flowers of the Chinese Academy of Agricultural Sciences found Tang Xiaowei and proposed to test a new technology for controlling cockroaches in his leeks.

“Can you cure the cockroaches without pesticides?” Tang Xiaowei, who was dubious, took a test of 2 points and did not expect the effect to exceed expectations. "Before you picked up a leeks, you can see dozens of cockroaches. After using this method, you can dig out and see that the worms are not moving. It is hard to find them after a month."

Seeing is believing and convincing, Tang Xiaowei applied this technology in 30 mu of leeks. The control effect is good, the leek grows well, the tillers are thick, the rhizome is thick, the leaves are wide green, and the leaves of the control field are yellow. The comparison of amaranth is very obvious.

Seeing Tang Xiaowei's field application effect is good, Zhao Jinbo of the adjacent field also started to act on June 17, using this new technology in his own leeks. The reporter saw at the scene that the original high-temperature laminating method was to cut the leeks over the surface and put a layer of light blue film on the sun for a few hours. The operation was very simple. Zhao Jinbo told reporters that he and his wife could finish an acre of land in an hour or two, and they could uncover the film in the afternoon.

"This is a simple way to look at it and solve the big problem for us!" Zhang Lihuan, director of the Agricultural Comprehensive Service Station of Hualong Town, told reporters that this high-temperature laminating method can make the surface temperature reach 70 °C, underground 5~ The temperature of 7 cm can reach 45 °C. “As long as it lasts for two or three hours at 40°C, you can kill the cockroaches. You can see the effect when you remove the film on the same day, which is much faster than pesticides!”

2 change your mind and method to cure

Why can it be easily killed by the high-temperature laminating method? How to break the window paper of this revolutionary achievement? The chief expert of the research and demonstration team of crop roots prevention and control technology of the Chinese Academy of Agricultural Sciences The friendly army told reporters that this is not a one-night event, nor is it a whimsy, but based on long-term research and understanding of the learning of cockroaches.

"The flying insects have very poor flight and activity ability, mainly relying on the accumulation of years, so the old production areas of leeks often occur seriously. We have done indoor research and found that the adult mites are exposed to temperature at 37 ° C for two hours, or not produced. Eggs, or eggs produced, do not hatch. In the field monitoring survey, it is found that there are few in the south of the Yangtze River with high temperature and many in the north, mainly in the spring and autumn, and there is very little summer in the dry and hot days. The analysis grasps the weakness of the high temperature, but the root of the amaranth is not afraid of high temperature, so I think of using high temperature methods to prevent cockroaches." Zhang Youjun said that the first test in Shunyi in Beijing last year received good results, let this An idea was confirmed. Subsequently, experiments were carried out in Shandong, Tianjin, Anhui, Hebei and other places, and the control effects were close to 100%.

“When it comes to insecticides, many people will naturally think of using pesticides. In fact, there are many ways to prevent and cure cockroaches. Sometimes, there will be new breakthroughs in thinking and methods.” Shi Caihua told reporters that as a national public welfare industry (agriculture) research Special project, "Research and demonstration of crop roots prevention and control technology" team has explored and researched from the screening of high-efficiency pesticide varieties, swatch trapping, pest control, sweet and sour liquid insecticide, ozone water treatment of insects, etc. Many achievements, such as the screening of high-efficiency and low-toxic pesticides such as clothianidin and thiamethoxam, have been registered, and the effect of killing with ozone water is also good, but the cost is high.

The sun-high temperature coating method does not use any chemical pesticides, and the combination of sunlight and film enhances the ground temperature to kill cockroaches. Not only is it environmentally friendly, the mulch film can be repeatedly used repeatedly, the cost is greatly reduced, and the insecticide is thorough and the operation is simple. The people are easy to master.

3 Let the leek grow with peace of mind and rest assured

These days, Tang Xiaowei plans to use the sun-cured high-temperature film method to prevent the remaining 70 acres of leeks. Looking at the gratifying leeks, Tang Xiaowei said happily to the reporter: "Look at me how long this leeks are good! The disease of leeks is very rare, and the biggest harm is smashing. Now I don’t use pesticides for cockroaches. Selling with confidence and eating peace of mind, I have cut the leeks and dumplings several times these days."

Tang Xiaowei was originally a leek broker, and he was afraid that the quality of the leeks to be purchased was not good enough to control, so a few years ago he simply planted leeks. He told reporters that leeks are actually a particularly good dish, but consumers are afraid to eat because of concerns.

Now Tang Yuwei has more enthusiasm for planting leeks and selling leeks. He estimates that at least 20% of the leeks will increase this winter. Not only does it increase revenue, but the cost also saves a large chunk. In the past, the cost of pesticides even exceeded that of chemical fertilizers, and it cost thousands of yuan per acre. "In this way, the most unhappy is to sell agricultural materials!" Tang Xiaowei said with a smile.

“韭蛆 has a great influence on the yield of leeks. It bites off the roots of leeks and causes the lack of seedlings and ridges. Every year before and after 'May 1' and '11', it is a period of cockroaches. The control can not lead to the harvest. The people are very headaches. Therefore, it is often necessary to use multiple pesticides to control the roots."

Zhang Lihuan told reporters that in the past, high-toxic pesticides such as organophosphorus were used to control cockroaches. In recent years, high-toxic pesticides have been banned. The quality and safety of local agricultural products are also very strict. Some people have been arrested for using prohibited pesticides. All are bio-pesticides and low-toxic and low-residue pesticides, and the results are ok, but the cost has also increased a lot.

"Using the high-temperature laminating method of sun-drying to completely solve the problem of cockroaches, not only saves the cost, but also increases the output. The important thing is that the quality and safety of leeks are guaranteed, and there is no need to worry about the accident anymore. The habit of the shed is similar, and the leeks are covered by the film. Therefore, the people are very easy to accept this technology, and they are very recognized." Zhang Lihuan said.

The reporter learned that the Shouguang Municipal Government is promoting this practical technology in the two main amaranth producing areas of Huanlong Town and Wenjia Street. Each village selects one or two model households for subsidies, and will work on all amaranth growers and cooperatives. The production enterprises carry out technical training, so that they are well-known households, and at the same time strengthen publicity to build a safe and amaranth brand.

Shi Caihua told reporters that in the future, research will be strengthened in the mechanization of high-temperature lamination in the sun to better accelerate the application and application of this new practical technology. The high-temperature coating method of the sun, the simple technology solves the big problem of prevention and control of cockroaches.

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