Meadow greedy nightinger "comeback", has invaded 7 provinces and regions

" grass greedy nightingarial in Hainan's annual breeding area has occurred in the pest of any insect state, from eggs to larvae to larvae, insects. In
, the level of prevention and control of the new crown outbreak in Hainan Province was lowered from one to three, and Lu Baoqian, a researcher at the Institute of Environment and Plant Protection of the Chinese Academy of Tropical Agricultural Sciences, was finally able to go to the scene to investigate the occurrence of grass-based nightingados.
as the temperature rises, spring-seeded corn will be sown from south to north, seedling, and wheat will grow back to green, and the population of grass-greedy nightings in China will continue to grow.
Wang Zhenying, a researcher at the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences and director of the Research Office for the Prevention and Control of Pests and Grasses in the National Corn Industry Technology System, told China Science Daily: "Although the occurrence of grass-based nightings in 2020 will be significantly higher than last year, it is based on China's Perfect crop pest detection system, a variety of prevention and control means and technology, sound prevention and control team, as well as last year in the monitoring and prevention and control work of successful experience, grassland greedy nightingado serious harm situation in our country can be effectively controlled, will not cause too much loss of crop yield. Wangtold China Science daily that the grass is greedy for nightingers "under conditions of about 25 degrees Celsius, basically 24 to 30 days to complete a generation." "
" this winter to early spring temperatures are higher than usual, so the grassland nightinger in the winter zone occurred in a wider range than we previously predicted. Hu gao
a professor at Nanjing Agricultural University's School of Plant Protection, told the China Science Daily that there is no phenomenon of latecover (stop-development) in grasslands, and that it is harmful to continue breeding in the annual breeding area.
"China's grassland greedy nightings mainly like to eat corn, other crops for less harm."
Hu Gao team based on the grass greedy nightingala preference temperature range, host plant planting range, as well as China's perennium temperature situation speculated that the grass greedy nightingala perennium winter zone in the coldest months 10 degrees C isotherm south.
" line has been around the North Regression Line all year, but this year it has moved about two latitudes north. So winter pests have also been found in southern Sichuan.
According to the National Agricultural Technology Extension Service Center on March 6 issued disease information, preliminary statistics, grassland greedy nightingach in Yunnan, Guangdong, Hainan, Guangxi, Sichuan, Guizhou, Fujian 7 provinces (regions) 176 counties (cities, districts) to find larvae, Yunnan, Hainan, Guangdong and other provinces occurred in general, some areas of the insect volume is high.
hainan breeding base includes Sanya, Ledong, Lingshui and so on, mainly breeding, Oriental City is hainan's largest commercial corn breeding area.
said: "These two areas mainly rely on plant protection companies to manage." The
affected by the new crown outbreak, the movement of people has been blocked, more than a month, the local prevention and control work has been affected.
" study this week found that the insect situation is worse than a month ago. In
, Hainan's temperature this winter is higher than in previous years, which is conducive to the breeding of grass-greedy nightings.
the corn market bullish, from October last year to April this year can grow two corn. "There's a lot of food, and there's definitely more bugs than there were last year." Lu Baoqian said.
in Guangxi, "at the end of February 2020, the grassland greedy nightinger occurred an area of 2286 mu, prevention and control area of 2490 mu." Chen
, an associate researcher at the Institute of Plant Protection of Guangxi Academy of Agricultural Sciences, who is conducting field research, told the China Science Daily that in previous years, Guangxi spring corn began planting in late February. However, some fields corn victimization rate is high, the insect source base is large, should strengthen the monitoring and control of grassland greedy nightings. "
" is currently the annual occurrence area, spring can provide direct effective insect source for the southern provinces. " grass is greedy for larvae. Chen Hongsong
Wang Zhenying said that as the temperature rises in March and April, Guangxi, Yunnan and other places began to grow spring corn, the area of host plants will increase, pest area will also increase greatly, so the population will certainly continue to rise.
"That's what we're more worried about right now." Although the southern winter area has been carrying out effective prevention and control work, but after generations of reproduction, its base must be large, the total number of northward migration is large. This
continue to face pressure to relocate overseas populations this year.
addition to Myanmar, Laos, Thailand and Vietnam have seen the annual breeding areas of grassy nightings.
only seven countries in Asia will have grass-green nightings in 2018 and 17 in 2019.
" so the pressure to move in abroad is still very large. Jiang Yuying, deputy director and researcher of the Pest Detection Department of the National Agricultural Technology Extension Service Center, told China Science Daily.2019 grassland greedy nightingado intruded into 26 provinces in China, occurred an area of more than 15 million mu, the actual harm area of 2.46 million mu, mainly affecting crops for corn.
experts interviewed agreed that in 2020 the grasslands will move north earlier, take place in a wider area, be more harmful, and the task of prevention and control will be more difficult. As of March 6, the cumulative area of grassland greedy nightinger occurred 760,000 mu, the current occurrence area of nearly 550,000 mu.
" insects have its laws, and as the monsoon strengthens, it moves north. Wang Zhenying said.
In January 2019, the grass-greedy nightingocy first invaded China, spreading from the surrounding provinces of Yunnan in April, reaching the Yangtze River basin in May, reaching the Huanghuaihai Xia corn area relatively late, and for the point of occurrence, the insects moved northward to Inner Mongolia Autonomous Region.
", released on March 6 this year, is equivalent to the end of April and the beginning of May last year. Jiang Yuying told China Science Daily that in March the grass began to fly northwards.
Hu Gao judged that, with the help of southwest air currents, grassland greedy nightinger in March can reach about 28 degrees north latitude, that is, Hunan, Jiangxi, but not particularly suitable for grass greedy nightinger crops, so "March is not harmful to the main crops."
the end of March, Jiangsu and Anhui are likely to see sporadic migration of grasslands, although the Yangtze River basin is mainly in April and May, a month earlier than last year.
may reach the Yellow River region of Henan and Shandong from May to June, and the northeast spring corn area in July.
Wang Zhenying predicts that the time to reach the Huanghuaihai Xia corn area will also be earlier than last year, and June coincides with the seedling period of Huanghuaihai Xia corn, most vulnerable to grass-greedy nightingong.
so this year's event will certainly be bigger than last year's. Wang Zhenying told the China Science Daily that the grass-greedy nightinger belongs to the scaly winged pest, which is a pest crop during the larvae period, and its control is certainly dominated by larvae. "The first step is bug detection.
time will I fly to? At what stage does the worm develop? It has to be clear. "Then, depending on what happens, be prepared for prevention and control."
" now there is a means of measurement, unlike last year when the grass greedy nightingads just came, we also do not know which tool is effective, such as high-altitude monitoring lights, black lights, and sexual inducement monitoring, under what circumstances with better results. Jiang
said that after groping, in late June last year, they and related scientific research units, enterprises found some effective means of monitoring.
The Ministry of Agriculture and Rural Affairs issued the "2020 National Plan for the Prevention and Control of Grass Greed Nightinger" requires that each village in the key counties of the country's corn production have at least one set of sex traps, and that each county be equipped with at least one high-altitude warning light in the southwestern and southern border areas, the flight-diffusion channel and the main corn-wheat-producing areas.
June 2019, the Ministry of Agriculture and Rural Affairs and the National Agricultural Technology Extension Service Center established the "Information Dispatch Platform for the Prevention and Control of The Occurrence of The Nightinger in The Meadows".
this is a large-scale application system of china's plant protection system, which can meet the needs of all levels of plant protection institutions information collection, transmission, aggregation, analysis, publishing, inquiry and other work.
Jiang Yuying introduced, this platform can dispatch all over the insect situation, prevention and control progress, layout of the overall prevention and control tasks. County plant protection station professional and technical personnel during the day to investigate the insect situation, at night through the platform to report the investigation.
"This year we have been implementing the insect and larvae 'first sight' day report, the occurrence of intelligence weekly reporting system, the first time to understand the expansion of the insect situation, for prevention and control to buy more time." "
" grassland greedy nightinger is listed as a major agricultural pest, in the important period of occurrence to adopt the daily newspaper system. From the county to the city to the province, and finally to the country. Wang Zhenying said. in the prevention and control means, "currently mainly chemical pesticides, can be combined with some biological pesticides, can also be combined with physical prevention and control, sexual booby traps and so on."
Wang Zhenying stressed that this year, the Ministry of Agriculture and Rural Affairs last year recommended 25 chemical agents based on optimization, "recommended are basically high-efficiency and low-toxic chemical pesticides and biopesticides, more environmentally friendly." "
" people may be worried about the side effects of chemical pesticides. Therefore, more emphasis should be placed on scientific drug use, to be used in the young larvae, the effect is good. The second is to choose the right medicine, if the medicine is not right, hit it is useless. Hu Gao said.
Wang Zhenying said that last year, China invested a lot of manpower and material resources in the publicity and popularization of the prevention and control of grassland greed, and has carried out large-scale technical training for agricultural technicians and farmers everywhere.
" country attaches great importance to, local governments at all levels attach great importance to scientific research, teaching, promotion departments attach great importance to the occurrence of grass greedy nightingar, harm and prevention and control, close cooperation between industry, education and research.
at the national level and in some provinces and regions have also added research projects on grassland-greedy nightingers. Therefore, from the research level, technology promotion level have done a lot of technical reserves. Wang Zhenying said.
" can certainly be prevented. Because this year we have made great efforts, and compared with last year, we are more aware of the habits of grass greedy nightings, the occurrence of the law, the law of harm, but also monitoring means, prevention and control technology, recommended medication, the heart has a number. So this year's confidence in prevention and control is a lot more than last year's. Jiang
said that this year's disaster relief funds are similar to last year's, and has been allocated to the local first time.
Lu Baoqian and Chen Hongsong both told China Science Daily that prevention and control efforts in Hainan and Guangxi are being carried out in accordance with the requirements of national defense.
the "New Crown" epidemic, the fly prevention work can be carried out, Hainan Province on the grassland greedy nightingar prevention and control work will also be fully carried out. The key period before the march and April flight should be conducted in a timely manner. Lu Baoqian said.