The grass moth has been said several times! I have to say it today, because it is so important!
Last year, an autumn grain defense war was in full swing, this year it is the corn sowing season, this insect pest will come back, no one can say for sure, I think we can only let time witness, and what we have to do is to do a good job in the early prevention and control work on the basis of last year's effective prevention and control programs and measures, so that even if the insect pest breaks out, it will not be caught off guard, and everyone can fight another insect pest eradication war in an orderly manner.
The following small editor will take you to review the whole process of this defense war:
First of all, the introduction of the grass nocturnal moth, this pest is a major migratory pest on the corn, according to statistics in 19 years, there were 14 provinces, autonomous regions and municipalities in the country this pest, found to occur in an area of 1.384 million mu.
According to statistics from the Ministry of Agriculture and Rural Affairs, "the migratory grassland moth invaded our country. It quickly spread to 14 provinces (autonomous regions), causing a severe prevention and control situation."
According to statistics, the disaster situation in our province
● Rapid expansion and spread: Since its first confirmed discovery in Xichang City, Liangshan Prefecture on May 8 last year, the moth has "invaded" 52 counties (cities, districts) in our province.
●Local pests are heavy: the general rate of maize field plot insects reaches 5%-10%, and the rate of insect pest recurrent field plots is as high as 40%.
● The risk of disaster is large: the source of clouds and noble insects is convenient to move into our province, and the current growth period of corn in our province is very conducive to the moth's feeding
The first invasion, almost no natural enemies, the grassland night moth spread in half a month to 16 cities and states in our province
Pest infestation
● Can eat: like to eat more than 80 kinds of crops such as corn and sorghum, generally causing crop yields to decrease by 20%-30%, and causing harvest failure when serious, it is a binge eating pest
●Fertile: Female moths can lay 900-1000 eggs in their lifetime, complete a generation cycle in 2-3 weeks, and have a reproductive capacity 3-4 times that of corn borers
● Can fly: adult moths can fly 100 kilometers a night, female moths can fly 500 kilometers before laying eggs, good at group combat, nicknamed "marching insects"
What is the grass moth and where does it come from?
Introduction to the meadow nocturnal moth:
1. What is the grassland night moth?
The meadow moth is an insect belonging to the genus Spodoptera of the Lepidoptera noctiacea family Noctuidae.
The suitable development temperature of the grassland moth is 11-30 degrees Celsius, which can complete a generation in about 30 days at 28 degrees Celsius, and 60-90 days at low temperatures.
Second, how terrible is the meadow moth?
Strong reproductive ability: they are particularly capable of giving birth to babies, each time can lay 100-200 eggs, a lifetime can lay 900-1000 eggs.
Hosts are widespread: They are powerful enough to harm more than 80 species of plants and have caused more than $10 billion in damage worldwide.
Moving fast: They are good at navigating the fog (with the help of air currents) and traveling hundreds of kilometers at night.
Where does the meadow moth come from?
1. On January 18, 2019, China's Ministry of Agriculture and Rural Affairs disclosed that it had invaded China from Myanmar.
2. As of April 3, the grassland night moth has seen insects in 31 counties (cities) of 9 cities (prefectures) in Yunnan Province, such as Pu'er, Dehong, Baoshan, Lincang, Honghe, Xishuangbanna, Yuxi, Wenshan and Chuxiong, and some spring maize has found larvae as pests, the age of insects in the field is not neat, and some fields are more harmful. In The three cities and 5 counties (districts) of Hechi, Baise and Qinzhou in Guangxi Zhuang Autonomous Region, adult grassland moths were found to have moved in, and on April 3, larvae were found in Fusui County of Chongzuo City and Youjiang District of Baise City.
Integrated grassland moth control programme
According to the expert meeting study, the guidance given for the control of the grassland night moth drug
Crop protection at all times
Early corn sowing using 5.7% methyl vitamin salt + 5% lice mite urea or 14% insect mite indater + 5% lice mite sulfone, the grassland night moth has a nearly 30-day effective period to ensure the smooth emergence of corn; 3 weeks after the emergence of seedlings, the drug can be protected for another 2 weeks, you can control until the three-leaf stage of corn;
I hope that everyone will do prevention early this year and do a good job in prevention and control