There is a small insect that has just been introduced to china in 2019, but it has long made the agricultural sector in all parts of our country a big enemy, no matter where it is, if you find this bug, you must report it, eliminate it and issue a warning to see this inconspicuous little bug - the grassland night moth.
For example, recently, "Hebei Daily" reported that it was learned from the Hebei Provincial Plant Protection and Plant Inspection Station that the province has found a total of 132 grassland moths, and on August 30 alone, 36 were found in the province in one day, and all the emergency prevention and control measures have been taken according to the requirements.
Meadow nocturnal moth, also known as the lure moth, pseudo-armyworm, autumn marching insect, autumn armyworm, meadow moth, etc., is a species of the genus of the nocturnal family gray-winged nocturnal moth, native to the tropical regions of North and South America, but now has spread to Africa, Asia, Europe and other places, its larvae and corn drill heartworm are very similar, adult insects grow between 2 to 3 cm, wingspan between 3 to 4 cm, weight is more than 5 grams, and some of the moths born in china are also very similar, but the head of the grassland moth has a sky pattern, no! Figure-of-eight pattern, easy to distinguish.
Don't look at this insect is small, but the harm is very large, it is very good at flying, but also very edible, the most like to corn, rice, millet, wheat, sorghum, sugarcane and other grass plants for food, but also eat cotton, sweet potatoes, potatoes, peanuts, kale and other crops or vegetables. These plants are the main source of human food crops, so the grassland moth is considered to be one of the main agricultural pests, if the number of such small insects increases, the main food crops of human beings will be damaged, and even affect human food security.
Grassland nocturnal moth is more harmful, another reason is that its reproductive ability is very strong, although its life cycle is only about 30 days, but it can breed several generations a year, tropical areas multiply for many years, temperate areas decrease with the increase of latitude, Hebei region can be renewed 4 to 5 generations per year, and each female moth can lay 500 to 1500 eggs each time, if a female moth and her offspring all survive and grow into adults in a year, its number will reach tens of billions, weighing up to hundreds of thousands of tons.
Some agricultural experts use 4 "very" to describe how much headache the grassland moth is, which are "very edible, very raw, very difficult to prevent, very capable of flying", which of these four characteristics is enough to make people depressed.
Grassland night moth was first discovered in Yunnan Province in January 2019, it is also considered to be the earliest time it entered China, although it has only been two years, but many provinces and cities across the country have been found reports, in fact, in 2019 it spread rapidly from Yunnan to 25 provinces in a very short period of time, affecting more than 14 million acres of food crops, it can be seen that once it floods, the consequences are unimaginable, this small bug has caused serious agricultural disasters to the United States, Mexico, Canada and other countries. So we must not wait for it to multiply.
From the distribution of these two years, it is migrating north from the southwest or south of China from May to August every year. In the middle and late august will spread to North China, Northwest and Northeast China and other places, a large number of nibbling on crops that are growing vigorously, this small moth has a strong adaptability, in the environment of 11 to 30 degrees Celsius can survive and reproduce normally, such a living environment almost covers most of China's agricultural production areas, so it is necessary to strictly guard against the occurrence of this small insect biological invasion phenomenon.
The Hebei Provincial Plant Protection and Plant Inspection Station requires all localities to effectively implement various measures for the monitoring and prevention of grassland moths to ensure the effectiveness of prevention and control, such as mobilizing technical personnel and farmers to carry out dragnet full-coverage censuses, key crop plots to focus on investigation, fully do emergency prevention and control, and minimize the agricultural losses caused by this pest.
Resources:
Hebei Daily's September 4 article "Beware! There have been 23 counties in Hebei that have found the grassland night moth"