An urgent "wanted" and "plant killer" in Ningbo

Introduction: Garden online, Nov 22 news: Recently, an alien species called "plant killer" is spreading in urban and rural areas of Ningbo through its flowering period A plant defense battle is going on! Thin and long stalks, long and thin leaves, and a string of small golden flowers like the tail of a scorpion on the top of his head It looks so delicate and charming, with a smell and a fragrance This beautiful but vicious plant is the "plant killer" wanted urgently - "Canada's yellow flower" "Evil flower" has made more than 30 indigenous species disappear, covering an area of more than 20000 mu in Ningbo On November 2, Mao Guanglie, acting mayor of Ningbo, opened the mayor's mailbox Li Xiangjing, a citizen, was alerted by his letter According to the letter, on the road in front of Li Xiangjing's house, some plants that had never been seen before bloomed and spread in a large area, while other plants disappeared one after another After investigation, this kind of flower is a yellow flower An expert from Ningbo Agriculture Bureau said: a yellow flower originated from North America, which belongs to Compositae herb, blooms in September and October every year and matures in December This kind of flower has the characteristics of amazing reproduction ability and rapid occupation of space One plant can form more than 20000 seeds and germinate nearly 10000 seedlings The seedlings can grow to more than 1 meter in 4 months, but can grow to about 3 meters when the inflorescence is formed In the process of growth, it will compete with other species for nutrients, water and space, which will cause the green shrubs to die At the same time, it will also eat cotton, corn, soybeans, etc., affecting the yield and quality of crops According to the literature, the plant was first introduced into China in 1935 and cultivated in Shanghai and Nanjing as garden flowers, which later developed in the wild In the 1980s, it spread and became a malignant weed, which spread to Ningbo about six years ago In some flower shops, the reporter found that a yellow flower, like a star in the sky, was sold as an ingredient for flower basket arrangement, and there was a very nice name - "Orioles" The owner of a flower shop said he didn't know the harmfulness of the plant, and a few owners said they picked it directly from the wild It is reported that the invasion of a yellow flower has caused more than 30 indigenous species to disappear one after another, and the area in Ningbo has exceeded 20000 mu We should take measures as soon as possible to eliminate the spread of "yellow flower disaster", which is largely due to people's different understanding Some readers call the local media and say that there is a kind of Chinese medicine called "one branch of yellow flower" If the pharmacology of one branch of yellow flower in North America is the same, it may become a treasure According to the records of the Pharmacopoeia of the people's Republic of China, the flower has the functions of relieving wind, clearing heat, detumescence and detoxification It can be used to treat cold, headache, sore throat, jaundice, pertussis and other diseases According to an agronomist at Ningbo Agricultural Technology Center, the two kinds of yellow flowers smell a little similar, but their plant sizes are quite different, and their inflorescences are not the same It has been found that some countries in the world allow the use of "Canada's Solidago canadensis" as a medicine It has been reported that it has some effects of heat dissipation, moisture elimination, accumulation and detoxification, and some use it to develop natural nutrition cream and bath gel However, experts pointed out that due to the great differences between China and its origin in climate, soil and other aspects, it is not known whether a branch of yellow flower may produce variation in the breeding process According to an expert from Ningbo Institute of drug control, to determine whether a plant can be used as a medicine, it is necessary to confirm its components through the research department, analyze its toxicity and drug resistance, and then go through the drug research procedure, and enter the clinical trial after the animal test This process is very complex, which is less than three or five years, and more than ten years Worryingly, the plant's seeds are tiny and can spread like dandelion seeds in the wind It is difficult to find other plants in a growing area Its potential threat to dry crops such as cotton, corn and soybean should not be ignored Experts from Ningbo Agricultural Technology Station said that the fighters should not be delayed, and measures should be taken to eliminate them as soon as possible, so as to avoid the expansion of the harm area and the difficulty of prevention and control "First cut, then dig, then burn" is the best way It is urgent to make clear regulations on risk assessment, early warning, ecological restoration and compensation liability of alien species Zhuo Laobo, who lives in Xingfuyuan community in Jiangdong, said that a large number of yellow flowers have endangered the green belt of the community In fact, there is a trend of continuous concentration around the river beach, wasteland, roads, farmland and rural houses Because a branch of yellow flower belongs to perennial plant and has developed rhizome, the current methods are only limited to chemical control and artificial extraction At present, the plant is in the flowering stage, and herbicides are difficult to work Experts pointed out that the most important thing for now is to control its spread Recently, it is the flowering period of a yellow flower, which is easy to identify If we miss this period, it will be more difficult to control when its seeds spread around Manual removal is the most effective method at present In some places, the method of cutting off the leaves and stalks, digging out the roots and burning them after drying is adopted Although it takes a lot of manpower and material resources, the effect is obvious The Agricultural Department of Ningbo found that in the farmland with daily management, the disaster was relatively small Encirclement and suppression of "plant killers" has become a national action At present, various plant quarantine departments in Ningbo are conducting a general survey of the area of "Canada's Solidago canadensis" In view of its wide distribution, difficult prevention and control, and high cost, Ningbo City has widely mobilized the masses and unified actions to minimize the possible serious consequences Experts call for clear regulations on risk assessment, early warning, introduction, elimination, control, ecological restoration and compensation liability of alien species In particular, we should strengthen the management of intentional introduction of alien species in agriculture, forestry and aquaculture, and establish a directory system and risk assessment system for alien invasive species.