Among them, eight kinds of invasive plants, including water hyacinth, water peanut, adenophora, rice grass, and Mikania micrantha, have brought serious harm to agriculture and forestry. There are 14 kinds of pests that cause the most serious harm, including American white moth, pine wood nematode,
Potato beetles, etc.
The 16 harmful alien species announced by the State Environmental Protection Administration are: Eupatorium adenophora, Mikania micrantha, Echinacea, ragweed, poisonous wheat, Spartina alterniflora, airplane grass, water hyacinth (water hyacinth), false sorghum, sugarcane
Flat moths, slash pine mealybugs, powerful beetles, American white moths, giant African snails, apple snails, and bullfrogs.
/view/39004.htm?fr=ala0 There are many on Baidu.
The rampant breeding of Bichhornia crassipes (commonly known as "water hyacinth" by the Chinese), known as the "Purple Devil" in waters around the world, is the most typical example of the invasion of alien species.
In 1884, the hyacinthia angustifolia, native to Venezuela in South America, was sent to the New Orleans Exposition in the United States. People from all over the world saw the gorgeous flowers and took them back to their respective countries as ornamental plants, unaware of their reproductive capabilities.
The extremely powerful Eichhornia crassipes has since become the number one harmful plant that troubles countries all over the world.
In Africa, water hyacinths are all over the Nile River; in Thailand, water hyacinths are all over the Chao Phraya River; and the inland river waterways along the Gulf of Mexico in the southern United States are also blocked by dense layers of water hyacinths, which not only makes it impossible for ships to pass, but also causes The fish and shrimps are extinct, and the river water is stinky; my country's Dianchi Lake in Yunnan was also accused by experts of suffering from "ecological cancer" due to the crazy spread of water hyacinth.
Author: Shangguan Yiyi 0 followers 2007-12-30 15:30 4 replies to this statement Reply: Biological invaders... data case (2) In addition, Australia's "rabbit plague", the Mediterranean "toxic algae", the American Great Lakes
"Zebra mussels", Hawaii's "frogs" and the invaded "Adenophora", "Spartina", "Pine wood nematode", "Canada goldenrod", "Crayfish", "American white moth" that have invaded our country
” There are countless examples of invasion of alien species.
Lacking the constraints of natural enemies, these alien invaders not only disrupt the food chain and threaten the survival of other organisms, but also cause huge economic losses to the world.
According to a report by the International Union for Conservation of Natural Resources (IUCN), the global economic losses caused by invasion of alien species exceed US$400 billion every year.
Fujian relies on science and technology to fight biological invasion Date: 2009-12-11 Author: Source: China Environment News Page 8 Copy link According to China Broadcasting Network, Fujian Province, which is located at the forefront of biological invasion, has used effective scientific research results in recent years to prevent external invasion
The proliferation of harmful species has achieved certain results.
Bacteria dorsifolia is a worldwide fruit killer, seriously harming more than 250 kinds of fruit trees and vegetables, causing tens of billions of losses nationwide every year.
Through research, experts from Fujian Province have found a biological method to deal with Bactrocera dorsalis.
The staff first captured male fruit flies and irradiated them with a certain amount of cobalt-60 rays to make them sterile.
The staff then released the fruit flies back into the wild.
In this way, after the male and female mate, they will not have children.
The plant, which is native to Brazil, grows all over field edges, rivers, and vegetable fields. It competes with crops for water and fertilizer, becoming a vicious weed.
The Fujian Provincial Academy of Agricultural Sciences used the flea beetle, a plant that specializes in eating lotus seeds, to effectively curb the ecological damage of this harmful weed.
In order to prevent water hyacinth from flooding and causing disasters, Fujian agricultural science and technology personnel found a way to kill water hyacinth by spraying mixed herbicides after research.
A new method developed by the Fujian Academy of Agricultural Sciences is expected to turn water hyacinth into a water purifier for rivers.
Spartina grows wildly on the tidal flats and takes over the tidal flats, causing fish, shellfish, algae and other organisms to lose their growth and breeding places. It is called the "tidal flat killer".
In the eastern Fujian area alone, the annual direct economic losses caused by this fishery amount to more than 464 million yuan.
The reporter learned that Fujian Agriculture and Forestry University, Academy of Agricultural Sciences and other units have also found ways to deal with the growth of Spartina grass, which can let Spartina grass rot in the tidal flats and turn into sea mud.