When it comes to the harm of herbicides, it can be divided into three types. One is the phytotoxicity caused to crops, the other is the harm to the human body, and the third is the harm to the environment. Introduced are many here today to explain the main herbicide on the human body and harm to the environment of the Chinese pesticide injury Network on crops: Herbicide harm to human body 1. Acute poisoning According to the World Health Organization and the UN Environment Agency, more than 1 million people are poisoned by herbicides every year, of which 100,000 die. The situation is even more serious in developing countries. In China, the number of herbicide poisoning accidents has reached nearly one million, and the deaths have reached more than 20,000. On September 24, 1995, CCTV reported that 540 people were poisoned by collective pesticides in a school in a school in Binyang County, Guangxi, due to consumption of cabbage that had been sprayed with highly toxic herbicides. This century is even more serious, and such incidents occur every year. 2, chronic hazards Chemical herbicides accumulate in the human body, although they will not cause obvious acute poisoning symptoms in a short period of time, but they can cause chronic harm, such as: destroying the normal function of the nervous system, interfering with the balance of hormones in the human body, affecting male fertility, Immunodeficiency. Chronic hazards of pesticides reduce human immunity, which affects human health, leading to an increase in the prevalence and mortality of other diseases. 3, carcinogenic, teratogenic, mutagenic The International Agency for Research on Cancer has confirmed from animal experiments that widely used herbicides have significant carcinogenicity. It is estimated that the number of cancer patients associated with chemical herbicides in the United States accounts for about 20% of the total number of cancer patients in the country. Herbicide harm to the environment 1, direct killing During the use of herbicides, a large number of non-target organisms are inevitably killed, resulting in the death of natural enemies of pests and other beneficial animals. A large number of pesticides in the environment can also cause acute poisoning of organisms, causing rapid death of biological groups. 2, chronic hazards Bioaccumulation of chemical herbicides is the most serious form of pesticide indirect harm to organisms. Herbicide in plants can be transported step by step through the food chain and accumulate, posing a potential threat to humans and animals, and affecting ecosystems. Herbicide bioaccumulation is particularly evident in aquatic organisms. For example, green algae can enrich 1 ppm of DDT in the environment to 220 times, and leech can enrich 0.5 ppm of DDT to 100,000 times. The United States Ming Lake uses DDT to control mosquitoes. The lake water contains DDT 0.02ppm. The lake green algae contains DDT 5.3ppm, which is 265 times of water. Finally, the content in the carnivorous fish body is as high as 1700ppm, enriched to 85000 times. 3. Destroy the ecological balance There are many kinds of pests and natural enemies in the farmland environment. Under natural environmental conditions, they are mutually restricted and in a relatively balanced state. The large use of herbicides, Liangzhu indiscriminately kills a large number of natural enemies of pests, seriously destroying the ecological balance of farmland and leading to increased resistance of pests. China's drug-resistant pests have spread throughout crops such as grain, cotton, fruit and tea. Seriously polluted the ecological environment and destroyed the natural ecological balance 18Mm Utility Knife,Retractable 18Mm Knife,Auto-Lock Utility Knife,Paper Cutter Knife Yucheng Weisite Measuring Tools Co., Ltd , https://www.wsttools.com
What are the hazards of herbicides?