Development of DDT DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations.
- 1 What is the meaning of DDT in biology?
- 2 What is DDT and why is it harmful?
- 3 What is DDT biology class 10?
- 4 Is DDT actually harmful?
- 5 Did DDT cause polio?
- 6 What countries have banned DDT?
- 7 Is DDT still used today?
- 8 What is DDT short answer?
- 9 What is DDT Slideshare?
- 10 What is DDT and BHC 11th?
- 11 What does DDT do to birds?
- 12 How long does DDT last in the body?
- 13 What does DDT do to fish?
What is the meaning of DDT in biology?
Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agriculture. Some countries outside the United States still use DDT to control of mosquitoes that spread malaria. DDT and its related chemicals persist for a long time in the environment and in animal tissues.
What is DDT and why is it harmful?
DDT is a class 2 insecticide, meaning it is moderately toxic. In experimental animals, such as mice, rats, and dogs, DDT has shown to cause chronic effects on the nervous system, liver, kidneys, and immune system. It has also been found that humans, who were occupationally exposed to DDT, suffered chromosomal damage.
What is DDT biology class 10?
DDT i.e. Dichlorodiphenyltrichloroethane is an insecticide that was extensively used in the past for the control of insects (crop protection and disease control). It is a chlorinated hydrocarbon that was a highly effective, but extremely persistent organic pesticide.
Is DDT actually harmful?
Human health effects from DDT at low environmental doses are unknown. Following exposure to high doses, human symptoms can include vomiting, tremors or shakiness, and seizures. DDT is considered a possible human carcinogen.
Did DDT cause polio?
All epidemiologists agreed that flies could transmit polio to humans, Weaver wrote, but most believed DDT could not stop the disease. And while there was evidence that flies transmitted polio, he added, it was unlikely that they transmitted most cases.
What countries have banned DDT?
The countries that have banned DDT include Argentina, Australia, Bulgaria, Canada, Colombia,Cyprus, Ethiopia, Finland, Hong Kong, Japan, Lebanon, Mozambique, Norway, Switzerland, and the USA.
Is DDT still used today?
DDT is still used today in South America, Africa, and Asia for this purpose. Farmers used DDT on a variety of food crops in the United States and worldwide. The reason why DDT was so widely used was because it is effective, relatively inexpensive to manufacture, and lasts a long time in the environment (2).
What is DDT short answer?
DDT ( dichloro-diphenyl-trichloroethane ) was developed as the first of the modern synthetic insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations.
DDT it kills insects, mainly mosquitoes that carry malaria and used in the military, during World War II, to combat and control diseases like typhus, and other insect-borne diseases, and was also used to get rid of body lice.
What is DDT and BHC 11th?
The structure is as follows: Hence, DDT stands for dichloro diphenyl trichloroethane, and BHC stands for benzene hexachloride. Note: BHC is banned in various countries because it has been found to be a human carcinogen, which can spread cancer.
What does DDT do to birds?
Populations of bald eagles and other birds crashed when DDT thinned their eggs, killing their embryos. The pesticide, known for accumulating in food webs and persisting in soil and river sediment, was banned in the United States in 1972.
How long does DDT last in the body?
DDT and DDE are resistant to metabolism; in humans, their half-lives are 6 and up to 10 years, respectively. In the United States, these chemicals were detected in almost all human blood samples tested by the Centers for Disease Control in 2005, though their levels have sharply declined since most uses were banned.
What does DDT do to fish?
Thus, DDT may possibly contribute to the high mortality found in eggs from Lake Rerewhakaaitu fish. It has been known for many years that DDT used as a pesticide on land can kill aquatic vertebrates and invertebrates (e.g., Eide, Deonier, and Burrell 1945; Everhart and Hassler 1948; Hoffman and Surber 1948, 1949).