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Why would water plants contain DDT?
Some of the pesticides sprayed on farm crops wash off in the rain and get into the waterways. The water plants absorb the pesticides.
What is the major reason spraying with DDT and for banning it?
The major reason for spraying with DDT was to control mosquitoes and other disease-carrying insects. DDT was later banned due to its harmful effects on the environment and wildlife, as well as its potential negative impact on human health.
How much ddt present on plants?
DDT (Dichlorodiphenyltrichloroethane) was first synthesized in 1874, but it's insecticide properties weren't discovered until 1939.After finding that DDT was harmful to animals and humans, it was outlawed for most uses in the U.S. in 1972. Subsequently, it was banned for agricultural use worldwide in the Stockholm Convention. So, the short answer is, there should not be *any* DDT present on plants.
Who was the developer of DDT?
Although DDT was synthesized as early as 1874 by Othmar Zeidler, it was the Swiss chemist Paul Muller (1899-1965) who recognized its insecticidal properties in 1939. He was awarded the 1948 Nobel Prize in medicine for his development of dichloro-diphenyl-tricolor-ethene (DDT). Unlike the arsenic-based compounds then in use, DDT was effective in killing insects and seemed not to harm plants and animals. In the following 20 years it proved to be effective in controlling disease-carrying insects (mosquitoes that carry malaria and yellow fever, and lice that carry typhus), and in killing many crop destroyers. Increasingly DDT-resistant insect species and the accumulative hazardous effects of DDT on plant and animal lift cycles led to its disuse in many countries during the 1970s.
How does DDT get into the bodies of zooplankton?
Herbivores (like deer) eat the plants that it gets spread on. We'll say the plants have 1 piece of DDT. Since each deer eats LOTS of individual plants (we'll say leaves), the DDT in the deer will be more than the leaves had. We'll say this deer ate 100 leaves in one day, now it has 100 pieces of DDT in it. Then a wolf comes along and kills the deer and eats all the deer. Now the wolf has 100 pieces of DDT in it. The wolf kills ANOTHER deer the next day and eats it, and now this wolf has 200 pieces of DDT in it. So on and so on. So the MORE DDT you have in an organism's system, the more toxic it is. We call this bioamplification. Each food level it increases GREATLY in the fatty tissues.
Why would water plants contain DDT?
Some of the pesticides sprayed on farm crops wash off in the rain and get into the waterways. The water plants absorb the pesticides.
How is DDT spraying for malaria different than spraying for agriculture?
DDT spraying for malaria primarily targets disease-carrying mosquitoes in specific areas, often involving indoor residual spraying to reduce human exposure to malaria. In contrast, agricultural DDT spraying aims to control pests affecting crops over larger areas and usually involves different application methods and concentrations. While both uses involve DDT’s insecticidal properties, the focus in malaria control is on protecting human health, whereas agricultural use is centered on maximizing crop yield. Additionally, the regulatory frameworks and public health considerations differ significantly between the two applications.
What is the major reason spraying with DDT and for banning it?
The major reason for spraying with DDT was to control mosquitoes and other disease-carrying insects. DDT was later banned due to its harmful effects on the environment and wildlife, as well as its potential negative impact on human health.
Did they test ddt?
DDT can be determined in soils, waters, plants, etc.
Which scientist was most responsible for alerting the public to the risks involved in DDT spraying?
Rachel Carson, an American marine biologist and author, was most responsible for alerting the public to the risks involved in DDT spraying. Her book "Silent Spring," published in 1962, documented the harmful impacts of pesticides on the environment and raised awareness about the dangers of DDT to wildlife and human health.
How much old is Cristiano Ronaldo?
Polluted Water= In the mid-1900s, a biologist named Rachel Carson was afraid that some day there might be no more birds. Farmers were spraying a chemical called DDT on their fields to kill insects. But DDT was also keeping birds such as the bald eagle and peregrine falcon from having babies. DDT prevented the babies from hatching. She wrote a book called Silent Spring to warn about the dangers of DDT. = = Pollution happens when chemicals that are harmful to living things get into the environment. Rachel Carson feared that DDT would get into the food people ate. Her book scared a lot of people. Governments banned the use of DDT. People then began to worry about other kinds of pollution. They worried that pollution could harm people's health. =
How much ddt present on plants?
DDT (Dichlorodiphenyltrichloroethane) was first synthesized in 1874, but it's insecticide properties weren't discovered until 1939.After finding that DDT was harmful to animals and humans, it was outlawed for most uses in the U.S. in 1972. Subsequently, it was banned for agricultural use worldwide in the Stockholm Convention. So, the short answer is, there should not be *any* DDT present on plants.
What is an example of biomagnification?
Spraying a marsh to control mosquitoes will cause trace amounts of DDT to accumulate in the cells of microscopic aquatic organisms, the plankton, in the marsh. That is an example of Biomagnification.
How do mosquito larva hang just below the water surface help the adaptation?
The mosquito larva breath by putting their posterior on to the water surface film and breathing air. At one time spraying DDT was used on mosquito breeding areas to destroy the larva. Unfortunately, the side affect to wildlife proved too great to allow DDT to continue - and DDT was banned.
How does the DDT originnaly enter the food chain?
DDT originally enters the food chain through runoff from agricultural fields or from direct application to crops. It can then be absorbed by plants and accumulate in the tissues of animals that eat these plants. This process is known as bioaccumulation.
Who was the developer of DDT?
Although DDT was synthesized as early as 1874 by Othmar Zeidler, it was the Swiss chemist Paul Muller (1899-1965) who recognized its insecticidal properties in 1939. He was awarded the 1948 Nobel Prize in medicine for his development of dichloro-diphenyl-tricolor-ethene (DDT). Unlike the arsenic-based compounds then in use, DDT was effective in killing insects and seemed not to harm plants and animals. In the following 20 years it proved to be effective in controlling disease-carrying insects (mosquitoes that carry malaria and yellow fever, and lice that carry typhus), and in killing many crop destroyers. Increasingly DDT-resistant insect species and the accumulative hazardous effects of DDT on plant and animal lift cycles led to its disuse in many countries during the 1970s.
How does DDT get into the bodies of zooplankton?
Herbivores (like deer) eat the plants that it gets spread on. We'll say the plants have 1 piece of DDT. Since each deer eats LOTS of individual plants (we'll say leaves), the DDT in the deer will be more than the leaves had. We'll say this deer ate 100 leaves in one day, now it has 100 pieces of DDT in it. Then a wolf comes along and kills the deer and eats all the deer. Now the wolf has 100 pieces of DDT in it. The wolf kills ANOTHER deer the next day and eats it, and now this wolf has 200 pieces of DDT in it. So on and so on. So the MORE DDT you have in an organism's system, the more toxic it is. We call this bioamplification. Each food level it increases GREATLY in the fatty tissues.
