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.
Some of the pesticides sprayed on farm crops wash off in the rain and get into the waterways. The water plants absorb the pesticides.
air,soil and water only
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.
DDT levels in blood can be measured using laboratory tests that analyze blood samples for the presence and concentration of DDT and its metabolites. These tests can provide quantitative data on the levels of DDT present in an individual's bloodstream. It is important to consult with a healthcare provider or laboratory professional to properly interpret the results of these tests.
DDT is an insecticide.
DDT can be determined in soils, waters, plants, etc.
If over-used, DDT (Dichloro-Diphenyl-Trichloroethane) is likely to kill a lot of fish. If used properly (something that the World Health Organization is trying to do) then it will be present in most plants and animals. It is highly unlikely that it will approach dangerous levels as you would have to literally eat buckets of DDT to approach lethal exposure.
Some of the pesticides sprayed on farm crops wash off in the rain and get into the waterways. The water plants absorb the pesticides.
air,soil and water only
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.
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.
DDT levels in blood can be measured using laboratory tests that analyze blood samples for the presence and concentration of DDT and its metabolites. These tests can provide quantitative data on the levels of DDT present in an individual's bloodstream. It is important to consult with a healthcare provider or laboratory professional to properly interpret the results of these tests.
DDT gets into animal tissue and remains there, building up over time. It typically gets into the animal from the things that the animal eats. With very young animals, the DDT get from the mother to the pup after the pup is born by passing through the mother's milk and into the pup.
DDT is a pesticide.
DDT is an insecticide.
DDT is dichlorodiphenyltrichlorethane; biomagnification of DDT in some organisms is possible.
Yes, many animals and plants have been tested and proven to contain DDT years after it was applied to crops many miles away. The most notable case is that of the American Bald Eagle, whose eggshells were weakened by DDT contamination, threatening the entire Bald Eagle population for years. Some years after DDT was banned in the US, the eagle's normal reproductive cycle was restored, as the DDT levels in their blood was reduced.