Posted by kessol on June 25, 2011 at 23:19:30 from (75.121.66.241):
In Reply to: lets just say... posted by johnwayne360 on June 25, 2011 at 18:33:22:
The main reason for the ban was the effects on bird populations.
DDT is toxic to a wide range of animals in addition to insects, including marine animals such as crayfish, daphnids, sea shrimp and many species of fish. It is less toxic to mammals, but may be moderately toxic to some amphibian species, especially in the larval stage. Most famously, it is a reproductive toxicant for certain birds species, and it is a major reason for the decline of the bald eagle,[7] brown pelican[38] peregrine falcon, and osprey.[1] Birds of prey, waterfowl, and song birds are more susceptible to eggshell thinning than chickens and related species, and DDE appears to be more potent than DDT.[1] Even in 2010, more than forty years after the U.S. ban, California condors which feed on sea lions at Big Sur which in turn feed in the Palos Verdes Shelf area of the Montrose Chemical Superfund site seemed to be having continued thin-shell problems. Scientists with the Ventana Wildlife Society and others are intensifying studies and remediations of the condors' problems.[39]
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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