DuPont ( a main manufacturer of DDT and 2, 4-D ) and Velsicol Chemical Company ( exclusive manufacturer of chlordane and heptachlor ) were among the first to respond.
32.
DuPont, a major manufacturer of DDT and 2, 4-D, and Velsicol Chemical Company, the only manufacturer of chlordane and heptachlor, were among the first to respond.
33.
Much of the association's early work was on organochlorine pesticides and this work helped to bring in a ban on the use of dieldrin, aldrin and heptachlor seed dressings in 1962.
34.
If you are a farmer or serious gardener or worry about termites eating your home, you will recognize the others _ aldrin, chlordane, dieldrin, endrin, heptachlor, mirex and toxaphene.
35.
Hexachlorocyclopentadiene forms an adduct with cyclopentadiene, and chlorination of this adduct gives predominantly two chlordane isomers, ? and ?, in addition to other products such as " trans "-nonachlor and heptachlor.
36.
The OCPs or pesticide-POPs identified on this list have been termed the " dirty dozen " and include aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, hexachlorobenzene, mirex, and toxaphene.
37.
When, in 1962, the landmark anti-pesticide book " Silent Spring " was first published, Velsicol was the sole manufacturer of two pesticides chlordane and heptachlor featured prominently within it.
38.
The sampling spread all over the country and sites adjacent to sugarcane growing areas where heptachlor applications are sufficiently permitted, said Ruhul Amin, a senior scientific officer of the Institution of Food and Radiation Biology ( IFRB ).
39.
The reckless use of DDT and heptachlor, the two highly-toxic pesticides of the so-called dirty dozen family, are heavily contaminating the underground water in the rural areas, creating the health hazards for the people.
40.
The Agriculture Department does not require that every flock be tested; Townsends started checking the feed as well after an incident in 1989 in which its Arkansas subsidiary had to destroy 400, 000 chickens that had been contaminated with the pesticide heptachlor.
