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Sat, 30 May 2020 10:39:20 -0700 |
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In 1934, U.S. farmers applied the following amounts of pesticides:
Arsenicals, 80-90 million pounds
Sulfur, 73 million pounds
Kerosene, 10 million gallons
Mineral Oil Emulsion, 40 million pounds
Naphthalene and paradichlorobenzene, 21 million pounds
Pyrethrum, 10 million pounds
Nicotine sulphate, 2 million pounds
Rotenone, 1.5 million pounds
During WWII chemists developed organochlorines and organophosphates that
were toxic to some insects at very low doses, but that could be persistent
in the environment, and harmful to off-target organisms.
In recent years, the chemical and ag industries have been responding to
public pressure to develop more environmentally-friendly pest control
products. This is a work in progress.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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