Pesticide
A pesticide is a chemical used to control, to repel, to attract or to kill pests, for example, insects, weeds, birds, mammals, fish, or microbes, considered a nuisance.
Examples of pesticidexs :
- herbicides for destruction or development prevention of weeds
- fongicides[?] for destruction or development prevention of fungi (example, QoI)
- insecticides for destruction or development prevention of insects
- Growth regulators[?] to prevent excess growth of a plant (prevention of lodging in wheat)
- molluscicides[?] (against snails...)
- acaricides[?] against acari
- products favoring plant resistance...
Chemical engineers develop new pesticides continually as insects grow resistant to older chemicals with steady use, requiring ever increasing dosages.
DDT is an example of a heavily used and misused pesticide.
Gene engineering plants (corn) to create and emit their own pesticides has become controversial with revelations of gene engineered corn contaminating U.S. food supplies in late 90s.
Vickers," he said, as he took a cup.html">cup of tea.html">tea from the hands
Trouble you for the toast, Vickers!"
"No indeed," says poor Mrs. Vickers, with the old girlishness
John's duties, however, are imperative. But the wind! My dear Mr. Frere,
but John would not let her go."
"By the way, how is Miss Sylvia?" asked Frere, with the patronising air
it's lonely for her here. There are no children of her own age,
with her. But I did not like to leave her behind, and endeavoured
said Frere, staring into his tea-cup. "That maid, you know--what was her name?"
"Miss Purfoy," said Mrs. Vickers, a little gravely. "Yes, poor thing!
and never heard the full particulars." He spoke carelessly,
Rex, and came out as my maid in order to be near him. She would never tell me
made by that horrid doctor--I always disliked that man--I begged her
Really a most superior creature. I think she must have been a governess."
Mr. Frere raised his eyebrows abruptly, as though he would say,
to me before. "However, her conduct was most exemplary--really
she taught little Sylvia a great deal. Of course she could not help
Got into some scrape, did he not? Half a cup, please."
"Miss Purfoy, or Mrs. Rex, as she really was, though I don't suppose
a little legacy from an old aunt in England." Mr. Frere gave
been expected. "And left my service. She took a little cottage
He was to get to Launceston, and so on board a vessel to Sydney;
She was only fined, but it ruined her."
"Ruined her?"
"Well, you see, only a few people knew of her relationship to.
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