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Organic farmers are looking for non-chemical methods to rid

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Organic farmers are looking for non-chemical methods to rid [#permalink] New post 09 Jan 2005, 07:49
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A
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Organic farmers are looking for non-chemical methods to rid their crops of pests. Giving crops a slight electric shock has no ill effect on crops but rids them of caterpillars. This method should be employed by organic farmers all over the country.

Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural pests with the method mentioned above?

(A) Most species of caterpillar are subject to some natural predators.
(B) Many agricultural pests do not go through a caterpillar stage.
(C) This method also kills insects that are agriculturally beneficial.
(D) Since caterpillars of different species appear at different times of the year, several shocks would be necessary.
(E) No large-scale production facilities exist today for the product that electrifies crops.

HIGHLIGHT BELOW FOR OA:
OA is (C)










Please explain.
I know OG has the same question like this. But isn't (B) more correct? It is relevant with "methods to rid their crops of pests" not "how to have agriculturally beneficial". If "Many agricultural pests do not go through a caterpillar stage", then "rids them of caterpillars" will not happen.
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Re: CR - Organic farmers [#permalink] New post 10 Jan 2005, 00:30
[quote="qhoc0010"]Organic farmers are looking for non-chemical methods to rid their crops of pests. Giving crops a slight electric shock has no ill effect on crops but rids them of caterpillars. This method should be employed by organic farmers all over the country.

Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural pests with the method mentioned above?

(A) Most species of caterpillar are subject to some natural predators.
(B) Many agricultural pests do not go through a caterpillar stage.
(C) This method also kills insects that are agriculturally beneficial.
(D) Since caterpillars of different species appear at different times of the year, several shocks would be necessary.
(E) No large-scale production facilities exist today for the product that electrifies crops.




I would have gone B becaue the goal was to get rid of pests. In b is true than the method will not help reach the goal of elimiating psts... So confusing... can anyone explain why c
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 [#permalink] New post 10 Jan 2005, 07:58
Basically, the question is saying "what would weaken the statement". it is definitely between B and C

C - introduce new premise that show the method has ill effects
B - shift the focsu (narrow the focus) to caterpillar, but it does not help to explain anything.
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 [#permalink] New post 10 Jan 2005, 08:23
But it said "Organic farmers are looking for non-chemical methods to rid their crops of pests"
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 [#permalink] New post 10 Jan 2005, 09:17
(C)..WEll obviously, insect goes through caterpillar stage thus if this approach is going to eliminate caterpillars, then it will also eliminate insects that are benficial to plants.
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 [#permalink] New post 10 Jan 2005, 09:59
I pick C as my answer. I see a few of you think B is a good answer too. Here is my though: "Because many agricultural pests do not go through a caterpillar stage, it would not be advisable to try to eradicate agricultural pests with the method mentioned above." What about those pests that do go through a caterpillar stage? Obviously B is not convincing enough to pursuade not to use electric shock.
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 [#permalink] New post 10 Jan 2005, 11:43
Folaa3 wrote:
(C)..WEll obviously, insect goes through caterpillar stage thus if this approach is going to eliminate caterpillars, then it will also eliminate insects that are benficial to plants.


That is not true

12% of insects go through a stage where they are Nymps.... small versions of the adult without going through the stage of being a larvae (catipillar)

http://www.uen.org/utahlink/activities/ ... ty_id=2024

that is a logical explination though
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 [#permalink] New post 10 Jan 2005, 13:11
its a tough choice between B and C.
  [#permalink] 10 Jan 2005, 13:11
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