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Potato cyst nematodes are a pest of potato crops. The nematodes can li

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Manager
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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 22 May 2013, 11:28
I chose B when I attempted this question but now I realized that B is actually out of scope.

A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.

(B) The only part of a potato plant that a nematode eats is the roots. --

I was thinking that No potatoes/potato roots will be present for nematodes to eat,so they will die.No.

The argument is to make them emerge from their protective cyst(not to kill them,we dont care whether they die or not),which only happens when potato roots emit certain chemicals.If making them emerge from their cyst is considered WIN and there will be no potato roots present,then definitely it is the magic of new chemical,which is exactly what company is trying to test.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 29 Jun 2016, 11:21
(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides. This is irrelevant to the plan. As the plan is talking about the use of the chemical emitted by potato roots. Ordinary Pesticides are not in picture anywhere.

(B) The only part of a potato plant that a nematode eats is the roots. This statement also has nothing to do with the plan. Whatever part of the potato plant the nematode eats does not support the company's plan of marketing chemical to the farmers.

(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts. Here we can consider two points, firstly, the chemical is planned to be spread on the fields when no potato plant is planted, so this statement of option C does not come into picture. As no plant, no root, no bacteria. Secondly, the chemical is spread explicitly by the farmers, we are not dependent entirely on the chemical emitted by potato roots.

(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts. As per this finding majority of nematodes will be starving to death.

(E) the chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing. This statement maybe true about the release of chemicals during potatoes growth lifecycle, but we are concerned with the chemicals explicitly spread by the farmers before the potatoes are planted

Thus, only option D remains and is the final answer.
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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 30 Jun 2016, 02:52
The Nematodes are in their Cysts... The company says that because of the Product any Nema... that will emerge will die....

Potatoes are not planted in fields.... there must be something to bring out Nema....

the chemical does the job to bring them out ...Hence D ... Not sure about 9/10 part .... I think it indicates almost all.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 17 Aug 2017, 22:06
arkle wrote:
I chose B when I attempted this question but now I realized that B is actually out of scope.

A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.

(B) The only part of a potato plant that a nematode eats is the roots. --

I was thinking that No potatoes/potato roots will be present for nematodes to eat,so they will die.No.

The argument is to make them emerge from their protective cyst(not to kill them,we dont care whether they die or not),which only happens when potato roots emit certain chemicals.If making them emerge from their cyst is considered WIN and there will be no potato roots present,then definitely it is the magic of new chemical,which is exactly what company is trying to test.


I address this question in the same way. I still think that B is attempting and that B could be correct.
The win here IMO could only be achieved only if nematodes "starve to death" after emerging from the protective capsules.
I considered both B and D but eventually went with B.
D IMO is not convincing.

Kudos [?]: [0], given: 22

Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li   [#permalink] 17 Aug 2017, 22:06

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