GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 17 Jan 2019, 05:56

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### The winning strategy for a high GRE score

January 17, 2019

January 17, 2019

08:00 AM PST

09:00 AM PST

Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
• ### Free GMAT Strategy Webinar

January 19, 2019

January 19, 2019

07:00 AM PST

09:00 AM PST

Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

# The sustained massive use of pesticides in farming has two

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Director
Joined: 29 Nov 2012
Posts: 758
The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

Updated on: 09 Oct 2018, 14:38
7
22
00:00

Difficulty:

5% (low)

Question Stats:

89% (01:05) correct 11% (01:25) wrong based on 2670 sessions

### HideShow timer Statistics

The sustained massive use of pesticides in farming has two effects that are especially pernicious. First, it often kills off the pests' natural enemies in the area. Second, it often unintentionally gives rise to insecticide-resistant pests, since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed.

From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of pesticides can be extended by doing which of the following, assuming that each is a realistic possibility?

(Al Using only chemically stable insecticides
(B) Periodically switching the type of insecticide used
(C) Gradually increasing the quantities of pesticides used
(D) Leaving a few fields fallow every year
(E) Breeding higher-yielding varieties of crop plants

CR07612

Originally posted by fozzzy on 12 May 2013, 21:59.
Last edited by bb on 09 Oct 2018, 14:38, edited 6 times in total.
formatting for the verbal review project
Retired Moderator
Joined: 15 Jun 2012
Posts: 1010
Location: United States
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

12 May 2013, 22:33
11
1
fozzzy wrote:
The sustained massive use of pesticides in farming has two effects that are especially pernicious. First, it often
kills off the pests' natural enemies in the area . Second, it often unintentionally gives rise to insecticide-resistant
pests, since those insects that survive a particular insecticide will be the ones most resistant to it, and they are
the ones left to breed.

From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of
pesticides can be extended by doingwhich of the following, assuming that each is a realistic possibility?
(Al Using only chemically stable insecticides
(B) Periodically switching thetype of insecticide used
(C) Gradually increasing the quantities of pesticides used
(D) Leavinga few fields fallow every year
(E) Breeding higher-yielding varieties of crop plants

Fact: sustained massive use of pesticide ==> kills off the pest's enemies & give rise to insecticide-resistant pests
Conclusion: those insects survive a particular insecticide ==> the ones left to breed

Because pests can resist a particular insecticide ONLY IF this insecticide is used over and over again.
To prevent the pests from resisting a particular insecticide, the most effective way is to change type of insecticide used.

B says exactly how to prevent pests from resisting insecticide.

Hence, B is correct.
_________________

Please +1 KUDO if my post helps. Thank you.

"Designing cars consumes you; it has a hold on your spirit which is incredibly powerful. It's not something you can do part time, you have do it with all your heart and soul or you're going to get it wrong."

Chris Bangle - Former BMW Chief of Design.

##### General Discussion
Manager
Joined: 27 Jul 2011
Posts: 145
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

12 May 2013, 22:23
5
The sustained massive use of pesticides in farming has two effects that are especially pernicious. First, it often
kills off the pests' natural enemies in the area . Second, it often unintentionally gives rise to insecticide-resistant
pests, since those insects that survive a particular insecticide will bethe ones most resi stantto it, and they are
the ones left to breed.

From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of
pesticides can be extended by doingwhich of the following, assuming that each is a realistic possibility?

survive a particular insecticide ...so massive use can only be extended if we can attack this "particular type insecticide"

(Al Using only chemically stable insecticides new knoweldge -ignore
(B) Periodically switching thetype of insecticide used->correct :there are changing it..so if that pesticide survived by one type chances r it will be killed by other type
(C) Gradually increasing the quantities of pesticides usedthe stronger ones can resist the higher quantity
(D) Leavinga few fields fallow every yeardoes not help us
(E) Breeding higher-yielding varieties of crop plantsu need a ans discussing about pesticide

so B
Manager
Status: *Lost and found*
Joined: 25 Feb 2013
Posts: 121
Location: India
Concentration: General Management, Technology
GMAT 1: 640 Q42 V37
GPA: 3.5
WE: Web Development (Computer Software)
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

12 May 2013, 22:31
As the OA mentiones, the answer would be [B].
We can see that the question requires the effectiveness of the sustained massive use of pesticides to be extended. The paragraph above describe the destructive effects of the massive use of pesticides in farming which are:
1. kills off the pests' natural enemies in the area
2. gives rise to insecticide-resistant pests.

Now the first effect is not highlighted in any of the choices, but the second reason can be countered by continous change in the variety of insectiside so that the pests do not get acquainted with a given type of insectiside. The above argument is presented under the choice [B]. Rest of the choices can be eliminated for obvious reasons.

Hope this helps!

Regards,
Arpan
_________________

Feed me some KUDOS! *always hungry*

My Thread : Recommendation Letters

Intern
Joined: 14 Apr 2013
Posts: 42
GMAT 1: 740 Q50 V40
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

12 May 2013, 22:47
4
Argument:
Sustained massive use of pesticides in farming has two effects
1. it often kills off the pests' natural enemies in the area
2. it often unintentionally gives rise to insecticide-resistant pests , since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed.

Pre thinking:
Sustained use kills natural enemies.
Sustained use of a particular pesticide wills make insects that survives as resistant to that pesticide.
So by using one pesticide for too long we are actually creating insects resistant to that pesticide. Hence a way to avoid this is not to use one particular pesticide for too long.

Analysis of answer choice
(Al Using only chemically stable insecticides
INCORRECT: Irrelevant as chemical stability is not a problem here.
(B) Periodically switching the type of insecticide used
CORRECT: Since using one particular pesticide makes insects resistant to it so a better approach would be to change pesticides so that insects which develops resistance against one type gets killed by other type of pesticides.

(C) Gradually increasing the quantities of pesticides used
INCORRECT: Argument already talks about sustained massive use which is not having effect on pesticide resistant insects.

(D) Leaving a few fields fallow every year
INCORRECT: It will not change the reasons which are causing the problem.

(E) Breeding higher-yielding varieties of crop plants
INCORRECT: higher yielding plants can still get affected by insects.
_________________

Intern
Joined: 23 Apr 2013
Posts: 21
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

14 May 2013, 02:19
fozzzy wrote:
The sustained massive use of pesticides in farming has two effects that are especially pernicious. First, it often kills off the pests' natural enemies in the area . Second, it often unintentionally gives rise to insecticide-resistant pests, since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed.

From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of pesticides can be extended by doing which of the following, assuming that each is a realistic possibility?

(Al Using only chemically stable insecticides
(B) Periodically switching the type of insecticide used
(C) Gradually increasing the quantities of pesticides used
(D) Leaving a few fields fallow every year
(E) Breeding higher-yielding varieties of crop plants

Let us examine the options.

Option A: Using only chemically stable insecticides.
Chemical stability of the insecticides is not mentioned anywhere in the passage. Irrelevant.
Hence Option A is incorrect.

Option B: Periodically switching the type of insecticide used.
It is given that insecticide-resistant pests arise due to breeding of the pests which survived a particular type of insecticide. Therefore it is a logical conclusion that by changing the insecticides there is a chance to reduce the incidence of insecticide-resistant pests thereby extending the effectiveness of sustained massive use of pesticides.
Hence Option B is correct.

Option C: Gradually increasing the quantities of pesticides used.
This doesn't help because pesticides are also responsible for killing off the pests' natural enemies in the area. Also this gradual increase can lead to an even stronger insecticide-resistant varieties among pests.
Hence Option C is incorrect.

Option D: Leaving a few fields fallow every year.
Irrelevant. This doesn't help increase the effectiveness of sustained massive use of pesticides.
Hence Option D is incorrect.

Option E: Breeding higher-yielding varieties of crop plants.
Breeding higher-yielding varieties of crop plants doesn't help with problem of pests. It doesn't, in anyway, increase the effectiveness of pesticides.
Hence Option E is incorrect.

So the correct answer is Option B.
Intern
Status: Stay Hungry.. Stay Foolish..!
Joined: 14 Sep 2014
Posts: 9
Location: United States
Saranraj : Santhanam
Concentration: Entrepreneurship, Technology
WE: Information Technology (Computer Software)
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

09 Mar 2016, 16:47
Stmt structure :

Massive use of pest --> 1. Kill the natural enemy of pest --> 2. Resisted pest of the particular pesticide will breed. Hence the resisted pest will increase in the farming. This may not be good.

Pre-thinking: The resisted pest which can't be killed by a particular pesticide survives and breed.

a. Using only chemically stable insecticides - Nature of the pest is not discussed. can't be inferred.
b. Periodically switching the type of insecticide used - this is in alignment with prethinking. This will make sure that the survived pest may be killed if we use a diff one.
c. Gradually increasing the quantities of pesticides used - this can't be inferred.As the passage scope should be with in the usage of massive use of pesticides - and its reactions. Usage of more pest will not take any effect as it can be used only as much.
d. Leaving a few fields fallow every year - The passage scope is -- massive usage of pesticides and its effect. This option falls beyond its scope. Hence its incorrect.
e. Breeding higher-yielding varieties of crop plants - clearly irrelevant to the passage's scope.
Intern
Status: Stay Hungry.. Stay Foolish..!
Joined: 14 Sep 2014
Posts: 9
Location: United States
Saranraj : Santhanam
Concentration: Entrepreneurship, Technology
WE: Information Technology (Computer Software)
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

09 Mar 2016, 16:48
Stmt structure :

Massive use of pest --> 1. Kill the natural enemy of pest --> 2. Resisted pest of the particular pesticide will breed. Hence the resisted pest will increase in the farming. This may not be good.

Pre-thinking: The resisted pest which can't be killed by a particular pesticide survives and breed.

a. Using only chemically stable insecticides - Nature of the pest is not discussed. can't be inferred.
b. Periodically switching the type of insecticide used - this is in alignment with prethinking. This will make sure that the survived pest may be killed if we use a diff one.
c. Gradually increasing the quantities of pesticides used - this can't be inferred.As the passage scope should be with in the usage of massive use of pesticides - and its reactions. Usage of more pest will not take any effect as it can be used only as much.
d. Leaving a few fields fallow every year - The passage scope is -- massive usage of pesticides and its effect. This option falls beyond its scope. Hence its incorrect.
e. Breeding higher-yielding varieties of crop plants - clearly irrelevant to the passage's scope.
Verbal Forum Moderator
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2167
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

25 Sep 2016, 06:40
The sustained massive use of pesticides in farming has two effects that are especially pernicious. First, it often kills off the pests' natural enemies in the area . Second, it often unintentionally gives rise to insecticide-resistant pests, since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed.

Boil it down - 2 negative effects of pesticides - kills pest's natural enemies and gives rise to insecticide-resistant pests . The ones left will be resistant to pesticides .

From the passage above, it can be properly inferred that the effectiveness of the sustained massive use of pesticides can be extended by doing which of the following, assuming that each is a realistic possibility?

(Al Using only chemically stable insecticides - Irrelevant as per the argument the negative effects are for all kinds of pesticides
(B) Periodically switching the type of insecticide used - Correct - Suppose we use type A pesticide in first year and type B in second year , there is possibility that the pests that were resistant to type A might not be resistant to Type B .
(C) Gradually increasing the quantities of pesticides used - Incorrect
(D) Leaving a few fields fallow every year - Incorrect
(E) Breeding higher-yielding varieties of crop plants - Irrelevant

_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Director
Joined: 26 Oct 2016
Posts: 637
Location: United States
Concentration: Marketing, International Business
Schools: HBS '19
GMAT 1: 770 Q51 V44
GPA: 4
WE: Education (Education)
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

19 Mar 2017, 21:15
Evaluation of a Plan

Situation Continued high-level pesticide use often kills off the targeted pests' natural enemies. In addition, the pests that survive the application of the pesticide may become resistant to it, and these pesticide-resistant pests will continue breeding.

Reasoning What can be done to prolong the effectiveness of pesticide use?
It can be inferred that the ongoing use of a particular pesticide will not continue to be effective against the future generations of pests with an inherent resistance to that pesticide. What would be effective against these future generations? If farmers periodically change the particular pesticide they use, then pests resistant to one kind of pesticide might be
killed by another. This would continue, with pests being killed off in cycles as the pesticides are changed. It is also possible that this rotation might allow some of the
pests' natural enemies to survive, at least until the next cycle.

A Not enough information about chemically stable insecticides is given to make a sound inference.

B Correct. This statement properly identifies an action that could extend the effectiveness of pesticide use.

C Gradually increasing the amount of the pesticides being used will not help the situation since the pests are already resistant to it.

D Continued use of pesticides is assumed as part of the argument. Since pesticides would be unnecessary for fallow fields, this suggestion is irrelevant.

E Breeding higher-yielding varieties of crops does nothing to extend the effectiveness of the use of pesticides.

The correct answer is B.
_________________

Thanks & Regards,
Anaira Mitch

Retired Moderator
Joined: 19 Mar 2014
Posts: 937
Location: India
Concentration: Finance, Entrepreneurship
GPA: 3.5
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

11 Apr 2017, 11:02
Argument: Sustained massive use of pesticides in farming has two effects:

1. Kills Pests
2. Gives rise to insecticide resistant pests

We are trying to look for a scenario which can help in overcoming or reducing the impact created by the second point.

(Al Using only chemically stable insecticides – Out of Scope, chemical stability not discussed.
(B) Periodically switching the type of insecticide used – Looks correct – Lets hold this
(C) Gradually increasing the quantities of pesticides used – This will worsen it more, incorrect
(D) Leaving a few fields fallow every year – Irrelevant
(E) Breeding higher-yielding varieties of crop plants – Does not solve the pesticide issue

Correct Answer is B
_________________

"Nothing in this world can take the place of persistence. Talent will not: nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not: the world is full of educated derelicts. Persistence and determination alone are omnipotent."

Best AWA Template: https://gmatclub.com/forum/how-to-get-6-0-awa-my-guide-64327.html#p470475

Intern
Joined: 30 Nov 2017
Posts: 1
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

30 Nov 2017, 07:10
Get Major uses of pesticides, Plant growth Regulator And Major uses of biopesticide
SVP
Joined: 12 Dec 2016
Posts: 1608
Location: United States
GMAT 1: 700 Q49 V33
GPA: 3.64
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

15 Dec 2017, 16:49
Here is an official explanation:
Gradually increasing the amount of the pesticides being used will not help the situation since the pests are already resistant to it. Furthermore, while a rotation might allow some of the pests’ natural enemies to survive, at least until the next cycle, the method in C does not.
Non-Human User
Joined: 01 Oct 2013
Posts: 3583
Re: The sustained massive use of pesticides in farming has two  [#permalink]

### Show Tags

23 Dec 2018, 03:03
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: The sustained massive use of pesticides in farming has two &nbs [#permalink] 23 Dec 2018, 03:03
Display posts from previous: Sort by

# The sustained massive use of pesticides in farming has two

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.