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genetic modifications to cotton

Expert replies
by nikhilkatira » Wed Jun 23, 2010 5:22 am
Scientists have made genetic modifications to cotton to increase its resistance to insect
pests. According to farmers' reports, the amount of insecticide needed per acre to control
insect pests was only slightly lower for those who tried the modified seed than for those
who did not. Therefore, since the modified seed costs more than ordinary seed without
producing yields of higher market value, switching to the modified seed would be
unlikely to benefit most cotton farmers economically.

Which of the following would it be most useful to know in order to evaluate the argument?

A. Whether farmers who tried the modified cotton seed had ever tried growing other
crops from genetically modified seed

B. Whether the insecticides typically used on ordinary cotton tend to be more
expensive than insecticides typically used on other crops

C. Whether for most farmers who grow cotton it is their primary crop

D. Whether the farmers who have tried the modified seed planted as many acres of
cotton, on average, as farmers using the ordinary seed did

E. Whether most of the farmers who tried the modified seed did so because they had
previously had to use exceptionally large quantities of insecticide
Best,
Nikhil H. Katira
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Source: — Critical Reasoning |

by albatross86 » Wed Jun 23, 2010 5:33 am
We know that the modified seed is more expensive, and that farmer's claim that it does not significantly reduce the need for insecticide per acre. It also does not increase market value of the yield and is thus said to be unlikely to benefit farmers economically.

What would be useful information that would help us decide whether this is true or not?


A. Well whether or not they grew other modified crops is irrelevant to the economical feasibility of this particular cotton crop.

B. The cost of the insecticide compared to that used in other crops is irrelevant as we are only concerned with cotton. Also we are only able to compare amounts of insecticide used and not its cost.

C. Whether or not it is their primary crop is irrelevant to the argument of its economical feasibility as a modified crop.

D. We are concerned with amount of insecticide used PER ACRE and hence it is irrelevant whether or not the two sets of farmers planted different areas in acres.

E. Bingo. This addresses the concern that we do not have statistics about the amount of insecticide per acre that the farmers who used the modified seeds were utilizing before they tried the modified ones. What if before these seeds they were using a very large amount of insecticide as compared to the other farmers, and decided to try the modified ones and found it to greatly reduce the amount of insecticide needed? This would indeed indicate as to the economical benefits of such modified seed and would thus be useful information to know in order to evaluate the argument that this modified seed may not have economic benefits.

Pick E.
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by ansumania » Wed Jun 23, 2010 7:06 pm
the quantity of insecticide needed for genetically modified is slightly less that that needed for normal seeds.....

what if the cost of insecticide is too high.......the difference in total cost could be high which might be more than the difference in cost of the different types of seeds......

IMO B....
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