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NL888 Posted 12 years ago
Grammar
What is "refuge requirement"?
I've googled it. But all results just are the use of the phrase and by far from all I've browsed none shows the definition of it.
Would you like to explain it?
Context:
Refuge requirements depend on economic factors. Hurley et al. (2001) and Livingston et al. (2004)
examine the characteristics of economically eficient refuge requirements for U.S. corn and cotton
producers, respectively, for the single-toxin Bt corn and Bt cotton varieties. Both studies demonstrate
that economic returns might be improved over the long run if corn and cotton producers comply
with refuge requirements because of forestalling the onset of Bt resistance. The size of the economi-
cally eficient refuge requirement, however, was shown to depend on the length of the time horizon,
the discount rate, and resistance evolution to conventional insecticides used to control target insect
pests in the refuge acres. The refuge!¯s ideal size was also shown to be extremely sensitive to how
dominant the inherited Bt resistance trait is. Larger refuges are required to maintain susceptibility
to Bt in target pest populations for longer time periods and when Bt resistance is inherited as a more
dominant genetic trait by the target insect species.
Would you like to explain it?
Context:
Refuge requirements depend on economic factors. Hurley et al. (2001) and Livingston et al. (2004)
examine the characteristics of economically eficient refuge requirements for U.S. corn and cotton
producers, respectively, for the single-toxin Bt corn and Bt cotton varieties. Both studies demonstrate
that economic returns might be improved over the long run if corn and cotton producers comply
with refuge requirements because of forestalling the onset of Bt resistance. The size of the economi-
cally eficient refuge requirement, however, was shown to depend on the length of the time horizon,
the discount rate, and resistance evolution to conventional insecticides used to control target insect
pests in the refuge acres. The refuge!¯s ideal size was also shown to be extremely sensitive to how
dominant the inherited Bt resistance trait is. Larger refuges are required to maintain susceptibility
to Bt in target pest populations for longer time periods and when Bt resistance is inherited as a more
dominant genetic trait by the target insect species.
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3 Answers
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Would you like to copy it and paste here? My access to the address is too slow to reach it.
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This is the relevant part:
What is refuge and what is its purpose?
Farmers who plant crops with Bt trait(s) must also plant a refuge area -- a block or strip of crops without the Bt gene. The purpose of the refuge area is to prevent pests from developing resistance to the technology.
By leaving non-Bt crops in the field, insects who feed on that crop rem
What is refuge and what is its purpose?
Farmers who plant crops with Bt trait(s) must also plant a refuge area -- a block or strip of crops without the Bt gene. The purpose of the refuge area is to prevent pests from developing resistance to the technology.
By leaving non-Bt crops in the field, insects who feed on that crop rem
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