May 2013
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| Corn/maize field in South Dakota. Photo by Lars Plougmann (originally posted to Flickr as In the corn field],[CC-BY-SA-2.0 (http://creativecommons.org/licenses/by-sa/2.0)] via Wikimedia Commons |
These varieties have been genetically
transformed to suffuse themselves with one or more artificial forms
of insecticidal proteins modelled on those found in the soil
bacterium, Bacillus thuringiensis,
'Bt'.
Bt
crops are touted as needing less chemical insecticides: they are,
therefore, safer for people and the environment, and are less
expensive and more convenient for farmers. Nevertheless, nearly half
of farmers who are choosing Bt maize this year are still
intending to apply soil insecticides at planting time.

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