| http://www.w3.org/ns/prov#value | - Exotic corn, like this, and domestic corn are preserved in ARS???s National Plant Germplasm System, providing a reservoir of genetic diversity on which breeders can call if a pathogen, pest, or other problem threatens a crop. (K7742-6) When the Russian wheat aphid spread to the United States in 1986, just about all of the country???s commercial wheat varieties were susceptible to it.
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