Adoption of Genetically Engineered Crops in the U.S., and the new data provides important insights on the prevalence of so-called “stacked” varieties.’s Economic Research Service (ERS) recently updated the data product
A “stacked” variety of herbicide tolerance (e.g., Roundup Ready) and (i.e., insect protected). transgeniccorn or cotton is engineered to express two or more distinct — typically
The new release includes this chart illustrating the change over the last decade in the percentage of corn and cotton acreage planted to corn and soybean seed with stacked, . These types of seeds have been altered to be both
As evident in the chart, in 2008 45% of U.S. cotton and 40% of corn acreage were planted to stacked-varieties. A decade later, these numbers doubled – with 82% of cotton acres and 80% of corn planted to corn expressing more than one .
We have discussed the stacking of before on Hygeia. In many cases, that are individually considered “safe” are stacked with others without any research or assessment of the possible cumulative ecological or human health impacts of each new combination.
These data underestimate the number ofplanted. As resistance-management provisions were relaxed, and insects in some regions became resistant to different , companies added additional in the hope of sustaining effective control. Today on average, each acre of stacked- corn is expressing about 3 , as well as one or more herbicide-tolerance .
In fact, Monsanto-Dow AgroScience’s SmartStax corn expresses 6 separate, and two herbicide-tolerance , making it one of the most expensive corn seed technologies on the market. (The premium price charged for corn and cotton is driven by the number of expressed).
Morein a variety of corn or cotton translate into higher seed costs for farmers, which is one reason the is tracking trends in the number of .