When planting a plot recently the planter operator asked for the tags from the seed bag – one from each hybrid that was planted. He takes them back to his office and records them. He also puts the hybrid into his GPS-powered computer unit in the cab.
Why go to this trouble? He wants to know what was planted where, and what type of traits and treatments it came with. For example, recently a bag of corn planted in a plot was glyphosate resistant – you could tell that from the 'R' in the company's numbering system.
The corn was also Liberty resistant, being Liberty Link corn. It carried a separate tag identifying it as Liberty Link. So with that information the plot manager knows he could spray glyphosate or Liberty on the corn without issue.
Many hybrids today have both corn borer and corn rootworm resistance. However, the hybrids used in this plot did not. They had the Herculex I corn borer trait, but not a rootworm trait. The tag for Herculex I specified information on required refuge. These hybrids didn't have the refuge built in a bag.
As far as rootworm control, he either had to add an insecticide, or see if the corn was treated with a high level seed insecticide and take his chances. It was corn following soybeans, but rootworms have been a problem in first-year corn in the area.
In this case the seed was treated, but only at the Cruiser 250 level. There are also 500 and 1250 levels. University research has shown that the 1250 rate is needed for rootworms, and then control is not nearly as consistent year in and year out as applying a soil-applied insecticide. Since the planter was equipped with Smart boxes with Aztec insecticide, the operator applied insecticide on these plots.
What you need to know is typically typed and stamped on the end of the bag below the stitch line and also included on tags for any traits or treatments that are also stitched into the bag.