05/04/2018
Great explanation about what treated seed corn looks like and what it does. I don't recall Keith ever telling me about refugee seeds, so I learned something new today!
π½This is what our corn seed looks like! π½
The colors you see are from the seed treatment. Seed treatments coat the outside of the seed to protect the plant from fungus and pests.
Seed treatments are an important tool for us because it gives a way to protect the corn plant at a time when it's most vulnerable, the first few days in the ground.
The colors you see are actually the same seed treatment but are colored differently to tell us something else!
The pink seed all has a trait called Bt. Bt is a naturally occurring bacterium found in the soil that happens to be deadly to a specific type of pest - the European corn borer. You can imagine what the corn borer does just by his name. Many farmers like us use seed developed with technology to have the Bt trait. Some other farmers, like those raising organic corn, spray Bt on their crops after planting to protect against corn borer.
The blue seed is what's called "refuge" seed. Refuge does not have the Bt trait. When we use Bt seed, we have to plant refuge. Our bags contain 5% refuge.
The refuge provides a place for corn borer to hang out, get fat, and reproduce. It's important because in the rare case that one corn borer survives after eating some of the Bt corn (which means he's resistant) he will still likely reproduce with a borer that has been hanging out in the refuge corn (not resistant). The offspring will still be impacted by the trait.
The amount of refuge you are required to plant depends on several factors, including your location. The cotton belt has to plant a higher percentage than the corn belt.