"The loss comes after the planting of corn. Neonicotinoid pesticides are used to coat corn seed with air seeders. This results in having the pesticide dust blown into the air when planted. The death of millions of pollinators was studied by Purdue University. They discovered that Bees exhibited neurotoxic symptoms. They analyzed dead bees and found that traces of thiamethoxam/clothiandin were present in each case. The only major source of these compounds are seed treatments of field crops."