The primary suspected cause of this is a class of insecticides called neonicotinoids. These are not sprayed, but rather coated on seeds (which is arguably even

The primary suspected cause of this is a class of insecticides called neonicotinoids. These are not sprayed, but rather coated on seeds (which is arguably even more alarming). See: https://www.nature.com/nature/journal/v521/n7550/full/nature14420.html https://www.nature.com/nature/journal/v521/n7550/full/nature...