I haven't read GMO as a possible culprit, but I have seen monoculture, made possible by pesticides and GMOs, as a possibility. Industrial agriculture is rather sterile, not really providing a balanced diet for bees (or us for that matter). The cell phone thing is just batty though.
Remarkable- that list supports your conclusion way more when you insert an item! Darn those irrational technophobic nature-romanticists, putting mobile phones into lists where they don't belong.
Q. What do pesticides, GM food and mobile phones have in common?
A. Technophobic nature-romanticists hate them.
Those things are just the "usual suspects". They get blamed for anything.