Where are all the Insects?

Fly

Yesterday I noticed during a walk the absence of flies and all kind of flying insects. I posted already a article about the dying honey bees, which is caused by toxic chemical substances and electromagnetic pollution. But I have never seen the total absence of flying insects during this period of time. The weather is warm, the sun is shining, but there are no insects. Nobody around me seems to have noticed that. Do we live in a unreal world, where just computer and cell phones attracts the attention of human beings?