Where have all the caterpillars gone?

I am standing at my sink chopping vegetables for dinner - and it comes to me................where have all the caterpillars gone? We generally buy organic fruit and vegetables (and meat and chicken too) except when the organic grocer is closed and I have to go to the supermarket. So today at lunchtime I was cutting up some strawberries and there was a little green caterpillar making its home on the side of one of the fruits. Wow, I thought, hello little fella. I picked him off and put him into the compost bin and continued on without a thought. Fast forward to the next meal time and I am washing the dirt off the potatoes and it dawns on me. I don't see those little green caterpillars on the conventionally grown fruit and vegies I buy at the supermarket. I wonder why ???? (these are ironic question marks by the way). Buy organic, save the caterpillar.