If the research for it had been mine pehaps I would have had a piece to myself all over the newspapers. Sadly I got the information from a University study,done a few years previously.
Just to put things in perspective, a garden in Manchester kept records of snail destruction. In the one year they removed over 200, 000 of them, but the telling phrase was, ' with no visible diminution of numbers'.
Wish people would learn that 85 percent of British slugs are either carnivorous and eat other slugs or have raddula too weak to chew green material and live on already dead or decaying vegetation. Snails are the real damage doers.