Any link to the actual study? Potential pitfalls of this kind of study:

- is the historical data available?

- is the decrease significant?

- is the sample size sufficient?

- is the sampling method reliable? (and conducted in the same conditions as the previous data points?)

- is there a difference between cultivated fields and uncultivated fields?

- is there any correlation between cultivation types and worm presence (not just usage of pesticides, but also types of cultures?)

- are there differences in soil properties (minerals, etc...)

etc...

I'd really like to have reporters link to the actual paper, or even better, datasets, in this time and age.