See what is possible with a simple agrarian technic.

In the begining of the eighties the last century, I needed an electon-microscope, it was unpayable for a starting entrepreneur.
Driving with my car from Wageningen to Enkhuizen I saw a farmer working between two fields. And I thought when the vegetation between the fields have highly sensitive vegetable's for diseases (the reason for making a free corridor between two fields), I can use these vegetable's when I let them grow in an sterile environment ( in a buttercup with agar, sugar and minerals). Propably I needed for specific diseases specific vegetables. I used the first tests by making some garlic's viral-free. But the university came with assistence with their electron-microscope's. And that was the end of this cheap indirect and simple technic.