VIVARO, Italy  Giorgio Fidenato declared war on the Italian government and environmental groups in April with a news conference and a YouTube video, which showed him poking six genetically modified corn seeds into Italian soil.

In fact, said Mr. Fidenato, 49, an agronomist, he planted two fields of genetically modified corn. But since “corn looks like corn,” as he put it, it took his opponents weeks to find his crop.

The seeds, known as MON810, are modified so that the corn produces a chemical that kills the larvae of the corn borer, a devastating pest. Yet while European Union rules allow this particular seed to be planted, Italy requires farmers to get special permission for any genetically modified, or G.M., crop  and the Agriculture Ministry never said yes.

“We had no choice but to engage in civil disobedience  these seeds are legal in Europe,” said Mr. Fidenato, who has repeatedly applied for permission, adding that he drew more inspiration from Ron Paul than Gandhi.