Actually, that information is in the article.
Yeah, it's there. In two tiny paragraphs, completely buried under hysterical quotes from random clueless residents and loaded terms calling this natural occurrence a "mystery" that has scientists "baffled." And they basically invalidate those two paragraphs anyway by immediately following them up with, "But even he is surprised at the complete absence of nuts in parts of Virginia." (That is a great sentence if you take it out of context, though.)
They do get some props for actually squeezing those two paragraphs into the story, though. I've seen several other stories on this subject that don't even do that much.
I also enjoy the way they manage to imply a non-existent connection to Colony Collapse Disorder by quoting some woman whose scientific credentials consist of living in Virginia.
I guess freaking people out every couple of years by reporting on shark attack outbreaks has lost its luster.