I do recall one of my wine books specifically warning against fumigating a room containing wine bottles, reckoning it could taint the wine. Personally I suspect the chances of the stuff getting inside the seal, then onto the cork & into the cork & hence the wine is a little unlikely (unless you're into homeopathy, in which case it will undoubtedly give you lifetime protection from fumigation
As a precaution though, I'd be tempted to use the old routine (from the days of lead capsules) of wiping down the top of the bottle after decorking, but prior to pouring. After the wet cloth, you may also want to wipe again with a piece of Kitchen Paper/roll/towel (whatever it's called over there)
Were the fumigators aware of the wine and did they spray in the wine cellar? If so, it seems a little remiss of them not to suggest the wine be moved.