War against nocturnal moths

We've been invaded by this tiny nocturnal moth called the Pyrale, which comes from China, India and Asia.

Of an evening, if you leave a lamp near a closed window, the moths rapidly form a blanket over the glass panes of the window. It's a frightening insect, because we run up against unexpected problems when trying to eradicate it. Even when you try to use a garden hose to wash them off a window pane, the moths seem to enjoy themselves. Neighbors tell me that the best way to eradicate the moths is to leave a bucket of soapy water alongside the place where they gather when attracted by a lamp inside the house. Here's a photo of moths killed by that technique in Pont-en-Royans.

I've prepared six buckets of soapy water for this evening's planned attack. Meanwhile, some specialists recommend the use of plastic traps containing a phial of a pheromone that attracts male moths. That would be fine if you wanted to castrate them, say. To destroy the entire horde at one fell sweep, I prefer the soap suds solution.