Help with Lupin's boggart / Cockroaches

[potioncat]

No: HPFGUIDX 97601


> Potioncat:
> > BTW, in OoP, do readers think he vanished his boggart 
> differently  than in PoA or that JKR just used a short-hand to 
> describe the  situation?  

Pippin:
> Lupin doesn't vanquish the boggart in PoA. Neville does. "[...]the 
> boggart exploded, burst into a thousand tiny wisps of smoke; 
> and was gone." --PoA 7


Potioncat:
No, I mean in OoP when Lupin takes care of the Boggart that is 
upsetting Molly.

Actually after I posted that question I saw that Carol had also 
asked it in 97458 Let's see if I can paste it then snip it.
 
> from post 97458
> Carol again:
snip
... but I also wondered about Lupin's simply vanishing the
> boggart in OoP. Maybe it *is* the riddikulus spell, but he's so
> familiar with it that he doesn't have to say it out loud--silent 
magic
> of the type that Snape uses to write potions recipes on the board, 
as
> I mentioned in a post to a different thread. But if that were the
> case, wouldn't the boggart have assumed a ridiculous form before
> vanishing (becoming a cockroach or whatever)?



Potioncat:  Any ideas?