Does asparagus kill flies?

I have noticed on my asparagus plants quite a few dead flies.  I know what asparaus beetle looks like, I have been picking them off and killing them on sight this year and my asparagus looks much better for it.  But these are just "ordinary" flies, and it looks like they have flown onto the ferns and died there.  And I have a houseplant asparagus, and just noticed a fly has died on that too!  What is going on?

my first thought was - Does Asparagus kill flies ? Yes if you hit them hard enough
I wonder if its because I have noticed lots of spiders in Asparagus ,

Hester Winterbourne wrote:I have noticed on my asparagus plants quite a few dead flies.  I know what asparaus beetle looks like, I have been picking them off and killing them on sight this year and my asparagus looks much better for it.  But these are just "ordinary" flies, and it looks like they have flown onto the ferns and died there.  And I have a houseplant asparagus, and just noticed a fly has died on that too!  What is going on?

I'd like to repeat my question if I may!  Once again, the asparagus is starting to unfurl its fronds, the asparagus beetles have moved in and been duly squished, and sort of attached to one of the fronds is a large slightly dessicated and very dead hoverfly type creature, or possibly a yellow dung fly, there were lots of those around at the weekend on the sludge from the nettle fertiliser.  It's weird.