Detonate the bottle, the fireball from 1500 litres of propane should sort out any insects for a good few miles around.

This will tell you how to protect your house from the blast, basically whitewash the windows, that even stops a nuclear bomb from killing you it seems

Number1-
http://www.youtube.com/watch?v=mEXD-_O_MpY

Number2-
http://www.youtube.com/watch?v=GdX8nmht7bk

Number3-
http://www.youtube.com/watch?v=P0tx1PBn2t0

Number4-
http://www.youtube.com/watch?v=ehWQUZmHxIc

Number5-
http://www.youtube.com/watch?v=PgqhaZmPFRg

Number6-
http://www.youtube.com/watch?v=3oRJimBiUeU

Number7-
http://www.youtube.com/watch?v=e7QW-epWdbY