> That begs the question of why use fibronil.  Passive traps can be
reasonably effective, and the Australian's also use dessicants like
diatomaceous earth in traps.  These also increase beetle knock-down.  And
then there's always the diatomaceous earth on the soil in front of the hives
and chickens to eat beetles.

The traps that use DE are very labour intensive and there is the constant
problem of the bees propolising the gaps.  I got around that by having a
spare set of lids which were swapped and then the propolised tops taken home
and cleaned up with hot soapy water.  Underneath hives traps are not
practical for migratory beekeeping.

The Apithor trap is quick to use but is also subject to propolising.  See
details of how it was developed at
https://rirdc.infoservices.com.au/items/07-146  The only down side is that
eventually the SHB will become resistant to the fipronil and the trap will
then be ineffective.

Jerry had asked why fipronil? If you look at the previous work by Gary in
the references, it will give the trials he did to show why he chose
fipronil. 

Trevor Weatherhead
Australia
 

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