dieing trapout bees

[tincan]

started trapout 4 weeks ago 4 days later brought trapout box home full of bees made new queen  and are doing great 4 days later brought second trapout box home full of bees made new queen  and are doing great  6 days later brought third trapout box home full of bees they were doing great for 4 to 5 days and then started dieing week later like 6 pounds of dead bees in bottom of box small handfull of live bees and queencells when I moved third box home I put a weaker hive on trapout with laying queen and it is still in place at trapout and triving and bees are all alive and doing very normal . question is why did bees die in just 1 of 8 hives thank all very confused about this

[iddee]

Most likely cause, a neighbor dusted with sevin and only the one hive found it.

[tincan]

that could be because my first trapout attempt there I had bees die after few days but thought they got cold  so I waited till it warmed up a bit and tried again all the others are doing good  just bad to see that many bees that were healthy a few days earlier .I have some cash crop farmers that think there better than everybody and spray and dont say anything to us just alot of arrogance and stupidity.thanks