For the second day now I've got 20 or more bees that are congregating on the ground about 5 feet behind the hive. They're not looking too healthy, falling over and the dead bee count is rising in this spot.
this morning it's not a "congrgation spot" anymore, there are sick & dead bees all over, upside down unable to fly.
Varoa maybe? 2 days ago I did an inspection, but I wasn't looking for varoa... I have screened bottom boards and sprayed the trays with oil in april when I put my hives together. Maybe not enough oil or maybe I need to clean them more often. They are covered in debris, I'm unable to detect mites. I'll take a look in the hives, especially look at drown cells I read today...but what I read seems tricky in removing infested cells.
On 6/1 TruGreen pesticide was spot applied to lawn about 30 feet away.
Today's count is probably over 100 dead or suffering bees.
seems likely that or other pesticides are affecting your colony, you really need to check out your colony, and then all around your neighborhood for spraying hope it's mites thats treatable--pesticides are not. Hope everything works out and the bee kill stops soon. Been there done that no fun.
The following is quoted from the tru-green website.
>>>>The specific products applied to your landscape are detailed on your invoice with each treatment.<<<<
It seems that they may use a number of pesticides on a yard, so it could very well be the cause of your problem. I would contact them immediately, along with your local ag dept. and your state honeybee inspector.