I believe it was the yellow jackets that finished off my strong hive last winter going into winter. I didn't realize what they were doing until the hive was already in collapse and it was too late to save it anyway. There were dozens & dozens of yellow jackets robbing the hive. I really feel for you. If you have weak hives, I'd just leave the honey and frames there and let the bees take what they can. no matter who's bees or what hive they came from. If they've been under attack, they can probably use all the help they can get on stores for the coming fall. IMHO, it's really too late in the year now to think about re-queening... the odds of survival are about zero, even being out there in SoCal. Sorry you're dealing with this and I hope the county can/will help you with the wasps.
The traps will help, but make sure you have them far enough away from the hives that the wasps don't have a "choice" between what they enter. I've heard they are also more effective if you hang a piece of meat inside as well. You'll probably be changing them out about every other day for a while till you get the population down. Hope you don't lose all your hives... again...
The traps will help, but make sure you have them far enough away from the hives that the wasps don't have a "choice" between what they enter. I've heard they are also more effective if you hang a piece of meat inside as well. You'll probably be changing them out about every other day for a while till you get the population down. Hope you don't lose all your hives... again...