I do believe your issue is GT works with Forestry 4. either turn off the GT bees or update to Forestry 4. My guess is your using Forestry 3.6 for binnies mods, if so lookup Binnie patcher by Chalcohead, then you can run Binnie's with Forestry 4.
Ok thanks a lot I fixed the problem after installing Forestry 4 and gregtech 5.09.21