Fig. 1

Experimental design: one-day old worker bees were exposed to the 50 Hz E-field with the intensity of 5.0 or 10.0 kV/m for 1–3 h
Experimental design: one-day old worker bees were exposed to the 50 Hz E-field with the intensity of 5.0 or 10.0 kV/m for 1–3 h