Georg Wolfgang Franz Panzer was a German medical doctor, botanist and entomologist. He produced a book on the insect fauna of Germany, illustrated with hand-coloured plates by Jacob Sturm which was pr

Pegomya hyoscyami, the beet leafminer or spinach leafminer, is a grey fly about 6 millimetres long. It emerges in April–May and lays eggs on the undersides of leaves of beet, spinach, chard, and other