Leaf marking on a field of leeks (Allium porrum)

Leaf marking on a field of leeks (Allium porrum)
Leaf marking on a field of leeks (Allium porrum)

Most Allium species are sensitive to HF. This is a field of leeks ([i]Allium porrum[/i]). In physiological terms the effect on growth is probably small but leaf marking may affect market value. (Note that leek is subject to a fungal disease that causes white leaf tips that might be mistaken for HF injury)