Koppert Biological Systems has started the commercialization of Troyan®, a biological product containing entomopathogenic nematodes (which cause disease in insects) capable of controlling the plague of Capnodis tenebrionis, a beetle better known throughout Spain as the headworm almond. In recent years, this plague has spread throughout the country to become a serious problem because of the damage it causes in crops of almond, cherry, apricot, plum and peach.