Papaver somniferum
"Botrytis allii" grows on "Allium" species including onion ("A. cepa"), aggregating onion ("A. cepa" var. "aggregatum"), shallot ("A. cepa" var. "ascalonicum"), garlic ("A. sativum") and leek ("A. porrum"). It may also infect wild "Allium" species and can grow saprophytically on decaying crop residues such as cereal, pea and bean straw. It is capable of colonizing and producing spores on sterilized poppy straw ("Papaver somniferum").