fungal diseases - black mold on a grain ear - grain disease

agricultural agriculture alternaria background barley biology black branch cereal cladosporium close closeup corn crop cut disease diseases ear farming flora fungal fungi fungicide fungus gerste grain green grow hordeum hyphae infect infection leaf loose macro mildew mold mould mycology nature neutral pathology plant powder problem protection rain rot science smut spore stemphylium ulocladium wet wheat