oat crown rust puccinia coronata var avenae

agricultural agriculture agronomical agronomy algeria algiers avenae bean cereal chemical coronata crown damage disease diseased environment erysiphe fabaceae farm field food fungi fungicide fungus garlic green greenhouse health healthy ill intensive leaves legume life loss losses microbiology mildew modern mycelium mycology natural nature oat organic pathological pathology pea pest photosynthesis phytopathology plant powder powdery production puccinia rust rusty sick stem striiformis teliospore treatment uredospore var wheat white