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

圖片編號： 116622273
拍攝者： Tamoumen