| 释义 |
tar spot
noun
Etymology: tar (I)
1.
a. : a leaf-blotch disease of maple, willow, or oak caused by fungi of the genus Rhytisma that produces raised black stromatic cushions on the foliage
b. : one of the spots produced
2. : a disease of many grasses caused by a fungus (Phyllacora graminis) and resembling the tar spot of trees |