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black spot

Syllabification: black spot

Definition of black spot in English:

noun

A disease of plants, especially of roses, producing black blotches on leaves.
Example sentences
  • Many popular roses are also susceptible to three fungal diseases, whose names black spot, mildew, and rust are descriptive of their appearance on rose leaves.
  • A soaker hose waters the base of every plant, thereby minimizing black spot and mildew problems that often arise from wetting the leaves.
  • To prevent black spot from infecting new plants, spray with a synthetic chemical fungicide once every 10 days, starting in midspring.

Definition of black spot in:

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