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variants:
or less commonly angular spot
Definition of angular leaf spot
: a disease of plants in which the leaf spots have angular and usually sharply limited outlines (as that of cotton caused by the bacterium Xanthomonas malvacearum and that of cucumber caused by the bacterium Pseudomonas lachrymans) — see blackfire
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Time Traveler for angular leaf spot
The first known use of angular leaf spot was in 1892
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