black sigatoka

noun

Definition of black sigatoka

:a serious leaf spot disease of bananas caused by an ascomycetous fungus (Mycosphaerella fijiensis) and marked initially by small, dark brown streaks on the lower surface of the leaf
  • Banana researchers recently discovered black sigatoka, a disease that attacks banana leaves, on local crops.
  • —Ryan MaldonadoMiami Herald7 Jan. 1999
  • The plants have been genetically modified to resist black sigatoka, a leaf spot disease caused by the fungus Mycosphaerella fijiensis.
  • —Anne DauwersNature28 June 2007
; also :the causative fungus
  • Another dark shadow is black sigatoka, a fungus that turns banana leaves black and blocks photosynthesis.
  • —David GrimmScience14 Dec. 2008

There's more!

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!
Already a subscriber? Log in.

First Known Use of black sigatoka

1980


Seen and Heard

What made you want to look up black sigatoka? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a ram's-horn trumpet used in Judaism

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!