A proposed international scale for estimating intensity of banana leaf spot (Mycosphaerella musicola Leach)

  • Authors : Stover, R.H.

  • Document type : Journal article

  • Year of publication : 1971

  • Journal title : Tropical Agriculture

  • Volume (number) : 48 (3)

  • Pages : 185-196

  • Peer-reviewed : Yes

  • ISSN : 0041-3216

  • Language(s) : English

  • Abstract : A scale for estimating intensity of banana leaf spot was developed and tested. A series of scale drawings with measured levels of spotting were made to aid in estimating percentage leaf destruction. Spotting intensity was classified into five grades: 0, less than ten spots per leaf; 1, less than five percent tissue destroyed; 2, 5 to 15 percent; 3, 16 to 33 percent; 4, more than 33 percent. In commercial plantations in Central America most spotted leaves are classified as grade 1. A form for recording disease grades as well as leaf location or age is shown, and methods of plotting the data are suggested. The grading system studied is proposed as an international scale for estimating the intensity of banana leaf spot. By using an international scale, it will be possible to compare results of experiments carried out by different workers in ail parts of the tropics. (Author's abstract).


  • Open access : No

  • Document on publisher's site : close View article on publisher's site

  • Musalit document ID : IN070481

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