Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Tomato target spot (163)

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  • Widespread distribution. In the tropics. On tomato, papaya (see Fact Sheet no. 300), cucumber (see Fact Sheet no. 189), legumes and probably weeds. An important disease.
  • Starts on older leaves, moving upwards rapidly in wet weather, destroying the entire plant.
  • Spores are spread in wind-driven rain.
  • Cultural control: check all seedling in nursery; do not plant new crops next to old; plant far from papaya (the trees commonly have the same leaf spot disease); remove lower leaves after trusses picked; weed; after harvest, collect trash and burn; tolerant varieties; 3-year crop rotation.
  • Chemical control: chlorothalonil, copper, or mancozeb. Start when spots seen, and continue until 3-4 weeks before last harvest.
Common Name

Target spot, leaf spot

Scientific Name

Corynespora cassiicola

AUTHOR Grahame Jackson
Information from Disease management: Target spot of tomato. IPM Florida. IFAS Extension, University of Florida, (; CABI (2020) Corynespora cassiicola (target leaf spot of tomato). Invasive Species Compendium. (; and MacLenzie KJ et al. (2018) A review of Corynespora cassiicola and its increasing relevance to tomato in Florida. APS Publications. (; and from Corynespora cassiicola (2020) Wikipedia. (

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

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