Bondi Junction NSW, Australia
Fact Sheets
Cucumber target spot (189)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide distribution. In the tropics. On a wide range of crops, including, beans and other legumes, capsicum, cucumber and other cucurbits, lettuce, papaya (see Fact Sheet no. 300), tomato. Ornamentals and weeds are also hosts. The fungus causes an important disease of tomato in Pacific islands (see Fact Sheet no. 163).
  • Numerous yellow, round or angular spots, bordered by veins, causing leaves to dry out rapidly and fall. Spread by wind-blown rain.
  • Cultural control: avoid planting near older infected crops; plant far from blocks of papaya; check seedlings for symptoms; use a trellis to aid air circulation; weed; do not work in the crops when wet; collect and burn trash after harvest; 3-year crop rotation.
  • Chemical control: chlorothalonil, copper, mancozeb, start when spots seen, and then at 10-14 day intervals.

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