Mirid bug

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Scientific name: Helopeltis collaris Stal


A mirid bug nymph and lesions caused by its feeding on a young leaf (J. OSullivan)


Dark lesions on leaves and stem, and crinkled leaves (E. Vasquez).

Diagnostic summary

  • What they do to plants

    - adults and nymphs feed on young shoots of sweetpotato. Feeding punctures initially appear water-soaked but turn black after a few hours.

    - toxic effect of the salivary secretions causes a lesion at the puncture site.

    - expanding leaves become puckered as lesions constrict growth.

    - stem lesions below the tip cause tip death.

    - young nymphs prefer to feed on the growing shoot tips.  Later instars feed on the second and third leaf from the tip.

  • Abundant during rainy season.


Economic importance

Geographical distribution



Biology and ecology

Host range



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