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Bean leaf roller

Leaves are folded or webbed together and eaten from inside, leaving a silvery, papery look.

Omiodes indicata (Lamprosema indicata) Insect Fact sheet
The bean leaf roller moth (Omiodes indicata), with its golden brown wings
Photo: Kahio Tiberio Mazon, CC0, via iNaturalist

Crops it attacks

Utaw Soybean Mani Peanut Monggo Mungbean Sitaw String bean

Where the damage shows

On the leaves

When to act

Check 20 plants at 5 spots weekly from 2 weeks after emergence. Act only when more than 1 in 4 leaves are rolled with live larvae before flowering. Plants make up for light leaf loss.

What to spray

Active ingredients only, never brands. The IRAC group tells how it works: switch to a different group next time, so the pest does not learn to survive it. Spray only when the damage is worth the cost, and only with products registered with the Fertilizer and Pesticide Authority for your crop. Follow the label. The Shopee and Lazada links only show who sells something with that active ingredient, not a recommendation of any seller or product.

How to prevent it

  • Pick and crush rolled leaves with larvae inside while the attack is light.
  • Remove legume weeds around the field, and avoid legume after legume in the same plot.
  • Plow under crop remains after harvest to destroy pupae.
  • Plant on the same dates as your neighbors so the moths do not move from field to field.

Natural enemies and biological help

  • Small wasps, spiders and predatory bugs kill many larvae in the rolls. Leave light attacks unsprayed.
  • Bt sprayed on young larvae, before the leaves are fully rolled, spares these helpers.

Where this comes from

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