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Preventive Control

Natural enemies


  1. Braconid
  2. Trichogramma


  1. Damselfly
  2. Ground beetle
  3. Rove beetle
  4. Spider
  5. Weaver ant


Weekly monitoring from tillering to flowering stage is advisable. Visual inspection, nets, and light traps are methods used to monitor leaffolder population. The adult moths can be identified with the markings on their wings. The larvae are found inside the folded leaves in tubular style. The economic threshold level is when damage is more than half of the flag leaf and the next two youngest leaves in each tiller are affected (Heong; Escalada; editors, 1997: pp. 129-174).

Management and cultural practices

  1. Split nitrogen fertilizer application. Apply nitrogen fertilizer during seedling, tillering, and panicle initiation. Heavy infestation occurs with high doses of nitrogenous fertilizer. Do not apply too much nitrogen in your field and not more than in those of your neighbors. The moths are attracted to the green plants (Khan; et. al., 1988: pp. 129-174).
  2. Practice proper sanitation. Clean border areas from weeds and grasses. They serve as alternate host.
  3. Monitor for crickets. They are good predators of leaffolder eggs (Reissig; et. al., 1986: pp. 119 -127).
  4. During the first 30 days after transplanting or 40 days after sowing, it is advisable not to control leaffolders as they will not cause significant economic loss. The rice crop can compensate from the damage when water and fertilizer are well managed (Reissig; et. al., 1986: pp. 119 -127).
  5. Practice crop rotation such as planting leguminous crops after the rice harvest.
  6. Avoid ratooning. The pupae might still be in the plant.
  7. In irrigated rice fields, plow-in rice stubbles and other plant residues, then subsequently flood the field.
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