Chilo suppressalis

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Chilo suppressalis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Crambidae
Genus: Chilo
Species: C. suppressalis
Binomial name
Chilo suppressalis
(Walker, 1863)
  • Crambus suppressalis Walker, 1863
  • Jartheza simplex Butler, 1880
  • Chilo simplex
  • Chilo oryzae Fletcher, 1928

The Asiatic rice borer (Chilo suppressalis) is a moth of the Crambidae family. It is a widespread species, known from India, China, eastern Asia, Japan, Taiwan, Malaysia to the Pacific.

The wingspan is 25 mm. Females are somewhat larger than the males. Adults have pale yellow forewings, each with one or more dark spots. The hindwings are white.

The larvae feed on Chaetochloa verticellata, Echinochloa crusgalli cruspavonis, Echinochloa stagnina, Eleusine indica, Panicum barbinode, Paspalum conjugatum and rice. They bore the stems of their host plants, and therefore are also called Rice stem borer. The larvae are yellow, with five, dim, longitudinal lines, and can grow to a length of about 25 mm. They are a serious pest of rice and are largely responsible for the great reduction in the rice growing acreage in Hawaii.

Pupation takes place in a stem of the food plant.

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