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Dark-headed stripe borer

Scientific Name
Chilo polychrysus
Scientific Author
(Meyrick 1932)
Taxonomy
(Lepidoptera:Crambidae)
Status
Exotic Species Establishment in Australia
Reliability
High
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Commodity Type

  • Grains
  • Grasses
  • Rice
  • Sugarcane

Description

Primary host: Oryza sativa rice

Secondary hosts: Zea mays maize, Saccharum spp. sugar cane, Oryza latifolia wild rice, Eriochloa spp. grass, Panicum spp. grass, Scirpus grossus, Hymenachne pseudointerrupta, Setaria pollidefusca and S. italica (Kranz et al 1977), and Cyperus spp. wild grass (Harris 1990).

Rice stem borers can infest plants at all stages of development, from the seedling stage to maturity. Larvae damage the plant by boring down through the leaf sheath to the leaf base feeding on stem nodes which can weaken the stem where it breaks easily. If infestation occurs when the panicles are bearing, the panicles become discoloured with empty or only partially filled grains (AQIS 1987).


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