Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:15:44.5765998Z
   5
Rice striped stem borer (412)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Restricted. South, East and Southeast Asia, North America (Hawaii), Europe, Oceania. In Australia, Papua New Guinea.
  • Severe on rice, sorghum, maize, but also on sugarcane, millet, and wild grasses.
  • Larvae tunnel through internodes of stem to the growing point, killing it; stems pull out easily (‘deadhearts’). Panicles fail to emergence, or panicles emerge with white unfilled grain (‘whiteheads’).
  • Eggs (scale-like) up to 60 in several rows, yellow, laid on leaves. Larvae, yellowish, with five longitudinal purple to brown stripes, brown heads, 25 mm long. Disperse on silk threads. Adult forewings yellowish-brown, dark flecks and marginal black dots; hindwings whitish. Spread on the wing. Nocturnal.
  • Natural enemies: many egg and larval parasitoids and predators.
  • Biosecurity: introduction possible on produce contaminated with infested stems of host plants.
  • Cultural control: plough land well (IMPORTANT to bury larvae/pupae of previous crop); plant at higher density than normal; rotate two crops rice then fallow, or plant maize, soybean or peanut; synchronise plantings with neighbours; submerge eggs by raising water occasionally; weed; apply split applications N; harvest at ground level to remove larvae; plough in stubble, unharvested plants and weeds; use resistant (short, high tillering, early maturing) varieties.
  • Chemical control: use abamectin, or tebufenozide to disrupt moulting. Avoid broad-spectrum insecticides to preserve natural enemies.

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