Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:15:35.4644301Z
   4
Rice gold-fringed borer (410)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Restricted. South and Southeast Asia, Oceania. In Papua New Guinea.
  • Minor on rice; a pest of sugarcane. Also attacks sorghum, maize and wild grasses.
  • Larvae tunnel through internodes of stem to the growing point, killing it; stems pull out easily (‘deadhearts’). Panicles fail to emerge, or emerge with unfilled grain (‘whiteheads’).
  • Eggs (scale-like) laid in 2-5 rows, white then black. Larvae, white with five bluish-purple lines along body, dark heads. Adult forewings yellowish to brownish, with silver dots and gold fringe; hindwings light brown. 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 (to bury larvae/pupae of previous crop); plant at higher density than normal; rotate, e.g., legumes; synchronise plantings with neighbours; submerge eggs by raising water occasionally; weed; apply split applications of 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: unlikely to be needed. Use abamectin. Avoid broad-spectrum insecticides to preserve natural enemies.

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