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PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST

Bacterial leaf blight of rice

Xanthomonas oryzae pv. oryzae
Myanmar
  • Plant the resistant variety Sin Thu Kha
  • Plant 8“ X 6” spacing to avoid overlapping leaves
  • Early planting: Sow in 1st week of June-July
  • Do not overuse nitrogen fertiliser (urea 46%); 112 lb per acre
  • Use 28 lb per acre of potassium as basal dressing (45% K2O)
  • Remove infested plants, weeds, debris, which can serve as host of bacteria
  • Burn rice straw left from previous crop
  • 20 days after transplanting, check the field for yellow wavy line symptom at the tip of the leaves near the margin
  • For hybrid variety: take action when 30% damage of leaf area
  • For Sin Thu Kha variety: take action when 50% damage of leaf area
  • Check for wilting and yellowing of leaves, or wilting of seedlings
  • Follow good irrigation practices, i.e. avoid draining water from infected fields to uninfected fields.
  • Spray copper hydroxide 400-500 grams per acre when 30%-50% damage of leaf area (Veg) or 20% damage of flag leaf area (Heading)
  • WHO Class II (Moderately hazardous). Apply a maximum of three times per season
AUTHOR(S): Plant Protection Division, Myanmar

CREATED/UPDATED: June 2014
PRODUCED BY: Plantwise

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