Rice Bacterial Leaf BlightIdentification & Treatment Guide 2026
Xanthomonas oryzae pv. oryzae · Family: Xanthomonadaceae
Rice bacterial leaf blight (Xanthomonas oryzae pv. oryzae) causes water-soaked yellow-green lesions advancing from leaf tips that dry to grayish-white. Yield losses reach 20-50%. Manage with resistant varieties (Xa4, Xa21 genes), balanced nitrogen, avoid flooding damage to leaves, and copper sprays. The kresek phase can kill young seedlings entirely.
Scan This Plant NowQuick Diagnosis
highRice Bacterial Leaf Blight
- Affects
- leavesleaf sheaths
- Peak Season
- Rainy season; worst during warm (25-34°C), humid, windy weather with frequent storms
- Spread Risk
- Fast
- Spread By
- Rain splash, wind-driven rain, irrigation water, infected seed, bacterial ooze from leaf hydathodes
Think your plant has Rice Bacterial Leaf Blight?
Upload a photo and our AI will diagnose it in seconds — with treatment recommendations.
Scan this crop with our free app
Upload a photo → AI diagnosis in seconds.
Symptoms: What does Rice Bacterial Leaf Blight look like?
Visual identification guide — tap each stage for details
Water-soaked lesions at leaf tips and margins
Water-soaked, yellowish-green lesions appear at leaf tips and along margins where bacteria enter through hydathodes. Milky bacterial ooze may be visible as tiny droplets on lesion surfaces in early morning.
Expanding grayish-white lesions along leaf
Lesions extend along the leaf, advancing from tips toward the base. Initially yellow-green, they dry to characteristic grayish-white or straw-colored with wavy margins. Entire leaves may become affected.
Kresek (wilting) and severe yield loss
The kresek phase occurs when bacteria invade the xylem of young seedlings (within 3 weeks of transplanting), causing rapid wilting and death of the entire plant. Leaf blight phase on mature plants causes 20-50% yield reduction.
Share this guide with a fellow farmer
Available offline · Free forever
Diagnose Rice Bacterial Leaf Blight right now.
Point your camera at any leaf. Get a diagnosis in seconds — even without internet. Works in the field, in the forest, anywhere.
New on Google Play
