Bacterial Leaf Blight of Sugarcane

  • Symptoms

  • Trigger

  • Biological Control

  • Chemical Control

  • Preventive Measures

Bacterial Leaf Blight of Sugarcane

Acidovorax avenae

Bacteria


In a Nutshell

  • Leaves develop watery-green stripes along midrib and base of leaf.
  • Stripes then spread across the whole leaf and become reddish in colour.
  • Leaves wilt and rot, producing a foul odour.
  • Stems form large cavities.
  • Reduced root system.
  • Whole plant growth is stunted.

Hosts

Sugarcane

Symptoms

The disease occurs mostly on young and middle-aged leaves. Long, narrow, uniform and watery-green stripes occur first near the midrib and the base of leaf blades. At later stages of the disease, stripes spread across the whole leaf, coalesce and become first light- and then dark-red in colour (necrotic). Leaves wilt, rot and emit a strong, unpleasant odour. As the rotting progresses into the stem, large cavities form within the internodes. At later stages of the disease, tops and inflorescences frequently break off and fall to the ground, this symptom is called top rot.

Trigger

The bacteria prefers high humidity and high temperatures. The primary transmission takes place through soil and diseased setts, while the secondary transmission happens through air, rain splash and soil

Biological Control

Sorry, we don't know of any alternative treatment against Acidovorax avenae . Please get in touch with us in case you know of something that might help to fight this disease. Looking forward hearing from you.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. To avoid primary infection a treatment of the seeds with the appropriate fungicide for 15 to 20 minutes could be conducted.

Preventive Measures

Grow resistant varieties. Collect healthy planting material from the seed nursery. Implement wide crop rotation with green manure crops. Improve your drainage system to reduce the incidence of the disease. Fertilize moderately with nitrogen.