Soybean Frog eye leaf spot

Soybean Frog eye leaf spotCercospora sojina

Symptom:
  • Light to dark grey or brown areas varying from specks to large blotches appears on seeds.
  • The disease primarily affects foliage, but, stems, pods and seeds may also be infected.
  • Leaf lesions are circular or angular, at first brown then light brown to ash grey with dark margins.
  • The leaf spots may coalesce to form larger spots.
  • When lesions are numerous the leaves wither and drop prematurely.
  • Lesions on pods are circular to elongate, light sunken and reddish brown.
Management:
  • Use healthy or certified seeds.
  • Rotate soybean with cereals.
  • Completely remove plant residue by clean ploughing the field soon after harvest.
  • Seed treatment with Thiram + Carbendazim (2:1) @ 3g/kg seed.
  • Spray Mancozeb @ 2.5g/lit or Carbendazim 1g/lit.

 

Source-

  • TamilNadu Agritech Portal