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