Agricultural crops :: Oilseeds :: Safflower
Wilt: Fusarium oxysporum f.sp.carthami
Symptom
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Lesion at soil line is the first symptom noticed which extends inside and affects the vascular system.
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Symptoms become distinct when plants are in 6-10 leaf stage as yellowing of leaves followed by wilting, epinasty and vascular browning.
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Infected plants produce small sized flower heads which are partially blossomed.
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The fungus survives in seed, soil and in infected debris.
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The disease is severe in acidic soils with high nitrogen and warm moist weather.
Management
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Crop rotation
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Water stress should be avoided.
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Seed treatment Pseudomonas fluorescens recorded the least wilt-disease incidence.
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Soil application of Trichoderma harzianum @2.5 kg/ha. T. harzianum and T. viride seed treatment @ 10 g/kg seed.
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Seed treatment with Carbendazim (ST)
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Seed treatment with Captan or Carbendazim @0.1-0.2% 3 g/kg.
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Seed treatment with Trichoderma viride mutant and Carbendazim (0.01% a.i.) and soil.
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Application of potash (15 kg/ha) at the recommended dose reduced wilt incidence besides giving higher yields of safflower.
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