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