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Fusarium wilt of chrysanthemum

Fusarium wilt of chrysanthemum is caused by Fusarium oxysporum f.sp. chrysanthemi (and f.sp. tracheiphilum); the pathogen colonizes xylem, causing wilt that often appears on one side first while roots look healthy.

Identification and biology

  • Pathogen: Fusarium oxysporum f.sp. chrysanthemi
  • Biocontrol: Trichoderma viride 2.5 kg/ha at 30/60/90 DAP reduces wilt to ~12.6%
  • Fungicides: carbendazim 0.1%; benomyl + captafol rotation
  • Symptom: one-sided wilt; xylem blockage; roots may look healthy

Management

ICAR-IIHR and SAU trials show soil application of Trichoderma viride at 2.5 kg talc-based formulation/ha at 30, 60 and 90 DAP reduces incidence to ~12.6% versus 88.9% in untreated controls. Chemical management uses carbendazim 0.05-0.1% drench, with benomyl + captafol rotation. Cultural measures include destroying debris, avoiding excess irrigation, and crop rotation.

See also: Marigold Crop, Chrysanthemum Crop, Jassids Sucking Pests Floriculture, Jasmine Jaji Virajaji, Jasmine Mallepoolu Sambac, Spodoptera Marigold Flower Borer.

References

  1. Wilt of chrysanthemum - NHB factsheet. https://nhb.gov.in/pdf/flowers/chrysanthemum/chr002.pdf
  2. Management of wilt disease of chrysanthemum - Phytojournal. https://www.phytojournal.com/archives/2021.v10.i1.13739/