First Report of Fusarium pallidoroseum (Cooke) Sacc. causing Wilt Disease in Coriander (Coriandrum sativum L.)

Author: D.G. Pithiya and K.K. Kanzaria

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Abstract

Coriander (Coriandrum sativum L.) is a significant annual spice crop affected by several diseases. To date, no documentation exists regarding the presence of Fusarium pallidoroseum (Cooke) Sacc. on coriander. However, a wilted coriander plant was observed due to F. pallidoroseum at the Jambuvadi Farm of Junagadh Agricultural University, Junagadh during the year 2022-23. The pathogen was identified by the Indian Type Culture Collection (ITCC), IARI, New Delhi (ID No. 11,782.22). Studies regarding pathogenicity, symptomatology and cultural and morphological characteristics were carried out. The pathogenicity test of the fungus was established by following Koch’s postulates using soil inoculation method. The disease occurs at any crop growth stage. Symptoms at the seedling stage show drooping of the petiole and leaves followed by collapse of the seedlings, which lodge over the surface of the soil. While at flowering stage, the initially affected plant showed yellowing and drooping of the lower leaves which extended upward followed by withering and outright mortality of plant. The vertically split open affected plant’s root shows brown vascular discoloration. The fungal colony grown on PDA medium initially exhibited profuse cottony white aerial mycelium, transitioning to creamy white over ten days of incubation at 28 ± 1°C, reaching a diameter of 90 mm. A reddish-brown pigmentation was observed on the back side of the Petri plate containing grown up culture. Microscopic examination revealed the presence of macroconidia, which were sickle-shaped and 3-4 septate. Microconidia were small and single or bi-celled. Chlamydospores were observed in twenty-day-old culture, appearing rough to smooth-walled, nearly spherical in shape

Keywords

Coriander, Fusarium pallidoroseum, wilt, pathogenicity, symptomatology, cultural and morphological character

Conclusion

Based on the current investigation, it can be concluded that coriander (Coriandrum sativum L.) is also a host of Fusarium pallidoroseum (Cooke) Sacc., which causes wilt disease under natural conditions.The review of the literature showed that it is a new record on coriander from India.The disease occurs at any stage of crop growth, resulting in the outright mortality of the plant. The longitudinally split open affected plant’s root shows brown vascular discoloration. The pathogen is soil-borne in nature and produces chlamydospores, macroconidia and microconidia

References

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How to cite this article

D.G. Pithiya and K.K. Kanzaria (2024). First Report of Fusarium pallidoroseum (Cooke) Sacc. causing Wilt Disease in Coriander (Coriandrum sativum L.). Biological Forum – An International Journal, 16(7): 29-32.