Journal of Plant Pathology

, Volume 101, Issue 4, pp 1195–1197 | Cite as

Symptomless reaction of Sechium edule (Jacq.) Sw. to Verticillium dahliae Kleb.

  • Giovanni BubiciEmail author
  • Maria Isabella Prigigallo
  • Valentino Poliseno
Short Communication


Chayote (Sechium edule, fam. Cucurbitaceae) is not reported as a host of Verticillium dahliae. In an olive orchard intercropped with horticultural crops and infested by Verticillium dahliae, chayote did not show Verticillium wilt symptoms over three years (2015–2017). Hence, we hypothesized that chayote is not a V. dahliae host. Using a V. dahliae isolate obtained from a wilted eggplant located in that field, we carried out a pathogenicity test on two chayote varieties, one with spiny fruits and another with non-spiny fruits (10 plants each). Eggplant, tomato and ‘Carosello’ ecotype (Cucumis melo), all susceptible to the disease, were included as positive controls. After four months in the greenhouse, chayote plants did not show Verticillium wilt symptoms, which occurred in the control plants since 4–6 weeks after planting. From chayote roots, isolation on PDA did not yield colonies of V. dahliae, but PCR assays from some plants were positive. This indicated very limited colonization of roots by V. dahliae, which is known to occur even in resistant or symptomless responses. In conclusion, we demonstrate the symptomless response of chayote to V. dahliae, while assessment of the non-host response needs further pathogenicity test with V. dahliae isolates from diverse plant species.


Chayote Verticillium wilt Host range 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical responsibilities of authors

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Società Italiana di Patologia Vegetale (S.I.Pa.V.) 2019

Authors and Affiliations

  1. 1.Istituto per la Protezione Sostenibile delle PianteConsiglio Nazionale delle RicercheBariItaly
  2. 2.Dipartimento di Scienze del Suolo, della Pianta e degli AlimentiUniversità degli Studi di Bari ‘Aldo Moro’BariItaly

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