Armillaria root rot threatens Cameroon's Penja pepper (Piper nigrum L.)

Petchayo Tigang Sandrine, Tchotet Tchoumi James Michel, Roux Jolanda, Nguefack Julienne, Begoude Boyogueno Aime Didier, Mbenoum Michael, Mfegue Crescence Virginie, Nyassé Salomon, Ndoumbe Nkeng Michel, Ten Hoopen Gerben Martijn. 2020. Armillaria root rot threatens Cameroon's Penja pepper (Piper nigrum L.). Tropical Plant Pathology, 45 : 434-543.

Quartile : Q3, Sujet : PLANT SCIENCES

Résumé : Penja pepper (Piper nigrum) produced in Cameroon has long been recognized for its exceptional organoleptic quality. The pepper vine is grown using a support tree (Spondias mombin) in Cameroon. A root disease is associated with plant deaths in both plants. The disease symptoms are characterized by collar cracking and gummosis and the disease was tentatively identified as Armillaria root rot. In this work the extent of the problem was characterized by surveying 35 farms in Cameroon. Samples were taken from diseased support trees and pepper vines. Support trees exhibiting typical symptoms were found in approximately one third of the surveyed farms. In these farms, disease incidence and Pepper vine mortality ranged from 1.3 to 50% and 1.2 to 87.7%, respectively. Analysis of the ribosomal internal transcribed spacer region (ITS) locus suggested that the isolates collected from S. mombin and P. nigrum are most likely, which is a first for both hosts, represented by Armillaria camerunensis (Henn.) Volk & Burdsall, a fungus previously associated with declining cacao trees in Cameroon. Given the increasing demand for Penja pepper and the great damaging potential of this root rot, research on management strategies should be prioritized.

Mots-clés Agrovoc : Piper nigrum, pourriture des racines, maladie fongique

Mots-clés géographiques Agrovoc : Cameroun

Mots-clés complémentaires : Armillaria camerunensis, Spondias mombin

Mots-clés libres : Armillaria camerunensis, Slow decline, Spondias mombin

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Petchayo Tigang Sandrine, IRAD (CMR) - auteur correspondant
• Tchotet Tchoumi James Michel, University of Pretoria (ZAF)
• Roux Jolanda, University of Pretoria (ZAF)
• Nguefack Julienne, Université de Yaoundé 1 (CMR)
• Begoude Boyogueno Aime Didier, University of Pretoria (ZAF)
• Mbenoum Michael, IRAD (CMR)
• Mfegue Crescence Virginie, IRAD (CMR)
• Nyassé Salomon, IRAD (CMR)
• Ndoumbe Nkeng Michel, IRAD (CMR)
• Ten Hoopen Gerben Martijn, CIRAD-BIOS-UPR Bioagresseurs (TTO) ORCID: 0000-0003-2133-3130

Source : Cirad-Agritrop (https://agritrop.cirad.fr/595863/)

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