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Istituto Agronomico Mediterraneo di Bari (IAMB) 2005

Assessment of the sanitary conditions of certified citrus nurseries production in Souss Massa Valley (Morocco)

El Aimani, Ali

Titre : Assessment of the sanitary conditions of certified citrus nurseries production in Souss Massa Valley (Morocco)

Auteur : El Aimani, Ali

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM)

Diplôme : Master of science : Integrated pest management of Mediterranean fruit crops (2005)

Résumé
Biological, serological and molecular assays were applied and the basic material proved to be free from the virus and virus-like pathogens tested (CTV, CPsV, CVV, oak leaf pattern agent, CEVd, CCaVd, S. citri). Furthermore, the survey of 1054 citrus trees, carried out around the nurseries using DTBIA test, indicated an infection rate of 10% for CPsV and 2% for CVV, whereas CTV and S. citri were not reported. The inoculum density (ID) of Phytophthora spp. was determined in two rootstocks (Citrange Carrizo and sour orange) and in the nursery soil. In July, the ID was also estimated in different components of the soil mixture and in water. High values of ID and root infection (RI) were observed in July and the sour orange rootstock was more tolerant to Phytophthora root rot than Carrizo citrange. Only P. nicotianae was identified by molecular assay (PCR) thus demonstrating that it was the causal agent of Phytophthora root rot.

Mots-clés : CITRUS PLANT CERTIFICATION BIOASSAYS PLANTING STOCK PHYTOPHTHORA PHYTOPHTHORA NICOTIANAE PLANT VIRUSES MOROCCO

Présentation (IAMB Library)

Page publiée le 20 juin 2014, mise à jour le 6 décembre 2017