Achour Amiri

Postdoctoral Research Scientist


Achour AmiriEmail: aamiri@clemson.edu
Office: 864 656 5742

Department:
Entomology, Soils, and Plant Sciences

Location:
Clemson University, Clemson SC 29634

Education:
Dipl. Ing. Agr. Sci. National Institute of Agriculture, Algeria, 1993
M.S. Plant Pathology and Bio-engineering. Gembloux Agricultural University, Belgium, 2000
Ph.D. Plant Pathology. University of Pierre and Marie Curie, Paris-France, 2004

Research interest:
Peach brown rot fungicide resistance management. Peach production is an important part for local economical development in the southeast region of the United States. Monilinia fructicola, the causal agent of brown rot disease is the most important pathogen on peach in preharvest and constitutes a major treat for peach production sustainability in the south. The current control strategy relies on the alternation of fungicides from two chemical families: the sterol demethylation inhibitor (DMI) and the quinone outside inhibitor (QoI) fungicides, and in some marginal situations on the spray of benzimidazole (BZI) fungicides. My current work aims to develop a simple and reliable technique for rapid screenings for resistant M. fructicola populations to the different key fungicides. A bioassay consisting of lipbalm tubes containing an agar medium amended with a fungicide offered similar accuracy as the traditional Petri dish, and was faster in assessing fungicide sensitivity (Link to Amiri et al .2008). This newly developed assay was further validated for a fast determination of fungicide sensitivity in M. fructicola field isolates (Amiri et al., 2009) with the final objective of making the method available to crop consultants, who usually have no access to a research laboratory. We hope this new method will help growers to rapidly know the sensitivity profiles occurring in their orchards and therefore, take decisions for rational and environmentally-friendly spray programs. Oak root rot disease management. The `Oak root rot’ know also as Armillatia root rot (ARR) disease is a devastating peach disease caused by Armillaria tabescens in the southeastern United States. This telluric fungal species can survive for several years in the soil, infect roots and spread by contact between roots of diseased trees and roots of healthy trees, resulting in a premature orchard decline and peach tree mortality. Propiconazole, a DMI fungicide was found to control Armillaria sp. in vitro and to move downward to the roots following intravascular trunk infusion in fall and spring (Amiri et al., 2008). The further objective is to assess the persistence of propiconazole in the roots and evaluate its efficacy in controlling ARR under field conditions. The final aim is to provide a practical and cost-effective tool intended to target localized Armillaria infection centers which should lead to reduced chemical input.

Publications:
Amiri A, Scherm H, Brannen PM., Schnabel G. 2008. Laboratory evaluation of three rapid, agar-based assays to assess fungicide sensitivity in Monilinia fructicola. Plant Disease. 9: 415-420.

Luo C.X, Cox K.D, Amiri A, and Schnabel, G. 2008. Occurrence and Detection of DMI Resistance-Associated Genetic Element ‘Mona’ in Monilinia fructicola. Plant Disease. 92:1099-1103.

Amiri A, Bussey K.E, Riley M.B, and Schnabel G. 2008. Propiconazole inhibits Armillaria tabescens in vitro and translocates into peach roots following trunk infusion. Plant Disease. 92:1293-1298.

Amiri A, Dugas R, Pichot A.L, Bompeix G. 2008. In vitro and in vivo activity of eugenol oil (Eugenia caryophylata) against four important postharvest apple pathogens. International Journal of Food Microbiology. 126:13-19.

Brannen P.M, Hotchkiss M, Reilly C, Amiri. A. 2007. Evaluation of fungicide programs to manage DMI-resistant Monilinia fructicola population on peach, 2007. Plant Disease Management Reports 2:STF003.

Brannen P.M, Hotchkiss M, Reilly C, Amiri. A. 2006. Evaluation of fungicide programs to manage DMI-resistant Monilinia fructicola in a late-ripening peach, 2006. Plant Disease Management Reports 1:STF002

Brannen P.M, Hotchkiss M, Reilly C, Amiri. A. 2006. Evaluation of fungicide programs to manage DMI-resistant Monilinia fructicola in early-ripening peach, 2006. Plant Disease Management Reports 1:STF003

Amiri A, Bompeix. G. 2005. La pourriture bleue (Penicillium spp.) des pommes en pré et post-récolte. Phytoma la Défense des végétaux 579: 27-31.

Amiri A, Bompeix G. 2005. Wound detection on apple and pear fruit surfaces using sulphur dioxide. Postharvest Biology and Technology 36: 51-59.

Amiri A, Cholodowski D, Bompeix G. 2005. Adhesion and germination of waterborne and airborne conidia of Penicillium expansum to apple and inert surfaces. Physiological and Molecular Plant Pathology 67: 40-48.

Amiri A, Bompeix G. 2005. Diversity and population dynamics of Penicillium spp. on apple in pre and postharvest environments: consequences for decay development. Plant Pathology 54:74-81.