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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal Plant pathology unit - INRA AVIGNON

Pathologie vegetale

Zone de texte éditable et éditée et rééditée

LACROIX Christelle

Research scientist, MISTRAL lab



LACROIX Christelle

Unité de Recherches de Pathologie Végétale


Domaine St Maurice BP 94
67, allée des chênes
CS 60094
F84143 Montfavet cedex

Tel : 33 (0)



My publications in the open archive HAL INRAE



My research focuses on the role of biotic and abiotic parameters on the distribution, the emergence and the severity of plant Emerging Infectious Diseases (EIDs). My research spans multiple disciplines including disease ecology and plant pathology and is based on field and experimental approaches. My activities include the implementation of necessary tools to study complex ecological interactions, and aims at producing fundamental knowledge while contributing to the development of field applications through the transfer to and collaboration with field partners.

 The overall goal of my main research projects is to contribute to design better management and surveillance strategies of plant EIDS. I base my research on various model systems corresponding to two identically named diseases, i.e. bacterial canker, caused by several strains from the Pseudomonas syringae complex on perennial fruit trees (e.g. kiwifruit and apricot) and by Clavibacter michiganensis susbp. michiganensis (Cmm) strains in tomato crops.

The specific questions I ask range over multiple scales:

i) improving the diagnostic of crop health and the study of factors that drive disease severity under conditions of multiple biotic and abiotic stresses from individual hosts to landscape scales,

Bacterial canker on kiwifruit, caused by several strains from the Pseudomonas syringae complex

ii) producing a better understanding of the role of wild hosts within agriculture (i.e. orchard ground covers) as potential reservoirs of pathogens,

Ground cover in between tree rows in a kiwifruit orchard

Ground cover in between tree rows in a kiwifruit orchard


iii) analyzing the structure and diversity of plant micro-organisms populations in various substrates and contexts (e.g. plant samples in orchards, water that supports microbial dissemination in a river basin),

Analyzing the structure and diversity of plant micro-organisms populations in various substrates and contexts

Click on the figure to enlarge

iv) designing innovative and field friendly tools for in site detection of pathogens to be used as part of integrated pest management strategies.

Tomato plants affected by bacterial canker disease

Tomato plants affected by bacterial canker disease

Example of positive/negative result of a potential in-field detection tool of Cmm

Example of positive/negative result of a potential in-field detection tool of Cmm