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INRA
24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal Plant pathology unit - INRA AVIGNON

Pathologie vegetale

Zone de texte éditable et éditée et rééditée

Biological control

Development of biological control agents and durability of biocontrol

The MISTRAL team has a strong experience in selection of biological agents against plant pathogens. Diverse biocontrol agents (Bacillus subtilis, Fusarium sp., Streptomyces sp., plant extracts of Reynoutria sacchalinensis, chitosan) were tested against Botrytis cinerea and Oïdium neolycopersici. Results have shown the efficacy of  Microdochium dimerum to protect the pruning wounds on tomato plants grown under shelters.

 

Our ongoing studies are focused on the durability of efficacy of biological agents against plant pathogens. Although the capacity of many plant pathogens to develop resistance to chemical pesticides or to overcome varietal resistance is well-known, only few studies have explored their ability to potentially overcome the effect of biocontrol agents and the possible consequences for their field efficacy. The potential of Botrytis cinerea to overcome the efficacy of biological agents was investigated during a thesis defended in 2009. Actually, our main activities concern an other plant pathogen fungus, Sclerotinia sclerotiorum.

Spores of Botrytis cinerea

Spores of Botrytis cinerea

© INRA PACA Avignon

Sclerotium of Sclerotinia sclerotiorum

Sclerotium of Sclerotinia sclerotiorum

© INRA PACA Avignon

Oïdium neolycopersici on tomato

Powdey mildew on tomato

© INRA PACA Avignon

Publications - Plant pathology - Inra Paca Avignon

Reviews

  • Andrivon, D., Bardin, M., Bertrand, C., Brun, L., Daire, X., Decognet, V., Fabre, F., Gary, C., Grenier, A.-S., Montarry, J., Nicot, P., Reignault, P., Tamm, L. (2018). Can organic farming manage without copper? Collective scientific expert report (ESCo). FRA : Inra - DEPE. 185 p. INRA website
  • Bardin, M., Ajouz, S., Comby, M., Lopez-Ferber, M., Graillot, B., Siegwart, M., Nicot, P. C. 2015. Is the efficacy of biological control against plant diseases likely to be more durable than that of chemical pesticides?. Frontiers in Plant Science, 6, 566. DOI : 10.3389/fpls.2015.00566https://prodinra.inra.fr/record/319263
  • Bardin, M., Nicot, P. C. (2018). Is the development of resistance to biological control among plant pathogens possible?. IOBC WPRS Bulletin, 133, 124-126. https://prodinra.inra.fr/record/428037
  • Köhl, J.,  Postma, J. Nicot, P., Ruocco, M., and Blum, B. 2011. Stepwise screening of microorganisms for commercial use in biological control of plant-pathogenic fungi and bacteria. Biological Control, 57, 1-12.
  • Lamichhane, J. R., Bischoff-Schaefer, M., Bluemel, S., Dachbrodt-Saaydeh, S., Dreux, L., Jansen, J.-P., Kiss, J., Köhl, J., Kudsk, P., Malausa, T., Messean, A., Nicot, P. C., Ricci, P., Thibierge, J., Villeneuve, F. 2017. Identifying obstacles and ranking common biological control research priorities for Europe to manage most economically important pests in arable, vegetable and perennial crops. Pest Management Science, 73, 14-21. DOI : 10.1002/ps.4423https://prodinra.inra.fr/record/369130
  • Nicot, P.C. (Editeur) (2011). Classical and augmentative biological control against diseases and pests: critical status analysis and review of factors influencing their success. Zürich (CHE) : IOBC - International Organisation for Biological and Integrated Control of Noxious Animals and Plants, 194 p.