Search results for "disease suppression"
showing 3 items of 3 documents
Soil health through soil disease suppression: Which strategy from descriptors to indicators?
2007
International audience; Soil is a component of primary importance in crop production, even if it is often neglected, or only regarded as a physical support for the growth of plants. However, with the increasing societal concerns for the sustainability of agriculture, soil must be considered as a living system. Its quality results from the multiple interactions among physicochemical and biological components, notably the microbial communities, primordial for soil function. Crops are threatened by soil-borne diseases. These are often difficult to control, because of the “hidden” status of the pathogens and also because of the absence, noxiousness or lack of efficacy of chemical treatments. In…
Build up of patches caused by Rhizoctonia solani
2010
Rhizoctonia solani is a complex species that is composed of different anastomosis groups (AG). Although these different AGs show differences in their host ranges, generally R. solani is a phytopathogenic species with a wide spectrum of hosts. It has the ability to grow as a saprotroph, which further complicates its behaviour as a parasite. The losses caused by R. solani are very important and need a sustainable management strategy. The patchy appearance of the disease caused by this pathogen is well-known. The patches show within and between season dynamics. The factors which affect the spread of the disease can be grouped into three main categories: host plant, pathogen and environment. Ho…
Functionnal aspects of biodiversity in relation to plant health
2009
Texte intégral; The most visible impact of human activities on biodiversity concerns species which are part of our cultural heritage but a huge part of the diversity is still hidden, mainly in the ocean, in extreme environments and of course in the soil. Although some estimations can be proposed, they are all considered as under-evaluations of the putative number of taxa that could be present on (in?) the planet Earth. Despite it is not yet known, this biodiversity contributes to different services through the functioning of ecosystems, and thus influences the sustainability of these ecosystems. This was the case for instance when the unsuspected major roles of the archeabacteria in the bi…