| Titre : |
Effet de l'architecture contrastée du blé et des caractérisques de la pluie sur la dispersion par éclaboussment des pycnidiospores de Mycosphaerella graminola en milieu contrôlé dans des associations variétales |
| Type de document : |
texte imprimé |
| Auteurs : |
Pauline Lusley, Auteur |
| Année de publication : |
2014 |
| Importance : |
51 p. + annexes |
| Format : |
Version papier + Cd |
| Note générale : |
Mémoire de projet ingénieur
Lieu de stage : INRA environnement et grandes cultures 78850 Thiverval Grignon
Non confidentiel
Président du jury :Christophe Gangneux |
| Langues : |
Français (fre) |
| Mots-clés : |
Septoriose pluie dispersion éclaboussement blé variété association variétale architecture proportion inoculum rang |
| Résumé : |
To preserve food security in the current century, agricultural
production turns to favor inputs, in particular pesticides, to fight
bio-agressors. In a new context of climate change, agricultural
production modes should move towards a limited dependance
on pesticides.
The study carried out in this work deals with a fungal disease of
wheat dispersed by rainsplash. This disease named
Mycosphaerella graminicola has significant consequences on
yield losses. This study had several objectives : first observe
the possible effect of canopy structure on the dispersal of
disease, second compare the disease of a mixture with the
same pure varieties, third study the phenomenon of splash by
applying two artificial rain types differing by drop diameters
(1,1mm and 0,6mm).
The results showed an increase of the diseased area in relation
the drop diameter increase and a decrease of disease dispersal
at increasing distances of inoculum source. The comparison
between the three varieties showed differences on leaves area
and leaf insertion heights. The study by leaves floor let us think
that heights of leaf insertion and leaf area have an important
role in droplet interception. Overall, the mixture showed a
positive effect with a decrease of diseased area on the sensible
variety but a light increase of disease on the partially resistant
variety. |
Effet de l'architecture contrastée du blé et des caractérisques de la pluie sur la dispersion par éclaboussment des pycnidiospores de Mycosphaerella graminola en milieu contrôlé dans des associations variétales [texte imprimé] / Pauline Lusley, Auteur . - 2014 . - 51 p. + annexes ; Version papier + Cd.
Mémoire de projet ingénieur
Lieu de stage : INRA environnement et grandes cultures 78850 Thiverval Grignon
Non confidentiel
Président du jury :Christophe Gangneux Langues : Français ( fre)
| Mots-clés : |
Septoriose pluie dispersion éclaboussement blé variété association variétale architecture proportion inoculum rang |
| Résumé : |
To preserve food security in the current century, agricultural
production turns to favor inputs, in particular pesticides, to fight
bio-agressors. In a new context of climate change, agricultural
production modes should move towards a limited dependance
on pesticides.
The study carried out in this work deals with a fungal disease of
wheat dispersed by rainsplash. This disease named
Mycosphaerella graminicola has significant consequences on
yield losses. This study had several objectives : first observe
the possible effect of canopy structure on the dispersal of
disease, second compare the disease of a mixture with the
same pure varieties, third study the phenomenon of splash by
applying two artificial rain types differing by drop diameters
(1,1mm and 0,6mm).
The results showed an increase of the diseased area in relation
the drop diameter increase and a decrease of disease dispersal
at increasing distances of inoculum source. The comparison
between the three varieties showed differences on leaves area
and leaf insertion heights. The study by leaves floor let us think
that heights of leaf insertion and leaf area have an important
role in droplet interception. Overall, the mixture showed a
positive effect with a decrease of diseased area on the sensible
variety but a light increase of disease on the partially resistant
variety. |
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