Effects of crop management on the incidence and severity of fungal diseases in sunflower

Philippe P. Debaeke (1, 2) , Emmanuelle Mestries (3) , Myriam Desanlis (1, 2) , Celia Seassau (1, 2)

1 AGIR - AGroécologie, Innovations, teRritoires
2 UT3 - Université Toulouse III - Paul Sabatier
3 Terres Inovia

The main fungal diseases of sunflower are black stem disease (Phoma macdonaldii), downy mildew (Plasmopara halstedii), Phomopsis stem canker (Phomopsis helianthi) and white mold (Sclerotinia sclerotiorum). Thanks to genetic improvement, the main method of disease control is the use of varieties with good tolerance or resistance. Crop management includes a set of measures to reduce the risk of fungal attacks and to limit the impact of these attacks on the crop. Cultural control is based on prevention (e.g. by crop rotation), escape (e.g. by adjusting the sowing date) or the promotion of microclimatic conditions unfavorable to pathogens (through control of vegetative growth), all of which have been shown to be effective. A suitably timed combination, organized at the regional level, of cultural, genetic, chemical and biological control methods is the key to an effective, integrated and sustainable control of diseases in sunflower.

Mots clés: sunflower; fungal diseases; phomopsis helianthi

Mots clés: crop management; phoma macdonaldii

Domaines: Sciences du Vivant [q-bio]; Sciences de l'Homme et Société; Sciences de l'environnement

Philippe P. Debaeke, Emmanuelle Mestries, Myriam Desanlis, Celia Seassau. Effects of crop management on the incidence and severity of fungal diseases in sunflower. Sunflowers: growth and development, environmental influences and pests/diseases, Nova Science Publishers, 2014, Botanical Research and Practices, 978-1-63117-348-6. ⟨hal-02801511⟩