Relation entre les symptômes de fusariose de l'épi et la perte de rendement chez le blé tendre

Abstract

Fusarium roseum var culmorum / blé / rendement / cultivar Summary — Relationship between head blight symptoms of Fusarium roseum var culmorum and yield losses in wheat. Four winter wheat cultivars were inoculated in field tests by Fusarium roseum var culmorum over a 4-yr period. Several spore concentrations of the inoculum were used each year. The severity of the disease was evaluated using the number of damaged spikelets at the early dough growth stage and the percentage of visually infected seeds at harvest. Yield and 1 000 grain weight losses were measured with reference to an uninoculated control. A significant correlation was found between the number of damaged spikelets and the number of visually infected seeds together with an effect of the variety and the year. On a linear basis, because of a weak year effect, the decrease in 1 000 grain weight is better predicted using the number of visually infected seeds than the number of damaged spikelets. There is a trend for non-linear response curves for 2 varieties. The use of field evaluation of severity of the disease and tolerance of varieties are discussed.Fusarium roseum var culmorum / wheat / yield / cultivar

Characterisation of kernel resistance against Fusarium infection in spring wheat by baking quality and mycotoxin assessments

“…The inoculum consisted of a mixture of 20 F. culmorum isolates from Switzerland grown for 15 days on oat kernels, dried and ground as described by Saur and Benacef (1993). Each plot was inoculated separately at the beginning of flowering of the variety.…”