Epidemiology of Monilinia laxa, the causal agent of blossom blight in almond orchards within the Ebro Valley.

Background: Almond blossom blight, caused by Monilinia spp., is a notable fungal disease associated with intensified crop management practices. In this study, we aimed to investigate the epidemiology of Monilinia spp.

Modeling the Airborne Inoculum of to Optimize Fungicide Programs Against Almond Red Leaf Blotch.

Red leaf blotch (RLB) of almond, caused by the ascomycete , is a severe foliar disease endemic in the Mediterranean Basin and Middle East. Airborne ascospores of were monitored from 2019 to 2021 in two almond orchards in Lleida, Spain, and a Bayesian beta regression was used to model its seasonal dynamics. The selected model incorporated accumulated degree-days (ADD), ADD considering both vapor pressure deficit and rainfall as fixed effects, and a random effect for the year and location.

Susceptibility of Almond () Cultivars to Twig Canker and Shoot Blight Caused by .

Twenty-five almond cultivars were assessed for susceptibility to , causal agent of twig canker and shoot blight disease. In laboratory experiments, growing twigs were inoculated with four isolates. Moreover, growing shoots of almond cultivars grafted onto INRA 'GF-677' rootstock were used in 4-year field inoculations with one isolate.

Cultivar Susceptibility and Environmental Parameters Affecting Symptom Expression of Red Leaf Blotch of Almond in Spain.

Red leaf blotch (RLB) of almond, caused by , is an important foliar disease of this nut tree in the Mediterranean basin and Middle East regions. In recent years, the incidence of this disease has increased in Spain, corresponding to increases in the area of newly planted orchards and the use of susceptible cultivars. In 2009, an experimental orchard including 21 almond cultivars was planted at Les Borges Blanques, Lleida, in northeastern Spain.

Inoculum and Infection Dynamics of in Almond Orchards in Spain.

Red leaf blotch (RLB) disease of almond, caused by , is an important foliar disease in most production regions of the Mediterranean basin and the Middle East because severe infections may cause a premature defoliation of the tree. Some key aspects on the epidemiology of . were studied in multiyear trials in two almond-growing regions in Spain, which included the seasonal development of perithecia and production and germination of ascospores along with the disease incubation and plant infectivity periods.