Dispersal of conidia of Fusicladium eriobotryae and spatial patterns of scab in loquat orchards in Spain

González‐Domínguez, Elisa; Rossi, Vittorio; Michereff, Sami Jorge; García‐Jiménez, J.; Armengol, Josep

doi:10.1007/s10658-014-0439-0

Cited by 18 publications

(14 citation statements)

References 36 publications

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“…Pseudothecia of V. carpophila were also observed in affected detached leaves of apricot (Fisher, 1961 ), but their epidemiological role is unknown, and the conidia of V. carpophila overwintering in affected twigs are commonly considered the primary inoculum (Lan and Scherm, 2003 ; Lalancette et al, 2012 ). Ascocarps have never been found in nature for F. effusum, F. oleagineum, F. eriobotryae , or F. pyracanthae ; conidia are considered the only form of primary inoculum for these species (Raabe and Gardner, 1972 ; Gottwald and Bertrand, 1982 ; Graniti, 1993 ; González-Domínguez et al, 2014b ).…”

Section: Venturia Species As Fruit Tree Pathogensmentioning

confidence: 99%

“…Dispersal of F. eriobotryae conidia was also closely associated with rain. More than 90% of the conidia were collected during rainy periods, and 0.2 mm of rain was sufficient to trigger a dispersal event (González-Domínguez et al, 2014b ). A strong aggregation of loquat scab lesions between and within loquat trees also confirmed that F. eriobotryae conidia were mainly splash dispersed (Madden, 1992 ; González-Domínguez et al, 2014b ).…”

Section: Venturia Species As Fruit Tree Pathogensmentioning

confidence: 99%

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Biology and Epidemiology of Venturia Species Affecting Fruit Crops: A Review

2017

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The fungal genus Venturia Sacc. (anamorph Fusicladium Bonord.) includes plant pathogens that cause substantial economic damage to fruit crops worldwide. Although Venturia inaequalis is considered a model species in plant pathology, other Venturia spp. also cause scab on other fruit trees. Relative to the substantial research that has been conducted on V. inaequalis and apple scab, little research has been conducted on Venturia spp. affecting other fruit trees. In this review, the main characteristics of plant-pathogenic species of Venturia are discussed with special attention to V. inaequalis affecting apple, V. pyrina affecting European pear, V. nashicola affecting Asian pear, V. carpophila affecting peach and almond, Fusicladium oleagineum affecting olive, F. effusum affecting pecan, and F. eriobotryae affecting loquat. This review has two main objectives: (i) to identify the main gaps in our knowledge regarding the biology and epidemiology of Venturia spp. affecting fruit trees; and (ii) to identify similarities and differences among these Venturia spp. in order to improve disease management. A thorough review has been conducted of studies regarding the phylogenetic relationships, host ranges, biologies, and epidemiologies of Venturia spp. A multiple correspondence analysis (CA) has also been performed on the main epidemiological components of these Venturia spp. CA separated the Venturia spp. into two main groups, according to their epidemiological behavior: the first group included V. inaequalis, V. pyrina, V. nashicola, and V. carpophila, the second F. oleagineum and F. eriobotryae, with F. effusum having an intermediate position. This review shows that Venturia spp. affecting fruit trees are highly host-specific, and that important gaps in understanding the life cycle exist for some species, including V. pyrina; gaps include pseudothecia formation, ascospore and conidia germination, and mycelial growth. Considering the epidemiological information reviewed, this paper shows that the use of Mills tables to predict infection periods should be avoided for Venturia spp. other than V. inaequalis.

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Section: Venturia Species As Fruit Tree Pathogensmentioning

confidence: 99%

Section: Venturia Species As Fruit Tree Pathogensmentioning

confidence: 99%

Biology and Epidemiology of Venturia Species Affecting Fruit Crops: A Review

2017

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“…Briefly, fruits from four shoots of each of 46 loquat trees were assessed weekly, and disease incidence was expressed as the percentage of fruits with scab symptoms. The disease incidence was lower in 2011 than 2012, with 27.3% and 97.6% of fruits affected by loquat scab at harvest, respectively [7]. This difference in disease incidence may be related to the fact that the orchard was treated with fungicides for scab control in 2010 but not in 2011 or 2012.…”

Section: Model Validationmentioning

confidence: 96%

“…Details on these data have been previously published [7]. Briefly, fruits from four shoots of each of 46 loquat trees were assessed weekly, and disease incidence was expressed as the percentage of fruits with scab symptoms.…”

Section: Model Validationmentioning

confidence: 99%

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Development and Validation of a Weather-Based Model for Predicting Infection of Loquat Fruit by Fusicladium eriobotryae

2014

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A mechanistic, dynamic model was developed to predict infection of loquat fruit by conidia of Fusicladium eriobotryae, the causal agent of loquat scab. The model simulates scab infection periods and their severity through the sub-processes of spore dispersal, infection, and latency (i.e., the state variables); change from one state to the following one depends on environmental conditions and on processes described by mathematical equations. Equations were developed using published data on F. eriobotryae mycelium growth, conidial germination, infection, and conidial dispersion pattern. The model was then validated by comparing model output with three independent data sets. The model accurately predicts the occurrence and severity of infection periods as well as the progress of loquat scab incidence on fruit (with concordance correlation coefficients >0.95). Model output agreed with expert assessment of the disease severity in seven loquat-growing seasons. Use of the model for scheduling fungicide applications in loquat orchards may help optimise scab management and reduce fungicide applications.

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