Factors Affecting Infection and Disease Development on Olive Leaves Inoculated with <i>Fusicladium oleagineum</i>

Viruega, J.R.; Roca, L. F.; Moral, Juan; Trapero, A.

doi:10.1094/pdis-02-11-0126

Cited by 35 publications

(36 citation statements)

References 19 publications

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“…Disease incidence (DI) and disease severity index (DSI) were assessed from 13 days after inoculation (dai) using a 0-8 rating scale (Viruega et al, 2011). Disease assessments were made every 3 days until reaching 100% DSI or until complete fruit contamination by several fungi (species of Alternaria, Fusarium, Mucor, Penicillium or Rhizopus) that impeded additional assessment.…”

Section: Pathogenicity On Detached Olive Fruitsmentioning

confidence: 99%

Phenotypic, molecular and pathogenic characterization of Phlyctema vagabunda, causal agent of olive leprosy

et al. 2017

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Olive leprosy, caused by the fungus Phlyctema vagabunda, is a classic fruit rot disease widespread in the Mediterranean basin. From 2009 to 2013, new disease symptoms consisting of small circular necrotic leaf lesions, coin branch canker and shoot dieback were observed in Spanish and Portuguese olive orchards showing intense defoliation. Phlyctema‐like anamorphs were consistently isolated from leaves and shoots with symptoms. Representative isolates from affected leaves, shoots and fruits were characterized based on morphology of colonies and conidia, optimum growth temperature and comparison of DNA sequence data from four regions: ITS, tub2, MIT and rpb2. In addition, pathogenicity tests were performed on apple and olive fruits, and on branches and leaves of olive trees. Maximum mycelial growth rate ranged between 0.54 and 0.73 mm per day. Conidia produced on inoculated apple fruits showed slight differences in morphology among the representative fungal isolates evaluated. Phylogenetic analysis clustered all of the Phlyctema‐like isolates in the same clade, identifying them as Phlyctema vagabunda. On fruits, influence of wounding, ripening and cultivar resistance was studied, with cv. Blanqueta being the most susceptible cultivar. On branches, a mycelial‐plug inoculation method reproduced olive leprosy symptoms and caused shoot dieback. On leaves, Koch's postulates were fulfilled and the pathogen caused characteristic necrotic spots and plant defoliation. This is the first time that the pathogenicity of P. vagabunda in olive leaves has been demonstrated.

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Section: Pathogenicity On Detached Olive Fruitsmentioning

confidence: 99%

Phenotypic, molecular and pathogenic characterization of Phlyctema vagabunda, causal agent of olive leprosy

et al. 2017

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“…Therefore, the equation parameters estimated for the pooled data were consistent over the different isolates and the equations are supposed to estimate the epidemiological parameters of F. eriobotryae robustly, regardless of the strains (21,23,24,36,38). In the present research, equations which describe the growth, germination, and infection of F. eriobotryae at different weather conditions have been developed, which provided a reasonable fit to the biological processes investigated, as demonstrated by the goodness-of-fit.…”

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confidence: 67%

“…(24,38) whereas, for V. inaequalis, V. nashicola, and y. pyrina, at the optimal temperature of 20°C, scab symptoms appeared after 6, 9, and 9 h, respectively (13,17,33,37). Also for F. effusum, F. oleaginum, and V. nashicola, the development of scab symptoms increased until 48, 96, and 50 h of wetness, respectively (11,17,24,38). For all the above pathogens different from F eriobotryae, symptoms developed also at 25°C.…”

Section: Discussionmentioning

confidence: 99%

Effect of Environmental Factors on Mycelial Growth and Conidial Germination of Fusicladium eriobotryae, and the Infection of Loquat Leaves

et al. 2013

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“…In this case, the EC 50 values did not range as markedly as the EC 50 values in terms of mycelial growth inhibition. The efficacy of copper sulfate has previously been reported under field conditions [15].…”

Section: Discussionmentioning

confidence: 97%

Evaluation of Fungicides and Management Strategies against Cercospora Leaf Spot of Olive Caused by Pseudocercospora cladosporioides

et al. 2020

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Cercospora leaf spot of olive (CLSO), caused by Pseudocercospora cladosporioides, is one of the most important foliar diseases of olives worldwide. This study aimed to evaluate the effect of a wide range of fungicides on mycelial growth and conidial germination of P. cladosporioides in vitro, and to evaluate the effect of several fungicides, application timings and management strategies (conservative and risky) to control CLSO under field conditions. Of the studied fungicides, strobilurin compounds and benomyl were the most effective active ingredients, followed by folpet, captan and maneb, in inhibiting mycelial growth and conidial germination. The pyraclostrobin + boscalid treatment was effective under field conditions, even without the application of supplementary copper. Treatments conducted in October or March were more effective than those conducted in May. Management strategies based on the author's experience reduced copper applications up to 32.0% and 50.0% (conservative and risky strategy, respectively) in comparison to the reduction with the traditional strategy, without increasing CLSO incidence. This work provides useful information about effective formulations against CLSO and a reduction in unnecessary fungicide applications in an effort to implement IPM in olive orchards under Mediterranean conditions.

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Factors Affecting Infection and Disease Development on Olive Leaves Inoculated with Fusicladium oleagineum

Abstract: Viruega, J.

Cited by 35 publications

References 19 publications

Phenotypic, molecular and pathogenic characterization of Phlyctema vagabunda, causal agent of olive leprosy

Phenotypic, molecular and pathogenic characterization of Phlyctema vagabunda, causal agent of olive leprosy

Effect of Environmental Factors on Mycelial Growth and Conidial Germination of Fusicladium eriobotryae, and the Infection of Loquat Leaves

Evaluation of Fungicides and Management Strategies against Cercospora Leaf Spot of Olive Caused by Pseudocercospora cladosporioides

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