Survey of spilocaea oleagina, causal agent of olive leaf spot. Fusicladium oleagineum, the fungal causal agent of olive. Phylogeny of the fungus spilocaea oleagina, the causal agent of. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. The luxi and luxr quorum sensing genes in pseudomonas savastanoi pv. The presence of free moisture on the leaves is crucial for the conidia to. Spilocaea oleagina, olivetree scab neves evaristo f. Spilocaea oleaginea is the fungus which causes olive leaf spot, also known as peacock spot, an olive tree disease. Taxonomyofthegenusventuria the genus venturia belongs to the phylum ascomycota, class dothideomycetes schoch et al. The holes in the pot are clogged at the bottom of the pot.
Olive scab caused by the mitosporic fungus spilocaea oleagina is the most important foliar disease of olive. Article full text enhanced pdf format, 303501 bytes. The effects of temperature, relative humidity rh, leaf wetness and leaf age on conidium germination were investigated for spilocaea oleagina, the causal organism of olive leaf spot. Pdf evaluation of the incidence and severity of olive leaf. Epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain article pdf available in acta horticulturae 474474. The effect of local fungicides on conidial germination of spilocaea oleagina in palestine. Pdf epidemiology of leaf spot of olive tree caused by. Pdf evaluation of the incidence and severity of olive. This is spilocaea oleagina in lebanon by feeding knowledge on vimeo, the home for high quality videos and the people who love them.
International journal of scientific research in science and technology. Influence of certain cultural practices and variable climatic. Effects of temperature, inoculum concentration, leaf age, and. Ishs iii international symposium on olive growing epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain. Effects of temperature, inoculum concentration, leaf age. Olive patents and patent applications class plt158. Molecular analysis of the interaction between blackwell. Timing of fungicide applications and their high costs and possible effects on human health and the environment are critical for an effective control.
Bacterial isolates used in this study varied in their in vitro control activity against the leaf spot olive fungus c oleaginum. Overall, tetraconazole reduced the disease and, as a systemic action, may be associated with dodine or copper to control spilocaea oleagina particularly when the disease is well developed. For the resistant variety, these symptoms are composed of small necrotic lesions, whereas for the susceptible variety, they appear as extended necrotic spots. Application of leaf extracts of ambrosia artemisiifolia to control. Its causal agent, formerly spilocaea oleaginea, syn. Viruega jr, trapero a 1999 epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain. Genetic variation in spilocaea oleagina populations from new. However, no conidia germinates without free water even after 48 h of.
Further details may be available for individual references in the distribution table details. When several references are cited, they may give conflicting information on the status. Olive scab or leaf spot, caused by the fungus spilocaea oleagina. Olive leaf spot caused by the fungus, spilocaea oleagina, is the most important leaf disease of olives in many olivegrowing regions worldwide with yield losses of up to 20%. Olive leaf spot ols, also called peacock spot, is caused by the fungus spilocaea oleagina syn. Sep 27, 2007 the effects of temperature, relative humidity rh, leaf wetness and leaf age on conidium germination were investigated for spilocaea oleagina, the causal organism of olive leaf spot. Use the link below to share a fulltext version of this article with your friends and colleagues. The life cycle of the causative agent, spilocaea oleagina is dependent on climatic. Olive leaf spot or peacock spot, caused by the fungal pathogen spilocaea oleagina, can cause reduced growth and yield in olive trees olea eurapaea. Pdf spilocaea oleagina in olive groves of southern spain.
Pdf resistance of olive tree to spilocaea oleagina is. Production of propagation stock the nuclear stock is multiplied in as few steps as possible to. Field models for the prediction of leaf infection and. Spilocaea oleagina is a deuteromycete because it has no known sexual stage. The plants should also be visually inspected each year for possible mutations. Pdf olive scab caused by the mitosporic fungus spilocaea oleagina is the most important foliar disease of olive.
As a realworld application of this architecture and the proposed methodologies, we show an application to the problem of modeling two plagues of the olive tree. Molecular analysis of the interaction between olea europaea and the biotrophic fungus spilocaea oleagina yoselin benitez 1, miguel a. Losses arise mostly from defoliation of severely infected trees, with consequently reduced yield. Pessl instruments olive scab or leaf spot, spilocaea oleagina. Download adobe acrobat reader free software to read pdf files. Pdf olive leaf spot or peacock spot, caused by the fungal pathogen spilocaea oleagina, can cause reduced growth and yield in olive.
Spilocaea pomi article about spilocaea pomi by the free. The disease is also called peacocks eye, and the main symptom in olive trees is circular lesions, sometimes with a chlorotic halo on the. Olive leaf spot ols caused by the fungus spilocaea oleagina cast. Phylogenyofthefungus spilocaea oleagina,thecausalagentof. Evaluation of the incidence and severity of olive leaf. Cycloconium oleagineum, was recently assigned to fusicladium oleagineum on the basis of morphological and genotypic traits. Osser vazioni anatomiche su foglie di olivo sane ed. Olive scab or leaf spot, spilocaea oleagina pessl instruments. Guideline for the biological evaluation of fungicides spilocaea oleagina olive leaf spot 1. Full length article resistance of olive tree to spilocaea.
This disease is widespread in many olivegrowing regions of the world trapero casas et al. Spilocaea oleagina in olive groves of southern spain. Palestine, spilocaea oleagina, peacock spot, disease severity, olea europaea. The disease is controlled by application of coppercontaining fungicides prior to winter rains.
The effect of local fungicides on conidial germination of. Peacock spot disease, caused by spilocaea oleagina, in the region of gharb and ouazzane morocco. According to results of previous studies obanor et al, 2011. Article full text enhanced pdf format, 180766 bytes article sharing. Ols is the most important leaf disease of olive in many olive. It causes leaf abscission and, eventually, whole tree weakness, resulting in a subsequent loss in crop yield. The results show that the architecture presented in this paper significantly decreases the. Phylogeny of the fungus spilocaea oleagina, the causal agent.
The role of phenolic metabolism in the defense of the. Microsoft windowsbased freeware for population genetic analysis. Biologyandepidemiologyof venturia speciesaffectingfruit. This plant disease commonly affects the leaves of olive trees worldwide. Leccino not receptive anatomical differences of the leaf as a whole and.
Peacock spot, spilocaea oleagina, disease prevalence, disease severity, iran. Pdf survey of spilocaea oleagina, causal agent of olive leaf spot. Abstract one of the major problems threatening the young new zealand olive industry is olive leaf spot ols, also called peacock spot, caused by a fungus, spilocaea oleagina. University of california, division of agriculture and natural. Olive leaf spot caused by the fungus, spilocaea oleagina, is the most important leaf. The author has studied the anatomical characters comparatively between two cv.
In order to get insight, an in vitro culture of the fungus has been established and its identity confirmed by amplified fragment length polymorphism analysis. Evaluation of the incidence and severity of olive leaf spot caused by spilocaea oleagina on olive trees in palestine abstract fulltext html download as pdf size. Investigations were carried out during 20072010 to measure the prevalence and severity of olive leaf spot in the northern olive growing regions of iran. Silicon reduces the incidence of venturia oleaginea. Phylogeny of the fungus spilocaea oleagina, the causal. Olive scab or leaf spot, caused by the fungus spilocaea oleagina, is widespread in the mediterranean region. Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive.
Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive peacock spot, also known as olive leaf spot and birds eye spot. The tree is distinctly important in the economic and social life of the people. Olive, pests if you see many leaves falling off from your olive tree, and there are blackish stains on the surface of the leaves, this means that it is suffering olive spot. Field models for the prediction of leaf infection and latent. Resistance of olive tree to spilocaea oleagina is mediated by the synthesis of phenolic compounds. Consistent annual treatment helps future olive leaf spot control pdf. The disease affects trees throughout the growing season and can cause significant losses in yield. Global warming and its effect on dermatology and plants. Olive leaves with obvious ols symptoms were cut into 5 2 cm segments, placed in a tube containing 5 20ml sterile distilled water and shaken vigorously. Climatic factors influence the emergence and reemergence of infectious diseases by shifting the geographic range of the insect vector and lengthening the reproductive cycles of insects.
Epidemiology and control excerpts from the report prepared by friday obanor, phd candidate, lincoln university, december 2005. The life cycle of the causative agent, spilocaea oleagina is dependent on climatic conditions, which the most important are temperature and humidity obanor et al, 2008. Palestine technical university research journal, 21. Evaluation of the incidence and severity of olive leaf spot. Resistance of olive tree to spilocaea oleagina is mediated by the synthesis of phenolic compounds article pdf available in international journal of agriculture and biology january 2010 with. The aim of this work was to conduct a field survay to assess the incidence % infected leaves and severity number of lesionsleaf of ols in different regions in palestine. Limited information is available on pathogen survival and disease epidemiology. Anatomical observations on sound leaves and by spilocaea oleagina cast. Occhio di pavone o cicloconio spilocaea oleagina youtube. This is spilocaea oleagina in lebanon by feeding knowledge on vimeo. Global warming or climate tropicalization is the cause of increasing temperature and humidity in the temperate areas of europe and north america. The fungus causes leaf drop which robs the tree of vegetative energy leading to smaller crops and poor growth. Peacock leaf spot, sometimes also referred to as olive scab, olive leaf spot or cycloconium leaf spot, is one of the most common diseases of olive olea europaea trees worldwide obanor et al. The similarity extends beyond the clinical appearance to a recent increase in the frequency of both in the area of naples, italy.
The role of phenolic metabolism in the defense of the olive. Symptoms are mainly confined to leaves and appear as dark brown, circular, zonate spots surrounded by yellow haloes peacocks eye. The fungus spilocaea oleagina causes peacock leaf spot in olive. Spilocaea oleagina induces a foliar necrosis whose speed of onset and expansion distinguishes clearly the two studied varieties according to their behaviour to the leafspot disease. The distribution in this summary table is based on all the information available. Post jobs, find pros, and collaborate commission free in. Uspp77p2 us09670,008 us67000800v uspp77p2 us pp77 p2 uspp77 p2 us pp77p2 us 67000800 v us67000800 v us 67000800v us pp77 p2 uspp77 p2 us pp77p2 authority us united states prior art keywords carlo don olea europaea shape position prior art date 20000925 legal status the legal status is an assumption and is not a legal. Pdf survey of the fungal species associated to olive. Media in category spilocaea oleaginea the following 2 files are in this category, out of 2 total.
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