University of california, division of agriculture and natural. Peacock spot, spilocaea oleagina, disease prevalence, disease severity, iran. Global warming or climate tropicalization is the cause of increasing temperature and humidity in the temperate areas of europe and north america. Taxonomyofthegenusventuria the genus venturia belongs to the phylum ascomycota, class dothideomycetes schoch et al. Limited information is available on pathogen survival and disease epidemiology. The fungus spilocaea oleagina causes peacock leaf spot in olive. The holes in the pot are clogged at the bottom of the pot. 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. The effect of local fungicides on conidial germination of. 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%. The author has studied the anatomical characters comparatively between two cv. Olive scab caused by the mitosporic fungus spilocaea oleagina is the most important foliar disease of olive. Effects of temperature, inoculum concentration, leaf age, and.
Silicon reduces the incidence of venturia oleaginea. Pdf evaluation of the incidence and severity of olive leaf. Production of propagation stock the nuclear stock is multiplied in as few steps as possible to. Article full text enhanced pdf format, 303501 bytes. Spilocaea oleagina, olivetree scab neves evaristo f. 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. Pdf survey of spilocaea oleagina, causal agent of olive leaf spot. 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. The role of phenolic metabolism in the defense of the. Application of leaf extracts of ambrosia artemisiifolia to control. It causes leaf abscission and, eventually, whole tree weakness, resulting in a subsequent loss in crop yield. Survey of spilocaea oleagina, causal agent of olive leaf spot. Losses arise mostly from defoliation of severely infected trees, with consequently reduced yield.
Evaluation of the incidence and severity of olive leaf spot. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. 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. Olive leaf spot or peacock spot, caused by the fungal pathogen spilocaea oleagina, can cause reduced growth and yield in olive trees olea eurapaea. Its causal agent, formerly spilocaea oleaginea, syn. Palestine technical university research journal, 21. The similarity extends beyond the clinical appearance to a recent increase in the frequency of both in the area of naples, italy. Symptoms are mainly confined to leaves and appear as dark brown, circular, zonate spots surrounded by yellow haloes peacocks eye. 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. Spilocaea oleagina is a deuteromycete because it has no known sexual stage. Consistent annual treatment helps future olive leaf spot control pdf. Pdf olive scab caused by the mitosporic fungus spilocaea oleagina is the most important foliar disease of olive. Fusicladium oleagineum, the fungal causal agent of olive. Media in category spilocaea oleaginea the following 2 files are in this category, out of 2 total.
This plant disease commonly affects the leaves of olive trees worldwide. Effects of temperature, inoculum concentration, leaf age. When several references are cited, they may give conflicting information on the status. Guideline for the biological evaluation of fungicides spilocaea oleagina olive leaf spot 1. The plants should also be visually inspected each year for possible mutations. Olive scab or leaf spot, caused by the fungus spilocaea oleagina, is widespread in the mediterranean region. Survey of the fungal species associated to olivetree olea europaea l. This is spilocaea oleagina in lebanon by feeding knowledge on vimeo. The disease affects trees throughout the growing season and can cause significant losses in yield. Ishs iii international symposium on olive growing epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain. Pdf olive leaf spot or peacock spot, caused by the fungal pathogen spilocaea oleagina, can cause reduced growth and yield 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. Olive leaf spot ols, also called peacock spot, is caused by the fungus spilocaea oleagina syn. The disease is also called peacocks eye, and the main symptom in olive trees is circular lesions, sometimes with a chlorotic halo on the. Investigations were carried out during 20072010 to measure the prevalence and severity of olive leaf spot in the northern olive growing regions of iran.
Olive scab or leaf spot, caused by the fungus spilocaea oleagina. Viruega jr, trapero a 1999 epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain. Olive scab or leaf spot, spilocaea oleagina pessl instruments. Epidemiology and control excerpts from the report prepared by friday obanor, phd candidate, lincoln university, december 2005. Molecular analysis of the interaction between blackwell. The luxi and luxr quorum sensing genes in pseudomonas savastanoi pv.
Field models for the prediction of leaf infection and. The effect of local fungicides on conidial germination of spilocaea oleagina in palestine. The life cycle of the causative agent, spilocaea oleagina is dependent on climatic. Pdf epidemiology of leaf spot of olive tree caused by.
Olive patents and patent applications class plt158. 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. Phylogeny of the fungus spilocaea oleagina, the causal agent. Spilocaea pomi article about spilocaea pomi by the free. Full length article resistance of olive tree to spilocaea. The distribution in this summary table is based on all the information available. Pessl instruments olive scab or leaf spot, spilocaea oleagina. Microsoft windowsbased freeware for population genetic analysis. 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. Peacock spot disease, caused by spilocaea oleagina, in the region of gharb and ouazzane morocco. Occhio di pavone o cicloconio spilocaea oleagina youtube. Pdf spilocaea oleagina in olive groves of southern spain. Biologyandepidemiologyof venturia speciesaffectingfruit. Bacterial isolates used in this study varied in their in vitro control activity against the leaf spot olive fungus c oleaginum.
For the resistant variety, these symptoms are composed of small necrotic lesions, whereas for the susceptible variety, they appear as extended necrotic spots. Palestine, spilocaea oleagina, peacock spot, disease severity, olea europaea. However, no conidia germinates without free water even after 48 h of. Download adobe acrobat reader free software to read pdf files. Genetic variation in spilocaea oleagina populations from new. Peacock leaf spot, caused by the fungus spilocaea oleagina, is among the most common fungal diseases in olive. Spilocaea oleaginea is the fungus which causes olive leaf spot, also known as peacock spot, an olive tree disease. Spilocaea oleagina in olive groves of southern spain. Evaluation of the incidence and severity of olive leaf. The tree is distinctly important in the economic and social life of the people.
According to results of previous studies obanor et al, 2011. Cycloconium oleagineum, was recently assigned to fusicladium oleagineum on the basis of morphological and genotypic traits. Timing of fungicide applications and their high costs and possible effects on human health and the environment are critical for an effective control. Although much is known about the effect of climatic conditions on the development of peacock leaf spot of olive, field. Osser vazioni anatomiche su foglie di olivo sane ed. 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. Field models for the prediction of leaf infection and latent. Use the link below to share a fulltext version of this article with your friends and colleagues. Ols is the most important leaf disease of olive in many olive. Molecular analysis of the interaction between olea europaea and the biotrophic fungus spilocaea oleagina yoselin benitez 1, miguel a. Pdf survey of the fungal species associated to olive. The results show that the architecture presented in this paper significantly decreases the. 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. Pdf resistance of olive tree to spilocaea oleagina is.
This is spilocaea oleagina in lebanon by feeding knowledge on vimeo, the home for high quality videos and the people who love them. The presence of free moisture on the leaves is crucial for the conidia to. 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. Leccino not receptive anatomical differences of the leaf as a whole and. 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. 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. Pdf evaluation of the incidence and severity of olive. Influence of certain cultural practices and variable climatic. Olive leaf spot caused by the fungus, spilocaea oleagina, is the most important leaf. International journal of scientific research in science and technology. Anatomical observations on sound leaves and by spilocaea oleagina cast. Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive. 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.
Olive leaf spot ols caused by the fungus spilocaea oleagina cast. Olive, pests if you see many leaves falling off from your olive tree, and there are blackish stains on the surface of. Global warming and its effect on dermatology and plants. The fungus causes leaf drop which robs the tree of vegetative energy leading to smaller crops and poor growth. Article full text enhanced pdf format, 180766 bytes article sharing. 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. Phylogenyofthefungus spilocaea oleagina,thecausalagentof. Further details may be available for individual references in the distribution table details.
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. Epidemiology of leaf spot of olive tree caused by spilocaea oleagina in southern spain article pdf available in acta horticulturae 474474. Phylogeny of the fungus spilocaea oleagina, the causal agent of. This disease is widespread in many olivegrowing regions of the world trapero casas et al. 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. Resistance of olive tree to spilocaea oleagina is mediated by the synthesis of phenolic compounds. The disease is controlled by application of coppercontaining fungicides prior to winter rains. Phylogeny of the fungus spilocaea oleagina, the causal.