The apricotphytoplasma, Candidatus Phytoplasma prunorum, is the pathogen responsible for this infection that afflicts not only apricots, but over 1,000 plant species worldwide. The following article examines the causes and treatment options for apricotswithphytoplasma. Lately, phytoplasma diseases occur on many fruit species and are responsible for serious losses both in quality and quantity for fruit production. Apricotphytoplasma disease (Candidatus Phytoplasma prunorum) was reported first from France in Europe in 1924. Apricot trees with and without symptoms were selected for sampling in four locations of Faraghe (30 km West of Abarkooh, Yazd province, Iran). Sixteen samples (four per location from four trees) were collected from chlorotic leaf roll-affected apricot trees (Felakei cultivar). For discrimination of phytoplasma strains several PCR methods exist, but these have not been developed for routine detection of phytoplasma in a large number of samples. The disease caused by phytoplasma is a critical threat for apricot growers. In this study, pomological data were collected from three apricot trees (cv. 'Precoce de Tyrinthe') that are infected by Candidatus Phytoplasma prunorum disease and from healthy plants under field conditions. The identification of phytoplasma(s) associated with this disease was carried out in different regions of Italy. The presence of phytoplasma specific DNA bands was detected in most of the symptomatic apricot samples after nested-PCR using the R16... Grafting was carried out in five treatments where each treatment contained two AlmWB-infected almond trees grafted with one of the following scion varieties: Plum Abou-riha, Janarek Plum, Plum Fortune, Plum Santarosa and Apricot Farclo. Apricot chlorotic leafroll phytoplasma. 3. PEST SIGNIFICANCE. Economic impact Apricot trees are killed 12-24 months after first appearance of symptoms. This period may be reduced to weeks if the rootstock is peach. Regular samplings were taken in a pesticide-treatedapricot orchard infected with ESFY during the vegetation period of 2001 in Pomáz, Hungary. Due to its near-ideal natural attributes, Pomáz is highly suitable for growing apricots. Treatingapricotswithphytoplasma is challenging as there is no cure; infected trees should typically be removed to prevent spread. Root Rot Issues. Soil-borne pathogens are serious threats Abstract. ISHS XI International Symposium on Apricot Culture IDENTIFICATION BY MOLECULAR TECHNIQUES OF PHYTOPLASMAS ASSOCIATED WITH APRICOT CHLOROTIC LEAFROLL IN ITALY. INTRODUCTION Phytoplasmas are the smallest wall-less prokaryote known plant-pathogenic bacteria associated with diseases in numerous plant species worldwide (Lee et al., 2000). *Corresponding author. The apricotphytoplasma disease (Ca. Phytoplasma prunorum) was first reported in Europe in 1924 from France.Yield of herbicide tolerant sunflower hybrids due to the different herbicide treatments. Task 5 will identify endophyte populations in host plants and use knowledge of their interactions with both the host plant and phytoplasmas as tool for the establishment of an integrated, environmentally sustainable and innovative control of these diseases. Cost 258/08 (technical annex).
