Pdf bypassing of a polygenic microcyclus ulei resistance. Notes on taxonomy and nomenclature top of page south american leaf blight was first mentioned by hennings 1904, who briefly described the pathogen. Latest pest free areas international plant protection. The free sporulating strain appeared to be associated with resistant. This fungal disease caused by the ascomycete microcyclus ulei, single handedly managed to prevent natural rubber production on a. A rubber trees durable resistance to microcyclus ulei is conferred by a qualitative gene and a major quantitative resistance factor. Rands 1924 reported that the pathogen needs 1012 hours of free water on the leaves for. The potential of the south american leaf blight as a biological agent.
He examined infected leaves from native rubber trees collected by ernst heinrich ule at the jurua river, brazil in 1901 and near iquitos, peru in 1902 wellman, 1972. The fungus microcyclus ulei is the causative agent of leaf blight in rubber trees, which is one of the most important diseases affecting this crop, since it causes intense defoliation. Pdf foliar endophytic fungi from hevea brasiliensis and their. In the report sgp012 posted on 2 sep 2012, singapore reported that a detection survey on microcyclus ulei from 2005 to 2010 conducted on rubber enclaves, imports from salb endemic countries and passenger arrivals in singapore revealed the status of salb as. Pdf foliar endophytic fungi from hevea brasiliensis and. Several races of this pathogen have been described in brazil based on a series of diverse differential clones. Microcyclus ulei south american leaf blight of rubber cabi.
Foliar endophytic fungi from hevea brasiliensis and their antagonism on microcyclus ulei article pdf available in fungal diversity 471. Estimates of the period of leaf wetness needed for infection vary. Pdf physiological characteristics of microcyclus ulei p. Microcyclus ulei south american leaf blight of rubber. Latest pest reports international plant protection.
Protection against south american leaf blight of rubber in asia and. Bypassing of a polygenic microcyclus ulei resistance in rubber tree, analyzed by qtl detection. A rubber trees durable resistance to microcyclus ulei is. Microcyclus ulei is the causative agent of south american leaf blight. The disease aps journals the american phytopathological society. This is to inform you that, given the current covid19 outbreak in italy, considering the travel restrictions being implemented by many countries and to ensure the safety and health of all participants, the fifteenth session of the commission on phytosanitary measures cpm15 has been postponed. Contingency plan for south american leaf blight microcyclus ulei. Pdf the ascomycete microcychis ulei causes premature leaf shedding of the rubber tree. Bypassing of a polygenic microcyclus ulei resistance in rubber tree. Pdf endophytic fungi live inside plants as symbionts for at least one period of their life cycle.
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