An Analysis of the Risk of Introduction of Additional Strains of the Rust Puccinia psidii Winter (`Ohi`a Rust) to Hawai`i
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A preliminary assessment of high risk areas for Puccinia psidii (Eucalyptus rust) in the Neotropics and Australia
Puccinia psidii Winter, which causes both guava rust and eucalypt rust, is an important pathogen on eucalypts and other members of the Myrtaceae family in the Neotropics. If introduced into Australia it could represent a major potential threat to eucalypt plantations as well as native vegetation. Observations of the distribution of eucalypt rust epidemics in the Neotropics were analysed to deve...
متن کاملشناسایی جدایه های Puccinia graminis f. sp. tritici با بیماریزایی برای ژن مقاومت Sr31 در استان های غربی ایران
Stem or black rust of wheat, caused by Puccinia graminis Pers. f. sp. tritici Eriks. and Henn (Pgt), was the most feared and devastating disease of wheat at one time worldwide. The fear from stem rust was understandable because an apparently healthy looking crop about 3 weeks prior to harvest could reduce to a black tangle of broken stems and shriveled grain by harvest. The disease has been co...
متن کاملTracking down worldwide Puccinia psidii dispersal
Background Puccinia psidii causes rust disease on many host species in the Myrtaceae [1]. First reported in 1884 on guava in Southern Brazil [2], the rust has since been detected on several myrtaceous in South America, Central America, Caribbean, Mexico, USA: in Florida, California, and Hawaii. More recently, P. psidii was reported in Japan infecting M. polymorpha[3]. Of special note is that a ...
متن کاملAssessment of Two Different Sources of Durable Resistance and Susceptible Cultivar of Wheat to Stripe Rust (Puccinia striiformis f. sp. tritici)
A study was conducted to assess the durable resistance in a near isogenic line of spring wheat (Triticum aestivalis L.), possessing resistance gene Yr-18 to some isolates (race specific resistance) of stripe rust (Puccinia striiformis f. sp. tritici), namely Thatcher Yr-18 and durable resistance of an cultivar of spring wheat to all isolates of stripe rust (race non- specific resistance), namel...
متن کاملMultilocus Genotypes Indicate Differentiation Among Puccinia psidii Populations from South America and Hawaii
Puccinia psidii is the cause of rust disease of many host species in the Myrtaceae family, including guava (Psidium spp.), eucalypt (Eucalyptus spp.), rose apple (Syzygium jambos), and ʻohiʼa (Metrosideros polymorpha). First reported in 1884 on guava in Brazil, the rust has since been detected in South America (Argentina, Brazil, Colombia, Paraguay, Uruguay, and Venezuela), Central America (Cos...
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