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Latest Puccinia Stories

2013-11-15 23:01:26

Based on a new study, the native guava tree in Brazil is not the source of the pathogen that causes eucalypt rust disease. Scientists from Brazil’s Universidade Federal de Viçosa, the U.S. Forest Service and Washington State University are digging deeper to learn more about the invasive pathogen Puccinia psidii, which is not only impacting eucalypt plantations in Brazil and native eucalypts in Australia but other diverse myrtaceous tree species such as allspice, clove and rose apple...

2012-08-31 13:46:18

Experts at Beijing meeting report progress in preparing farmers to resist Ug99; Warn that vast wheat-growing regions of N. Africa, Central Asia remain at-risk The world's top wheat experts today reported a breakthrough in their ability to track Ug99 and related strains of a deadly and rapidly mutating wheat pathogen called stem rust that threatens wheat fields from East Africa to South Asia. With data submitted by farmers and scientists from fields and laboratories, the creators of the...

2012-04-11 22:32:18

More than 600 million people could be fed each year by halting the spread of fungal diseases in the world's five most important crops, according to research published today in the journal Nature. Furthermore, data reviewed by scientists suggests that in 70% of cases where infectious disease causes the extinction of a type of animal or plant, an emerging species of fungus is behind the problem. Evidence suggests this figure is increasing. The scientists behind the study, from the...

2011-10-24 23:07:45

U.S. Department of Agriculture (USDA) scientists have identified a number of stem rust-resistant wheat varieties and are retesting them to verify their resistance. Stem rust occurs worldwide wherever wheat is grown. Over a large area, losses from stem rust can be severe, ranging from 50 to 70 percent, and individual fields can be destroyed. Agricultural Research Service (ARS) plant pathologist Mike Bonman at the agency's Small Grains and Potato Germplasm Research Unit in Aberdeen,...

2011-10-13 11:27:11

Traditional thought has held that disease had to penetrate a plant to initiate resistance; however, two Washington State University scientists have established that a barley plant recognizes an invader and begins to marshal its defenses within five minutes of an attack. The discovery, along with the scientists' successful cloning of disease-fighting genes and the pathogen signal recognized by the plant, could help to revolutionize the battle against cereal crop enemies, such as stem rust....

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2011-06-11 06:40:00

A widespread wheat plague is threatening farms, raising bread prices and unleashing fresh political and economic unrest, according to experts. The disease strain has shown up in Africa, the Middle East and Asia, and has hiked food prices in the Arab world, Mexico, Haiti and beyond. "Stem rust, when it goes epidemic, destroys a crop," said Ronnie Coffman, a leading expert on wheat disease and chair of the department of plant breeding and genetics at Cornell University. "There is nothing left...

2011-05-09 21:33:46

An international team of researchers co-led by a U.S. Department of Agriculture (USDA) scientist has sequenced the genomes of two fungal pathogens-one that threatens global wheat supplies and another that limits production of a tree crop valued as a future source for biofuel. The sequencing of the genetic codes of wheat stem rust pathogen (Puccinia graminis) and poplar leaf rust pathogen (Melampsora larici-populina) is expected to help researchers develop control strategies to address...

2011-05-03 22:41:54

Fungi play significant ecological and economic roles. They can break down organic matter, cause devastating agricultural blights, enter into symbiotic relationships to protect and nourish plants, or offer a tasty repast. For industrial applications, fungi provide a source of enzymes to catalyze such processes as generating biofuels from plant biomass. One large fungal group with such enzymes are the rust plant pathogens which cannot survive on their own so they use crops as hosts, leading to...

2011-04-20 15:08:33

Researchers meeting at a scientific conference in Aleppo this week reported that aggressive new strains of wheat rust diseases "“ called stem rust and stripe rust "“ have decimated up to 40% of farmers' wheat fields in recent harvests. Areas affected are North Africa, the Middle East, Central Asia and the Caucuses, including Syria, Egypt, Yemen, Turkey, Iran, Uzbekistan, Morocco, Ethiopia, and Kenya. "These epidemics increase the price of food and pose a real threat to rural...

2010-06-01 19:39:22

Agricultural Research Service (ARS) scientists have solved a longstanding mystery as to why a pathogen that threatens the world's wheat supply can be so adaptable, diverse and virulent. It is because the fungus that causes the wheat disease called stripe rust may use sexual recombination to adapt to resistant varieties of wheat. ARS plant pathologist Yue Jin and his colleagues Les Szabo and Marty Carson at the agency's Cereal Disease Laboratory at St. Paul, Minn., have shown for the first...


Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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