Search results
Results from the WOW.Com Content Network
The fungal ancestors of stem rust have infected grasses for millions of years and wheat crops for as long as they have been grown. [7] According to Jim Peterson, professor of wheat breeding and genetics at Oregon State University, "Stem rust destroyed more than 20% of U.S. wheat crops several times between 1917 and 1935, and losses reached 9% twice in the 1950s," with the last U.S. outbreak in ...
Ug99 is a lineage of wheat stem rust (Puccinia graminis f. sp. tritici), which is present in wheat fields in several countries in Africa and the Middle East and is predicted to spread rapidly through these regions and possibly further afield, potentially causing a wheat production disaster that would affect food security worldwide. [1]
The M115 was a 500-pound (227 kg) bomb that was converted from a leaflet bomb and to be used to deliver wheat stem rust. [2] [6] Wheat stem rust culture consisted of a dry particulate matter which was adhered to a light-weight vector, usually feathers.
Rust fungi grow intracellularly, and make spore-producing fruiting bodies within or, more often, on the surfaces of affected plant parts. [3] Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts.
First of a series of rust resistant varieties. Widely adapted, good quality. It made up 70% of the Canadian wheat acreage in 1953. Rescue, 1946, Apex × S-615 (solid stem type from Portugal via North America). C.D.A. Ottawa. It has a solid stem developed for sawfly resistance. Saunders, 1947, (Hope × Reward) × Thatcher. Developed by ...
Wheat rusts include three types of Pucciniae: . P. triticina, wheat leaf rust, leaf rust, wheat brown rust, or brown rust; P. graminis, stem rust, wheat stem rust, barley stem rust, or black rust
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
He lacked trained scientists and equipment. Local farmers were hostile towards the wheat program because of serious crop losses from 1939 to 1941 due to stem rust. "It often appeared to me that I had made a dreadful mistake in accepting the position in Mexico," he wrote in the epilogue to his book, Norman Borlaug on World Hunger. [22]