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Published in Crop Sci 8:627-628 (1968)
© 1968 Crop Science Society of America
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Uredospore Storage in Breeding for Crown Rust Resistant Annual Ryegrass1

Hugh W. Bennett2

Green leaves of annual ryegrass, Lolium multiflorum Lam., with active pustules of crown rust, Puccinia coronata Cda., uredospores were stored from May to July in a refrigerator at 5 to 10 C. They yielded sufficient inoculum for artificial epiphytotics. The technique reduced the time needed for reproducing the disease, and it succeeded in developing 'Magnolia' annual ryegrass, highly resistant to crown rust.

Key Words: spore storage • rust spores • rust resistance • annual ryegrass • crown rust

1 Cooperative investigations of the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture and the Mississippi Agricultural Experiment Station, State College. Approved for publication as Journal Article No. 1615, Mississippi Agr. Exp. Sta.

2 Agent, Research Agronomist, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, and Mississippi Agr. Exp. Sta., State College, Miss. 39762.

Received for publication April 13, 1968.




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