Výsledky vyhledávání - "Frederick J. Ryan"

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Appointment of Frederick J. Ryan, Jr., as Assistant to the President November 4, 1987.

Publikováno v: American Reference Library - Primary Source Documents; 2001, p1, 0p

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Appointment of Frederick J. Ryan, Jr., as Deputy Assistant to the President February 6, 1985.

Publikováno v: American Reference Library - Primary Source Documents; 2001, p1, 0p

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Appointment of Frederick J. Ryan, Jr., as Special Assistant to the President and Director of Presidential Appointments and Scheduling February 25, 1983.

Publikováno v: American Reference Library - Primary Source Documents; 2001, p1, 0p

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Tumbleweed (Salsola, section Kali) species and speciation in California

Autor: Frederick J. Ryan, Debra R. Ayres, Eva Grotkopp, John P. Bailey, John F. Gaskin

Publikováno v: Biological Invasions. 11:1175-1187

Tumbleweeds (Salsola species, section Kali) are road side and rangeland pest plants throughout the 48 contiguous states in the US. Three described tumbleweed species and two undescribed Salsola taxa occur in California. The known species are Russian

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ef22980cb1fdc4c8379a363f914cc81
https://doi.org/10.1007/s10530-008-9380-5

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Molecular comparisons of Salsola tragus from California and Ukraine

Autor: Michael J. PitcairnM.J. Pitcairn, Frederick J. Ryan, Sergei L. Mosyakin

Publikováno v: Canadian Journal of Botany. 85:224-229

In California, the exotic invasive plant Salsola tragus L. (Russian thistle) has been found to consist of two genetic entities, types A and B. Type A, with chromosome number 2n = 36, was identified as S. tragus s.str., but type B, with 2n = 18, was n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::693e51bd601e178f0ff6cce7b85d82ee
https://doi.org/10.1139/b07-005

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GENOTYPE DIVERSITY OF SALSOLA TRAGUS AND POTENTIAL ORIGINS OF A PREVIOUSLY UNIDENTIFIED INVASIVE SALSOLA FROM CALIFORNIA AND ARIZONA

Autor: G. Frederic Hrusa, John F. Gaskin, Frederick J. Ryan, Jason P. Londo

Publikováno v: Madroño. 53:244-251

Various Salsola spp. have been introduced to the USA, and some of these are considered noxious or invasive in certain regions. The genus is taxonomically challenging, and recent morphological, cytological, and molecular work has shown that an unknown

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2bf573d98f5e7158eb4cbea75e0b5244
https://doi.org/10.3120/0024-9637(2006)53[244:gdosta]2.0.co

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Differential susceptibility of Russian thistle accessions to Colletotrichum gloeosporioides

Autor: L. Vajna, Ildikó Schwarczinger, W. L. Bruckart, C. A. Cavin, Frederick J. Ryan

Publikováno v: Biological Control. 30:306-311

Molecular information suggests that Russian thistle ( Salsola tragus L.) in the US may consist of more than one genetic entity. This genetic variation needs to be taken into account when developing agents for biological control of this important weed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5853ca8d305ba0d44d8c063fdea20318
https://doi.org/10.1016/j.biocontrol.2003.12.001

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DNA phenotyping to find a natural enemy in Uzbekistan for California biotypes of Salsola tragus L

Autor: Michael J. Pitcairn, Aloviddin Khamraev, Frederick J. Ryan, R. Sobhian, D. E. Bell

Publikováno v: Biological Control. 28:222-228

Salsola tragus L. (Russian thistle, Chenopodiaceae), a weed of Central Asian origin, has two biotypes in California, type A and type B. The gall midge Desertovellum stackelbergi Mamaev (Diptera: Cecidomyiidae), which attacks S. tragus in Uzbekistan,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52b97f0388d4e4f1d7b6c555c29d72c4
https://doi.org/10.1016/s1049-9644(03)00068-9

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