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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
04/07/2019 |
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Autoria: |
PETRIE, G. A. |
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Título: |
Prevalence of six fungal pathogens associated with seeds of rape and turnip rape in Western Canada in 1976. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Canadian Plant Disease Survey, Ottawa, v. 58, n. 4, p. 99-103, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
Commercial seed lots of rape (Brassica napus) and turnip rape (B. campestris) from the year 1976 were examined for six fungal pathogens and the results compared with those of an earlier study conducted between 1967 and 1973. The six species were Alternaria brassicae, A. raphani, Fusarium roseum, Botrytis cinerea. Sclerotinia sclerotiorum, and Albugo candida (A. cruciferarum). The prevalence and incidence of all these, with the exception of A. brassicae, were higher in 1976 than in 1967-73. A considerable increase in A. raphani occurred on seed from southern Alberta and from Manitoba but levels of A. brassicae remained relatively static or even declined, except in the Peace River area of Alberta. B. cinerea occurred in 74% of seed samples from northern Alberta, indicating the possibility of an increase in seedling emergence problems. In that area also there was a large increase in S. sclerotiorum occurring in or on the seed itself, as opposed to its occurrence as sclerotia mixed with the seed. Oospores of A. candida were found in a much higher percentage of Alberta and Saskatchewan samples of B. campestris in 1976 than in 1967-73; mean infestation levels, as spores per g of seed, and the proportion of heavily infested samples also increased. |
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Thesagro: |
Fungo. |
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Thesaurus Nal: |
canola. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01704naa a2200145 a 4500
001 1832471
005 2019-07-04
008 1978 bl --- 0-- u #d
100 1 $aPETRIE, G. A.
245 $aPrevalence of six fungal pathogens associated with seeds of rape and turnip rape in Western Canada in 1976.
260 $c1978
520 $aCommercial seed lots of rape (Brassica napus) and turnip rape (B. campestris) from the year 1976 were examined for six fungal pathogens and the results compared with those of an earlier study conducted between 1967 and 1973. The six species were Alternaria brassicae, A. raphani, Fusarium roseum, Botrytis cinerea. Sclerotinia sclerotiorum, and Albugo candida (A. cruciferarum). The prevalence and incidence of all these, with the exception of A. brassicae, were higher in 1976 than in 1967-73. A considerable increase in A. raphani occurred on seed from southern Alberta and from Manitoba but levels of A. brassicae remained relatively static or even declined, except in the Peace River area of Alberta. B. cinerea occurred in 74% of seed samples from northern Alberta, indicating the possibility of an increase in seedling emergence problems. In that area also there was a large increase in S. sclerotiorum occurring in or on the seed itself, as opposed to its occurrence as sclerotia mixed with the seed. Oospores of A. candida were found in a much higher percentage of Alberta and Saskatchewan samples of B. campestris in 1976 than in 1967-73; mean infestation levels, as spores per g of seed, and the proportion of heavily infested samples also increased.
650 $acanola
650 $aFungo
773 $tCanadian Plant Disease Survey, Ottawa$gv. 58, n. 4, p. 99-103, 1978.
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