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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
19/08/1999 |
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Data da última atualização: |
19/08/1999 |
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Autoria: |
MOSQUEDA-VAZQUEZ, R.; ARAGAKI, M.; NAKASONE, H. Y. |
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Afiliação: |
University of Hawaii, Honolulu, HI 96822. |
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Título: |
Screening of Carica papaya L. Seedlings for resistance to Root Rot Caused by |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
J. Amer. Soc. Hort. Sci, v.106, n.4, p.484-487, 1981 |
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Idioma: |
Inglês |
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Conteúdo: |
Papaya seedlings being tested for resistance to Phytophthora palmivora root rot were inoculated with sporangial suspensions which varied from 0 to 18,000/plant. Mortality counts and disease ratings of seedlings taken 1 month after inoculation showed that: (a) developmental resistance increased as seedlings became older and appeared totally developed by the time seedlings were 2 months old; (b) comparisons among papaya lines inoculated with increasing concentrations of inoculum demonstrated a dosage response; (c) 1-month-old papaya lines inoculated with a uniform concentration of inoculum (5,250 sporangia/plant) could be separated into 3 distinct groups. Line 8, `Waimanalo'-23, `Waimanalo'-24, and line 40 were resistant; 45-T22 and `Kapoho Solo' were moderately resistant and `Higgins' was susceptible. The correlation between green greenhouse and field mortality was r = 0.955, which supports the reliability of the method. |
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Categoria do assunto: |
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Marc: |
LEADER 01352naa a2200145 a 4500
001 1648279
005 1999-08-19
008 1981 bl --- 0-- u #d
100 1 $aMOSQUEDA-VAZQUEZ, R.
245 $aScreening of Carica papaya L. Seedlings for resistance to Root Rot Caused by
260 $c1981
520 $aPapaya seedlings being tested for resistance to Phytophthora palmivora root rot were inoculated with sporangial suspensions which varied from 0 to 18,000/plant. Mortality counts and disease ratings of seedlings taken 1 month after inoculation showed that: (a) developmental resistance increased as seedlings became older and appeared totally developed by the time seedlings were 2 months old; (b) comparisons among papaya lines inoculated with increasing concentrations of inoculum demonstrated a dosage response; (c) 1-month-old papaya lines inoculated with a uniform concentration of inoculum (5,250 sporangia/plant) could be separated into 3 distinct groups. Line 8, `Waimanalo'-23, `Waimanalo'-24, and line 40 were resistant; 45-T22 and `Kapoho Solo' were moderately resistant and `Higgins' was susceptible. The correlation between green greenhouse and field mortality was r = 0.955, which supports the reliability of the method.
700 1 $aARAGAKI, M.
700 1 $aNAKASONE, H. Y.
773 $tJ. Amer. Soc. Hort. Sci$gv.106, n.4, p.484-487, 1981
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Embrapa Mandioca e Fruticultura (CNPMF) |
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