Data/hora: 14/06/2024 07:03:04

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 14/10/1998
Data da última atualização: | 14/10/1998
Autoria: | MUIMBA-KANKOLONGO, A.; BERGSTROM, G. C.
Título: | Wound predisposition of maize to anthracnose stalk rot as affected by internode position and inoculum concentration of Colletotrichum graminicola.
Ano de publicação: | 1992
Fonte/Imprenta: | Plant Disease, v. 76, n. 2, p. 188-195, Feb., 1992.
Idioma: | Inglês
Conteúdo: | A 2-yr study was carried out to ascertain the nature of wound predisposition of maize to anthracnose stalk rot (ASR) relative to internode position and inoculum level. For each inoculation regime, the most severe ASR developed in the susceptible hybrid. At each inoculum level, the most severe ASR resulted from inoculation at anthesis and immediatelly after wounding. Disease severity increased with increasing inoculum up to 107 conidia per milliliter in greenhouse-grown plants and up to 106 conidia per milliliter in field-grown plants. Genotypic, ontogenic, and "wound healing" resistances to ASR were expressed in maize even at high inoculum levels of C. graminicola Systemic ASR resulted from inoculation immediately after wounding of any of the first five internodes above the brace roots, but wound healing restriced considerably systemic ASR after inoculation of aged wounds in the lowermost stem internodes.
Palavras-Chave: | Fungus; Maize; Predisposition.
Thesagro: | Antracnose; Colletotrichum Graminicola; Fungo; Milho.
Thesaurus Nal: | anthracnose.
Categoria do assunto: | --
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (4255-1) - ADC - SP - -- - S 11408 -  - S 11408 - DIS