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Registro Completo |
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
10/01/2010 |
Data da última atualização: |
17/10/2012 |
Autoria: |
EVERSMEYER, M. G.; KRAMER, C. L. |
Afiliação: |
Merle G. Eversmeyer; Charles L. Kramer. |
Título: |
Vertical concentrations of fungal spores above wheat fields. |
Ano de publicação: |
1987 |
Fonte/Imprenta: |
Grana, v. 26, n. 1, p. 97-102, 1987. |
Idioma: |
Inglês |
Notas: |
DOI: 10.1080/00173138709428909 |
Conteúdo: |
Kramer-Collins volumetric spore samplers were used to measure concentrations of Puccinia graminis, P. recondita, Erysiphe graminis, Cladosporium, and Alternaria spores and fungal hyphal fragments within the canopy and at 1, 3, 6 and 14 m above ground level over wheat fields near Manhattan, Kansas, USA. The largest numbers of spores of each of the named fungi and hyphal fragments were trapped during hours when free moisture was not present on host leaf surfaces. As wind velocity increased, the number of spores and hyphal fragments trapped at all heights increased. Airspora trapped at the various sampling heights under all combinations of biometeorological conditions were calculated as ratios. Location and severity of infection or frequency of occurrence of the parent fungi greatly affected the percentage of propagules released in the canopy and escaped into the atmosphere. Less than 40% of P. recondita urediniospores released from tillering plants in the fall and trapped at 20–25 cm were trapped at 1 m, while only 6% of those trapped at 10 cm were trapped at 1 m. Ratios for the average number of spores trapped at 3 m: 1 m during the entire sampling period were similar for P. recondita (0.54), Alternaria (0.57), and E. graminis (0.48). However, the higher ratios that occurred with spores of P. graminis (0.72) and Cladosporium (0.76), and hyphal fragments (0.77) indicate considerable mixing of locally released airspora with airspora from exogenous sources. |
Palavras-Chave: |
Medição a campo. |
Thesagro: |
Fungo; Trigo. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01958naa a2200181 a 4500 001 1836098 005 2012-10-17 008 1987 bl --- 0-- u #d 100 1 $aEVERSMEYER, M. G. 245 $aVertical concentrations of fungal spores above wheat fields. 260 $c1987 500 $aDOI: 10.1080/00173138709428909 520 $aKramer-Collins volumetric spore samplers were used to measure concentrations of Puccinia graminis, P. recondita, Erysiphe graminis, Cladosporium, and Alternaria spores and fungal hyphal fragments within the canopy and at 1, 3, 6 and 14 m above ground level over wheat fields near Manhattan, Kansas, USA. The largest numbers of spores of each of the named fungi and hyphal fragments were trapped during hours when free moisture was not present on host leaf surfaces. As wind velocity increased, the number of spores and hyphal fragments trapped at all heights increased. Airspora trapped at the various sampling heights under all combinations of biometeorological conditions were calculated as ratios. Location and severity of infection or frequency of occurrence of the parent fungi greatly affected the percentage of propagules released in the canopy and escaped into the atmosphere. Less than 40% of P. recondita urediniospores released from tillering plants in the fall and trapped at 20–25 cm were trapped at 1 m, while only 6% of those trapped at 10 cm were trapped at 1 m. Ratios for the average number of spores trapped at 3 m: 1 m during the entire sampling period were similar for P. recondita (0.54), Alternaria (0.57), and E. graminis (0.48). However, the higher ratios that occurred with spores of P. graminis (0.72) and Cladosporium (0.76), and hyphal fragments (0.77) indicate considerable mixing of locally released airspora with airspora from exogenous sources. 650 $aFungo 650 $aTrigo 653 $aMedição a campo 700 1 $aKRAMER, C. L. 773 $tGrana$gv. 26, n. 1, p. 97-102, 1987.
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1. | | KRAMER, C.; MAGRIN, F. P.; MAUTA, D. de S.; SIMÕES, F.; HAWERROTH, F. J.; COSER, G. M. de A. G.; AGUIAR JUNIOR, L. V. de. Manejo da poda verde em macieiras Maxi Gala cultivadas sob tela antigranizo. In: JORNADA DE PÓS-GRADUAÇÃO E PESQUISA-CONGREGA URCAMP, 14., 2017, Bagé. Revista da 14ª Jornada de Pós-Graduação e Pesquisa-Congrega Urcamp. Bagé: Congrega URCAMP, 2017. v.1.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Uva e Vinho. |
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