Patterns of spore dispersal of the fungal pathogen Apiognomonia quercina and its anamorph Discula quercina were investigated over two consecutive growing seasons in a natural mixed stand of Quercus cerris and Q. pubescens trees located in a inland area of Tuscany, at an altitude of 400 m a.s.l. To measure spore dispersal, a transect was laid out in the stand to serve as an inoculum source. The rate of inoculum dispersal (conidia and ascospores) was quantifi ed by means of spore traps positioned at 10, 100, 500 and 1000 m from the southern end of the transect. The disease gradient was also assessed by determining the disease incidence on selected trees at the same distances from the transect. The amount of inoculum detected decreased steeply with the distance from the transect. Disease incidence was inversely correlated with the disease gradient, i.e. with the distance from the inoculum source, and it was much higher at the shorter distances. The level of spore dispersal was related to both the distance from the infection foci and the sporulation time. The experimental approach constituted a valid means for describing and understanding the dynamics of windborne diseases in forests.

Disease gradient of the anthracnose agent Apiognomonia quercina in a a natural oak stand / A. Ragazzi; E. Turco; L. Marianelli; I. Dellavalle; S. Moricca. - In: PHYTOPATHOLOGIA MEDITERRANEA. - ISSN 0031-9465. - STAMPA. - 46:(2007), pp. 295-303. [10.4081/ija.2009.s3.13]

Disease gradient of the anthracnose agent Apiognomonia quercina in a a natural oak stand

RAGAZZI, ALESSANDRO;TURCO, ELENA;MARIANELLI, LEONARDO;MORICCA, SALVATORE
2007

Abstract

Patterns of spore dispersal of the fungal pathogen Apiognomonia quercina and its anamorph Discula quercina were investigated over two consecutive growing seasons in a natural mixed stand of Quercus cerris and Q. pubescens trees located in a inland area of Tuscany, at an altitude of 400 m a.s.l. To measure spore dispersal, a transect was laid out in the stand to serve as an inoculum source. The rate of inoculum dispersal (conidia and ascospores) was quantifi ed by means of spore traps positioned at 10, 100, 500 and 1000 m from the southern end of the transect. The disease gradient was also assessed by determining the disease incidence on selected trees at the same distances from the transect. The amount of inoculum detected decreased steeply with the distance from the transect. Disease incidence was inversely correlated with the disease gradient, i.e. with the distance from the inoculum source, and it was much higher at the shorter distances. The level of spore dispersal was related to both the distance from the infection foci and the sporulation time. The experimental approach constituted a valid means for describing and understanding the dynamics of windborne diseases in forests.
2007
46
295
303
A. Ragazzi; E. Turco; L. Marianelli; I. Dellavalle; S. Moricca
File in questo prodotto:
File Dimensione Formato  
Phytopathmedit07.pdf

accesso aperto

Tipologia: Pdf editoriale (Version of record)
Licenza: Creative commons
Dimensione 141.16 kB
Formato Adobe PDF
141.16 kB Adobe PDF

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/333438
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact