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Bodenverdichtung und Tintenkrankheit
Author(s) -
Fonseca T. F.,
Abreu C. G.,
Parresol B. R.
Publication year - 2004
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/j.1439-0329.2004.00371.x
Subject(s) - logistic regression , biology , edaphic , compaction , soil compaction , environmental science , soil water , ecology , mathematics , engineering , geotechnical engineering , statistics
Summary Chestnut ink disease caused by the oomycete Phytophthora cinnamomi , a soil‐borne pathogen of world‐wide distribution, accounts for the majority of disease problems on chestnuts in Portugal, limiting yield in a large number of stands and impeding establishment of trees in new areas. A survey was carried out in 32 chestnut stands in the Padrela Mountains of northern Portugal to investigate the relationship among ink disease occurrence, edaphic factors and management practices. A logistic regression function was employed to analyze the effect of soil attributes and management practices on the stand health status. Results showed that the main factors affecting disease were soil compaction (COMP), soil organic matter level (OM) and manuring practice (MA). A logistic model containing the soil variable COMP and the interaction term OM × MA correctly predicted the stand health status in 94%, or 30, of the 32 stands studied. The logistic function coefficients indicate that the probability of a stand having ink disease increases with increasing soil compaction and increasing soil organic matter content in stands where manuring is the usual practice.