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Effect of soil moisture on the transmission of pea bacterial blight ( Pseudomonas syringae pv. pisi ) from seed to seedling
Author(s) -
ROBERTS S. J.
Publication year - 1992
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1992.tb02330.x
Subject(s) - pseudomonas syringae , seedling , biology , compost , inoculation , moisture , water content , horticulture , agronomy , transmission (telecommunications) , bacterial blight , blight , pseudomonas , botany , bacteria , biochemistry , genetics , materials science , geotechnical engineering , electrical engineering , gene , composite material , engineering
Controlled‐environment studies in which pea seed cv. Solara, inoculated with Pseudomonas syringae pv. pisi , was sown in pots of compost maintained at different moisture contents showed that soil moisture had a considerable influence on the transmission of the disease from seed to seedling. An equation was derived from this data which described the relationship between the proportion of seedlings infected ( p ) and the soil water stress ( s ) in MPa: ‐In(‐In(1 − p )) = 0.64 In( s ) + 4.5. This equation was used to produce predicted transmission rates for each year from 1987 to 1990, which were compared with measured transmission rates in field experiments at Wellesbourne in the same years. Although agreement between the observed and predicted transmission rates was poor, years of severe and slight disease transmission were successfully predicted.