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The effects of post‐inoculation wet and dry periods, and inoculum concentration, on lesion numbers of Septoria nodorum in spring wheat seedlings
Author(s) -
JEGER M. J.,
GRIFFITHS ELLIS,
JONES D. GARETH.
Publication year - 1985
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1985.tb03094.x
Subject(s) - biology , septoria , lesion , inoculation , horticulture , poaceae , botany , zoology , agronomy , psychology , psychiatry
SUMMARY Lesion numbers in seedlings of spring wheat cvs Kolibri and Maris Butler, inoculated with Septoria nodorum in a growth cabinet, varied with the length of wet or dry period following inoculation. Increasing the length of dry period led to a curvilinear decrease in lesion numbers at 15° C (60% r.h.) and 20° C (40% r.h.), but some infection still occurred with a dry period of 72 h. Increasing the length of wet period gave a linear increase in lesion numbers in cv. Maris Butler, but lesion numbers levelled off at 12 h at 15° C (60% r.h.) in cv. Kolibri. Increasing the inoculum concentration gave an increase in lesion numbers in both cultivars irrespective of whether wet or dry periods followed inoculation. On occasion, Kolibri and Maris Butler differed significantly in lesion numbers, but differences were not consistent between experiments, and there were interactions with the length of wet period.