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The effect of inoculation with Selenophoma donacis at different growth stages on spring barley cultivars
Author(s) -
BROKENSHIRE T.,
COOKE B. M.
Publication year - 1978
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.1744-7348.1978.tb07692.x
Subject(s) - biology , cultivar , inoculation , agronomy , spore , grain yield , horticulture , botany
SUMMARY Two spring barley field trials were established to study the importance of the time of Selenophoma donacis inoculum arrival on disease development and subsequent grain yield and quality. Inocula of two spore concentrations were applied to four barley cultivars at all combinations of three growth stages, tillering, stem extension and heading. The response varied with the stage of growth at inoculation; plants were susceptible at tillering, more resistant at stem extension and became highly susceptible at heading. Under wet conditions one application of spores at tillering gave rise to severe disease levels at heading. Treatments involving double and triple inoculum applications gave the highest disease levels on the upper leaves and awns resulting in significantly lower yields and grain quality. Significant relationships were established between disease severity at growth stages 10–1 and 11–1 and the mean yield per head, 1000 grain weight and sieving index.