Premium
Strategies for control of seed‐borne Alternaria dauci (leaf blight) of carrots in priming and process engineering systems
Author(s) -
MAUDE R. B.,
DREW R. L. K.,
GRAY D.,
PETCH G. M.,
BUJALSKI W.,
NIENOW A. W.
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.tb02339.x
Subject(s) - iprodione , thiram , biology , fungicide , priming (agriculture) , horticulture , blight , agronomy , seed treatment , polyethylene glycol , seedling , germination , biochemistry
Laboratory and glasshouse experiments demonstrated that priming of carrot seeds infected with Alternaria dauci did not affect the rate of transmission of the pathogen. Iprodione applied as a dust to unprimed, infected seeds at 5 ga.i. per kg seed effectively reduced disease transmission. Iprodione (0.1% a.i.) or thiram (0.1% a.i.) added in polyethylene glycol (PEG; filter paper or bubble‐column priming systems) only partially reduced infection. Further dusting of the primed and dried seeds with iprodione, or alternatively application of that fungicide in a polymer film coat as the final stage in the process engineering of carrot seeds, was necessary to achieve complete control. The addition of thiram in the priming fluid, followed by an application of iprodione to the primed and dried seeds, improved the emergence and yield of carrots in the field.