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Aerated‐steam treatment for control of Alter nana tenuis on lobelia seed
Author(s) -
HALL T. J.,
TAYLOR G. S.
Publication year - 1983
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.1744-7348.1983.tb02758.x
Subject(s) - biology , thiram , germination , blight , seedling , damping off , horticulture , seed treatment , campanulaceae , aeration , botany , fungicide , agronomy , ecology
SUMMARY Alternaria tenuis may cause severe seedling blight, damping‐off and leaf spotting of the bedding plant lobelia. Disease transmission from seed naturally and artificially infected by A. tenuis was demonstrated and the pathogenicity of four isolates established. Soaking of lobelia seed in 0–2% thiram suspension at 30 o C for 12 h adversely affected the rate of germination and did not consistently reduce infection to acceptable levels. Treatment with aerated steam at 50–51 o C for 15–20 min reduced seed infection to undetectable or insignificant levels and caused only slight damage to the seed. In glasshouse trials seed treated with aerated steam performed significantly better than seed soaked in thiram suspension both in terms of germination and foliage production.