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A TEMPERATURE STUDY OF PYTHIUM ATTACK ON SWEDE SEEDLINGS
Author(s) -
GREEVES T. N.,
MUSKETT A. E.
Publication year - 1936
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.1744-7348.1936.tb05567.x
Subject(s) - biology , damping off , seedling , germination , sowing , horticulture , pythium , botany , agronomy
SUMMARY1 The type of seedling disease caused by Pyihium attack on swede seedlings is closely correlated with the temperature under which the plants are raised. Low temperature conditions favour the occurrence of the pre‐emergence phase of disease and produce no damping‐off. Medium temperatures also produce no damping‐off and result in a big reduction in the pre‐emergence phase. High temperatures show the pre‐emergence phase at a minimum but encourage damping‐off. 2 The disease in general is likely to be best evaded by germinating the seed under conditions of high temperature until the emergence of the seedlings. The temperature should then be lowered in order to encourage the production of sturdy seedlings not likely to be subject to damping‐off. 3 In these experiments the disinfection of the seed with an organic mercury compound prior to sowing did not secure any control of the disease. 4 The two varieties of swede used–Tipperary and Ideal–proved to be equally susceptible to the disease.