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The effect of high temperatures on aqueous suspensions of stem eelworm, Ditylenchus dipsaci (Kühn) Filipjev
Author(s) -
GREEN C. D.
Publication year - 1964
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.1744-7348.1964.tb01202.x
Subject(s) - biology , bulb , acclimatization , horticulture , heat resistance , drop (telecommunication) , agronomy , botany , materials science , telecommunications , computer science , composite material
SUMMARY The relationship between the time and temperature necessary for killing Ditylenchus dipsaci in hot water suggests that the cause of death at 48° is different from that below 46° C. The ability of nematodes, which survived one hot‐water treatment, to recover their resistance so as to survive a second hot‐water treatment and yet to show a susceptibility to storage temperatures which are not lethal to untreated nematodes, supports the view that there are at least two causes of death after heat treatment. Acclimatization increases the heat resistance of the nematodes and would cause failure of hot‐water treatment as a control measure against bulb eelworm. Storage at temperatures of 25–30° C. after hot‐water treatment increases the proportion of dead nematodes and, if applied to bulbs, might improve control. The effects of such temperatures before and after hot‐water treatment are not due to heat shock following the sudden rise or drop in temperature.