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Observations on the Biology and Control of Stem Eelworm ( Ditylenchus dipsaci (Kühn) Filipjev) on Hydrangea ( Hydrangea macrophylla Ser.)
Author(s) -
French N.,
John M. E.,
Williams J. J. W.
Publication year - 1971
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.1365-3059.1971.tb00541.x
Subject(s) - biology , phytotoxicity , horticulture , botany
SUMMARY The life cycle of Ditylenchus dipsaci in hydrangea is similar to that in other plants: eggs hatched in about eight days and adults developed in 12 days at 19°C. The eelworms infesting hydrangea were shown to be of an oat‐onion race. Hot‐water treatment killed the plants before achieving complete control. Thionazin soil drenches at 0.02 per cent and 0.03 per cent gave good control of eelworm but 0.005 per cent and 0.01 per cent failed to give satisfactory control in some experiments. The higher rates caused some phytotoxicity particularly to rooted cuttings and forced plants. Thionazin 10 per cent granules at 2 oz per bushel (56.7 g per 36.4 1.) of compost caused very severe phytotoxicity.