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A DISEASE OF CHERRY LAUREL CAUSED BY TROCHILA LAUROCERASI (DESM.) FR
Author(s) -
GREGOR MARY J. F.
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.tb06121.x
Subject(s) - biology , horticulture , spring (device) , disease control , botany , microbiology and biotechnology , engineering , mechanical engineering
SUMMARY A leaf spot disease of cherry laurel is described. The infected areas eventually become occluded and fall out, leaving irregular holes in the foliage. The disease is caused by Trochila Laurocerasi (Desm.) Fr., the imperfect stage of which is proved to be Gloeosporium‐phacidiellum Grove. Infection takes place on the young leaves, most commonly through wounds, and a moist atmosphere is essential for the development and spread of the disease. Control can be effected by spraying with colloidal sulphur during spring and early summer, and by cutting back the bushes only in the autumn, not at short intervals during the summer as is frequently the practice. The writer wishes to acknowledge her indebtedness to Dr G. H. Pethybridge for valuable suggestions during the course of this work, also to Dr C. E. Foister for the photographs reproduced on PL XXXI.