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Rosette formation by Heterorhabditis bacteriophora

Rosette formation by Heterorhabditis bacteriophora 117 associated with the grey discolouration described. Ascochyta pinodella Jones can cause stem blackening in peas (Jones 1927) and although it was responsible for the loss of the occasional seedling ( < 1 %), 60 days after drilling no plants were affected. Despite the presence of the other pathogenic organisms, there was a large probability that grey discolouration of the lower stem was associated with Ditylenchus dipsaci; similar symptoms were noted on field beans (Hooper, 1971 ). My work suggests that assessing symptoms is a simple and speedy way of judg- ing the degree of infestation of pea crops by D. dipsaci which could be useful in field experiments, surveys and advisory work. I thank Dr. C. D. Green, National Vegetable Research Station and Mr. E. B. Dennis, ADAS who supervised my work and Catherine Williamson for identifying the stem nematode. REFERENCES BUNT, J. A. (1975). Effect and mode of action of some systemic nematicides Mededelingen Landbouwhogeschool Wageningen, 75-10, pp 128. HOOPER, D. J. (1971). Stem eelworm (Ditylenchus dipsaci), a seed and soilborne pathogen of field beans (Vicia faba) Plant Pathology 20 25-27. JONES, L. K. (1927). Studies of the nature and control of blight, leaf spot and http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Rosette formation by Heterorhabditis bacteriophora

Pye, A.E.; Burman, M.
Nematologica , Volume 27 (1): 3 – Jan 1, 1981
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529281X00133
Publisher site
See Article on Publisher Site

Abstract

117 associated with the grey discolouration described. Ascochyta pinodella Jones can cause stem blackening in peas (Jones 1927) and although it was responsible for the loss of the occasional seedling ( < 1 %), 60 days after drilling no plants were affected. Despite the presence of the other pathogenic organisms, there was a large probability that grey discolouration of the lower stem was associated with Ditylenchus dipsaci; similar symptoms were noted on field beans (Hooper, 1971 ). My work suggests that assessing symptoms is a simple and speedy way of judg- ing the degree of infestation of pea crops by D. dipsaci which could be useful in field experiments, surveys and advisory work. I thank Dr. C. D. Green, National Vegetable Research Station and Mr. E. B. Dennis, ADAS who supervised my work and Catherine Williamson for identifying the stem nematode. REFERENCES BUNT, J. A. (1975). Effect and mode of action of some systemic nematicides Mededelingen Landbouwhogeschool Wageningen, 75-10, pp 128. HOOPER, D. J. (1971). Stem eelworm (Ditylenchus dipsaci), a seed and soilborne pathogen of field beans (Vicia faba) Plant Pathology 20 25-27. JONES, L. K. (1927). Studies of the nature and control of blight, leaf spot and

Journal

Nematologica – Brill

Published: Jan 1, 1981

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