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Observations On the Susceptibility of Chrysanthemum Varieties Infested At Two Different Times With Chrysanthemum Eelworm, Aphelenchoides Rit ...

Observations On the Susceptibility of Chrysanthemum Varieties Infested At Two Different Times... OBSERVATIONS ON THE SUSCEPTIBILITY OF CHRYSANTHEMUM VARIETIES INFESTED AT TWO DIFFERENT TIMES WITH CHRYS- ANTHEMUM EELWORM, APHELENCHOIDES RITZEMABOSI BY J. J. HESLING and H. R. WALLACE Rothamsted Experimental Station, Harpenden, Herts, England The susceptibilities of different varieties of chrysanthemum to Aphelenchoides ritzemahosi, assessed from a field experiment in 1959, were confirmed by repetition of the experiments at two different sites in 1960 when there was a higher seasonal rainfall than in the previous year. Many plants infested in March were subsequently destroyed by eelworm whereas infestations in August had no effect on the crop of blooms although eelworm symptoms were present. In resistant varieties infested in August there was no spread of symptoms because the infested leaves were killed before the eelworms could multiply and spread. Cuttings of resistant varieties, which are hypersensitive to eelworm attack, were often killed. Hesling & Wallace ( 1960 ) showed that there were differences in susceptibility to eelworm between varieties of chrysanthemum. The differences were found in the dry season of 1959 (Rothamsted rainfall, May to September inclusive, 22.2 cm) and, because weather conditions influence the degree of eelworm infes- tation, some of the varieties were retested in the wetter season of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Observations On the Susceptibility of Chrysanthemum Varieties Infested At Two Different Times With Chrysanthemum Eelworm, Aphelenchoides Rit ...

Hesling, J.J.; Wallace, H.R.
Nematologica , Volume 6 (1): 5 – Jan 1, 1961
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529261X00298
Publisher site
See Article on Publisher Site

Abstract

OBSERVATIONS ON THE SUSCEPTIBILITY OF CHRYSANTHEMUM VARIETIES INFESTED AT TWO DIFFERENT TIMES WITH CHRYS- ANTHEMUM EELWORM, APHELENCHOIDES RITZEMABOSI BY J. J. HESLING and H. R. WALLACE Rothamsted Experimental Station, Harpenden, Herts, England The susceptibilities of different varieties of chrysanthemum to Aphelenchoides ritzemahosi, assessed from a field experiment in 1959, were confirmed by repetition of the experiments at two different sites in 1960 when there was a higher seasonal rainfall than in the previous year. Many plants infested in March were subsequently destroyed by eelworm whereas infestations in August had no effect on the crop of blooms although eelworm symptoms were present. In resistant varieties infested in August there was no spread of symptoms because the infested leaves were killed before the eelworms could multiply and spread. Cuttings of resistant varieties, which are hypersensitive to eelworm attack, were often killed. Hesling & Wallace ( 1960 ) showed that there were differences in susceptibility to eelworm between varieties of chrysanthemum. The differences were found in the dry season of 1959 (Rothamsted rainfall, May to September inclusive, 22.2 cm) and, because weather conditions influence the degree of eelworm infes- tation, some of the varieties were retested in the wetter season of

Journal

Nematologica – Brill

Published: Jan 1, 1961

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