Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-26T02:53:06.536Z Has data issue: false hasContentIssue false
  • English
  • Français

Factors Influencing the Emergence of Larvae from Cysts of the Beet eelworm, Heterodera schachtii Schmidt

Published online by Cambridge University Press:  05 June 2009

H. R. Wallace
H. R. Wallace
Affiliation:
School of Agriculture, University of Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

Experiments on larval emergence in a series of constant temperatures showed that, of those temperatures tested, 25°C. was the optimum. Results suggest that constant temperatures do not provide optimum conditions for larval emergence and that a higher rate of emergence may occur under fluctuating temperatures. The rate of larval emergence in beet diffusate increased as the initial oxygen concentration increased. Pre-treatment of cysts at low oxygen concentrations reduced the subsequent emergence in diffusate.

Type
Research Article
Information
Journal of Helminthology , Volume 29 , Issue 1-2 , March 1955 , pp. 3 - 16
Copyright
Copyright © Cambridge University Press 1955

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Baunackk, W., 1922.—“Untersuchungen zur Biologic und Bckampfung ties Rfibenncmatoden Heterodera schachlii Schmidt. Arb. biol. Abt. (Aust.- Reichsauct.), Berl, 11, 185–288. (W.L. 1628.)Google Scholar
Baver, L. D., 1948.—“Soil Physics”. New York.Google Scholar
Bishop, D. D., 1953.—“Hatching the contents of cysts of Heterodera rostochiensis with alternating temperature conditions”. Nature, Lond., 172, 1108. (W.L. 14900.)CrossRefGoogle Scholar
Bovd, A. E. W., 1943.—“Observations on the biology of the potato-root eelworm, Heterodera schachtii Schmidt”. Ann. appl. Biol., 30, 157–161. (W.L. 1025.)Google Scholar
Fenwick, D. W., 1949.—“Investigations on the emergence of larvae from cysts of the potato-root eelworrti Heterodera rostochiensis. 1. Technique and variability”. J. Helminth., 23,. 157–170. (W.L. 11224c.)CrossRefGoogle Scholar
Fenwick, D. W., 1951.—“Investigations on the emergence of larvae from the cysts of the potato-root eelworm Heterodera rostochiensis. 4. Physical conditions and their influence on larval emergence in the laboratory”. J. Helminth., 25, 37–48.CrossRefGoogle Scholar
Godfrey, G. H. and Hoshino, H. M., 1933.—“Studies on certain environmental relations of the root-knot nematode Heterodera radicicola”. Phytopathology, 23, 41–62. (W.L. 16273.)Google Scholar
Kincaid, R. R., 1946.—“Soil factors affecting incidence of root knot”. Soil Set., 61, 101–109. (W.L. 20327.)Google Scholar
Linford, M. B., 1941.—“Some soil-moisture relationships of the root-knot nematode”. Phytopathology, 31, 862. (W.L. 16273.)Google Scholar
Mai, W. F. and Von Mechow, J., 1952.—“Relative humidity in relation to the retention of viability of larvae enclosed in cysts and free larvae of the golden nematode, Heterodera rostochiensis Woll”. Phytopathology, 42, 469.Google Scholar
Russell, E. J., 1950.—“Soil conditions and plant growth”. London.Google Scholar
Triffitt, M. J., 1930.—“On the bionomics of Heterodera schachtii on potatoes, with special reference to the influence of mustard on the escape of the larvae from the cysts”. J. Helminth., 8, 19–48. (W.L. 11224c.)CrossRefGoogle Scholar
Wallace, H. R., 1954.—“Hydrostatic pressure-deficiency and the emergence of larvae from cysts of the beet eelworm”. Nature, Lond., 173, 502–503. (W.L. 14900.)CrossRefGoogle Scholar