Investigations on the Emergence of Larvae from Cysts of the Potato-root Eelworm Heterodera rostochiensis. I. Technique and Variability
- 1 December 1949
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Helminthology
- Vol. 23 (3-4), 157-170
- https://doi.org/10.1017/s0022149x0003248x
Abstract
Fifteen lots of fifty individual cysts from three separate batches were exposed to the action of potato root diffusate, the hatching allowed to continue to completion and the total larvae liberated from each cyst were counted. The data obtained were analysed both as they stood and after three different transformations for variability, as well as for independence between mean and variance. Very high variability corresponding to a coefficient of variation of 1.00 was detected, and there was, moreover, a very significant correlation between mean and variance. The most suitable transformations appeared to be either logarithmic or angular—the latter being probably the more useful. The latter, moreover, tended to increase the sensitivity of analysis. The importance of residual counts when hatching is complete is emphasized even in the absence of an angular transformation of the data.Keywords
This publication has 2 references indexed in Scilit:
- A Refinement of Gemmell's single cyst techniqueJournal of Helminthology, 1943
- On the Bionomics of Heterodera schachtii on Potatoes, with Special Reference to the Influence of Mustard on the Escape of the Larvae from the CystsJournal of Helminthology, 1930