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Potato Root Eelworm, D-D, and Soil Sterilization. I. Methods and Criteria

Published online by Cambridge University Press:  18 November 2009

B. G. Peters
B. G. Peters
Affiliation:
Nematology Department, Rothamsted Experimental Station, Harpenden.
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Extract

Methods are described whereby a factorial experiment was set up to test the effects on 40 potato plants, growing in 15 Kg. pots of soil, of the three factors: (S) steam sterilization of soil, (H) infection of soil with about three million eggs ard larvae of Heterodera rostochiensis per pot, and (D) injection of soil with 10 ml. of D-D per pot.

Data from the infected half of the pots were also used to test the effects of factors (S) and (D) on the eelworm population.

The data from 10 plant criteria yielded three statistics: the variance ratio (F), the coefficient of variability (V), and the Normal difference (t) corresponding to each factor and interaction. From an examination of these, the following two criteria are selected as, between them, displaying all the significant treatment effects of the experiment:

Type
Research Papers
Information
Journal of Helminthology , Volume 22 , Issue 3-4 , December 1948 , pp. 117 - 127
Copyright
Copyright © Cambridge University Press 1948

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