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Influence of planting date on plant losses and yield responses of geranium (Pelargonium graveolens) to root rot and wilt

Published online by Cambridge University Press:  27 March 2009

A. Kalra ,
T. N. Parameswaran  and
N. S. Ravindra
A. Kalra
Affiliation:
Central Institute of Medicinal and Aromatic Plants, Regional Centre, Allalasandra, GKVK Post, Bangalore – 560 065, India
T. N. Parameswaran
Affiliation:
Central Institute of Medicinal and Aromatic Plants, Regional Centre, Allalasandra, GKVK Post, Bangalore – 560 065, India
N. S. Ravindra
Affiliation:
Central Institute of Medicinal and Aromatic Plants, Regional Centre, Allalasandra, GKVK Post, Bangalore – 560 065, India
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Summary

Different geranium (Pelargonium graveolens L. Herit) clones differed in susceptibility to root rot and wilt caused by Rhizoctonia solani Kuhn. Reactions were consistent when assessed either by standardized laboratory tests or by pot experiments using 60-day-old well-rooted plants. Plants of an Algerian-type clone (Kd) had a lower survival rate and higher root rot index values than those of a Reunion type (Lo) and an Egyptian type (Eg). Field studies conducted in naturally-infected plots in southern India from 1987 to 1990 showed that summer planting resulted in higher plant losses of all clones than winter planting. As in the laboratory and pot experiments, the Lo and Eg clones sustained less plant loss and produced higher herbage and oil yields than the Kd clones in both field experiments.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 118 , Issue 3 , June 1992 , pp. 309 - 314
Copyright
Copyright © Cambridge University Press 1992

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References

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