The HCN content of peach plants and the effect of this and other substances formed from peach root residues on growth of peach trees and on soil microorganisms were investigated. Peach root bark contained appreciable amounts of HCN. HCN was released from live roots after mechanical injury. Benzaldehyde and KCN were toxic to rooted peach trees in the greenhouse and they inhibited respiration of peach root tips. A similar suppression of respiration was caused by benzoic acid, mandelonitrile, and water extracts of peach root bark incubated in peach and non-peach soils. Extracts from peach soil caused greater inhibition to respiration of peach root tips than extracts from non-peach soil.
KCN, mandelonitrile, benzaldehyde, peach root bark, and amygdalin reduced the total micro-organism, actinomycete, pythium, and pathogenic nematode population of an old peach soil.
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Association of Official Agricultural Chemists. Official and Tentative Methods of Analysis. 5th. ed. Washington (1950).
Gilmore, A. E., Growth of replanted peach trees. Proc. Am. Soc. Hort. Sci. 73, 99–111 (1959)
Gortner, R. A., and Gortner, W. A., Outlines of Biochemistry. John Wiley and Sons, Inc. New York, and Chapman and Hall Limited, London (1949).
Harris, L. and Gilkeson, Anna L., Toxicity of peach roots. Proc. Am Soc. Hort. Sci. 50, 203–205 (1947).
Hendrix, Floyd F.Jr. and Kuhlman, E. G., Factors affecting direct recovery of Phytophthora cinnamomi from soil. Phytopathol. 55, 1183–1187 (1965).
Hendrix, Floyd F.Jr. and Powell, W. M., Control of root pathogens in peach tree decline sites. Univ. Georgia Agr. Expt. Sta. Bull. 77, 28–29 (1970).
Hildebrand, E. M., Peach root toxicity in a New York orchard. Plant Diseases Reptr. 45, 462–465 (1945).
Jenkins, W. R., A rapid centrifugal flotation technique for separating nemotades from soil. Plant Diseases Reptr. 48, 892 (1964).
Koch, L. W., The peach replant problem in Ontario. 1. Symptomatology and distribution. Can. J. Botany 33, 650–661 (1955).
Patrick, Z. A., The peach replant problem in Ontario. 11. Toxic substances from microbial decomposition products of peach root residues. Can. J. Botany 33, 461–468 (1955).
Pramer, D. and Schmidt, E. L., Experimental Soil Microbiology. Burgess Publishing Co., Minneapolis, Minn. (1964).
Proebsting, E. F. and Gilmore, A. E., The relation of peach root toxicity to reestablishment of peach orchards. Proc. Am. Soc. Hort. Sci. 38, 21–26 (1941).
Savage, E. F. and Cowart, F. F., Factors affecting peach tree longevity in Georgia. Proc. Am. Soc. Hort. Sci. 51, 81–85 (1954).
Umbreit, W. W., Burris, R. H., and Stauffer, J. F., Manometric Techniques. 4th ed. Burgess Publishing Company, Minneapolis, Minn. (1964).
Ward, G. M., and Durkee, A. B., The peach replant problem in Ontario. III. Amygdalin content of Peach tree tissues. Can. J. Botany 34, 419–422 (1956).
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Israel, D.W., Giddens, J.E. & Powell, W.W. The toxicity of peach tree roots. Plant Soil 39, 103–112 (1973). https://doi.org/10.1007/BF00018049
- Benzoic Acid
- Soil Microorganism