Chemical Control of Rhizoctonia Species

Ever since the destructive potential of Rhizoctonia pathogens on crop plants was realized, application of synthetic fungicides has been the most popular disease control measure employed by the farmers on various crops and the use of fungicides is practiced widely throughout the world. Even today many farmers will select disease-prone and high-yielding varieties and rely totally on fungicide treatments to maintain crop health. Disease control with fungicides has been largely successful against Rhizoctonia pathogens on many different crops in both temperate and tropical agro-ecological regions, attributable to targeted development of a variety of potent fungicides of diverse chemical nature and appropriate application methods against various Rhizoctonia diseases. But disease control with recommended anti-Rhizoctonia fungicides has not always been successful in some situations, and failures to control Rhizoctonia diseases on the same or different crop in an agro-ecological region are also documented in the literature, contrary to general belief that a potent fungicide shall curb the pathogen under all situations. The reasons for such diversity in results for satisfactory disease control are many and intricate, but have hardly been reasoned out scientifically. The purity of fungicides, their formulations and their improper usage have often been the alibi for extension workers to console the cultivators for poor disease control with the tested anti-Rhizoctonia fungicides. This contention is strongly discounted by the information generated from studies on quadrangular interactions of host-pathogen-fungicide-environment in the control of Rhizoctonia diseases. Recent progress in taxonomy and ecological diversity of population structures of Rhizoctonia pathogens in major cropping systems has greatly helped to understand the possible practical reasons for the effectiveness or ineffectiveness of fungicides to control Rhizoctonia in the fields.

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Authors and Affiliations

  1. IRRI-India Liaison Office, International Rice Research Institute, C-18 Friends Colony (East), New Delhi, 110 065, India Hans R. Kataria
  2. Sandoz Agro Limited, Agrobiological Research Station, CH-4108, Witterswil, Switzerland Ulrich Gisi
  1. Hans R. Kataria
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Editors and Affiliations

  1. Tel Aviv University, Ramat Aviv, Tel Aviv, Israel Baruch Sneh
  2. McDonald Campus, McGill University, Quebec, Canada Suha Jabaji-Hare
  3. CSIRO, Division of Soils, Adelaide, South Australia, Australia Stephen Neate
  4. Research Institute for Plant Protection (IPO-DLO), Wageningen, The Netherlands Gerda Dijst

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© 1996 Springer Science+Business Media Dordrecht

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Kataria, H.R., Gisi, U. (1996). Chemical Control of Rhizoctonia Species. In: Sneh, B., Jabaji-Hare, S., Neate, S., Dijst, G. (eds) Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Disease Control. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2901-7_49

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