Influence of water management on tolerance of rice cultivars for Meloidogyne graminicola

Abstract

Among fifteen rice cultivars tested for their susceptibility to Meloidogyne graminicola under flooded conditions, IR72 was the most resistant, IR29 was the most susceptible, and others cultivars such as IR36 and IR74 showed an intermediate response. The multiplication of M. graminicola on IR29, IR36, IR72 and IR74 and its effect on their yield were tested under simulated rainfed upland and flooded conditions. Greater number of juveniles were recorded from the roots when these cultivars were grown in flooded soil than under rainfed conditions. Yield reductions by more than 20% were observed under rainfed conditions with IR29 and IR74. The same cultivars were tolerant and their yield was not affected when they were grown in flooded soil. IR36 and IR72 were tolerant under both water management systems. These results suggest that the tolerance level of rice cultivars to M. graminicola vary with the water management system under which they are tested.

Source or Periodical Title

Fundamental and Applied Nematology

ISSN

11645571

Page

189-192

Document Type

Article

Subject

Flooding, Meloidogyne graminicola, resistance, rice, tolerance, water management

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