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Host range and morphological studies on four isolates of Aphelenchoides besseyi christie Rajan, Lal Arjun, Mathur V.K. Plant Quarantine Division, National Bureau of Plant Genetic Resources, IARI Campus, New Delhi-110 012. Abstract Studies were carried out on host range (fungal hosts) and morphometrics of four geographically isolated populations of Aphelenchoides besseyi. The comparison of morphometric data showed significant differences between populations. Cuttack population (from eastern India) and Pune population (from western India) formed one group while Hyderabad (from southern India) and Philippines isolates formed another group on the basis of certain similarities. Differences in morphometrics were also observed between populations of these isolates obtained from fungal cultures raised under similar conditions. In differential host test studies-only Hyderabad isolate multiplied on Curvularia clavata, but it failed to multiply on C. andropogonis and Phoma tropica, suggesting thereby the occurrence of atleast two physiological races in A. besseyi. Top Key words Host range, morphometrics, Aphelenchoides besseyi. Top | | |
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