Indian Journal of Nematology
Year : 2010, Volume : 40, Issue : 1
First page : ( 60) Last page : ( 62)
Print ISSN : 0303-6960. Online ISSN : 0974-4444.

Distribution and Risk Analysis of Rice-Root Nematode, Hirschmanniella oryzaein India

Sehgal Mukesh, Kalra Naveen¹

National Centre for Integrated Pest Management, L.B.S. Building, Pusa Campus, New Delhi-110 012, India

¹Division of Agricultural Physics, Indian Agricultural Research Institute, New Delhi-110 012, India

Accepted:  May,  2010.

Abstract

Rice-root-nematode, Hirschmanniella oryzae is an economically important pest of rice widely distributed in rice growing tracts of India, especially the low land irrigated paddy. Based on intensive surveys conducted in different states/regions of country distribution maps of rice-root nematode, Hirschemanniella oryzae has been developed. The distribution map depicts the most infested as well as nematode free area. A definite trend has been found out to predict the level of this nematode population during any year using surplus or deficit rainfall of different months and this has justified the severity/risk of occurrence of this nematode.

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Keywords

Hirschemanniella oryzae, Hot-spot, Risk analysis.

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