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POPULATION DENSITY AS A CRITERION FOR EVALUATING VARIETAL RESISTANCE OF CASTOR (Ricinus communis LINN.) TO JASSID INFESTATION

  • Author:M. STEPHEN DORAIRAJ, V. SAVITHRI and S. G. AIYADURAI

    p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:50, Issue:feb-feb

    DOI: https://doi.org/10.29321/MAJ.10.A03924
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Abstract

                                Investigations were taken up to assess the degree of relationship of the jassid population with the varied types of waxy bloom coatings and stem colours of castor. Jassid population counts were recorded on a total of seventy- six varieties of castor maintained at the Agricultural Research Institute, Coimbatore during 1961-62 monsoon season.

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ISSN : 0024-9602
eISSN : 2582-5321

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