Management of nematodes in banana through bio-rationale approaches

N SEENIVASAN, S K MANORANJITHAM, J AUXILIA, K SOORIANATHASUNDARAM

Abstract


Studies were undertaken to determine the efficacy of different bio-rationale approaches in managing the incidence of  burrowing  nematode, Radopholus  similis  and  spiral  nematode, Helicotylenchus multicinctus  in  banana  under  field conditions. The bio-rationale treatments included  sucker dip with neem oil (1.5 %), soil application of pressmud at the rate of   5 kg/plant, neem cake at the rate of   500 g/plant, vermicompost at the rate of   250 g/plant, growing marigold (Tagetes errecta) around the basin and growing coriander (Coriandrum sativum) around the basin which were compared with chemical check carbofuran 3G at the rate of  40 g/plant and untreated control. The study revealed the superiority of the marigold and neem cake treatments in reducing nematode population significantly and increasing banana bunch yield on par with chemical check with 18.3 - 24.6 per cent over the untreated control. High rate of multiplication of bacterial feeding nematodes Rhabditis spp. and predatory nematode, Mononchus spp. were observed  in  these  treatments. The economic returns were also higher with incremental benefit- cost ratio of 16.8 and 12.5 in marigold and neem cake treatments respectively.


Keywords


Banana nematode; bio-rationale; management

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