Janarjan Gautam¹, Ram Prasad Mainali^2,

Rhizome fly (Calobata spp.) is a major insect pest of ginger associated with rhizome rot. A field experiment was conducted at Ginger Research Program (GRP), Salyan (1520 masl) during the year 2013 - 2014 to develop rhizome fly and associated rhizome rot (Pythium sp.) management technology. One insecticide (Chloropyrifos 20 EC) and two fungicides [Diathane M-45 (Mancozeb 80 WP) and Bavistin (Carbendazim 50 DF)] including untreated check (control) were tested solely or in combination against rhizome fly and associated rhizome rot in RCBD with three replications. The overall result revealed that the two-stage application (seed rhizome treatment and soil drenching) and treatments having more combinations of options was found to be better than treatment with single application or having less combinations of options. The combined use of 4 ml Chloropyrifos + 2.5 g DM-45 + 1 g Bavistin per liter of water in two stage i.e. seed rhizome treatment before planting and soil drenching one month after ginger germination, recorded significantly lowest (0.32 mt/ha) rhizome fly infected rhizome and the highest fresh rhizome yield (20.89 mt/ha). It is therefore, recommended that this combination, being efficient to provide maximum protection, can be utilized as a valuable chemical integration in rhizome fly and associated rhizome rot management in ginger.

rhizome rot complex, rhizome fly, chemical integration, ginger, pest management