Journal of Biological Control

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Field experiments were conducted with rice cvs. C043, DT36 and ADT 38 during Kuruvai (June-September); Samba (August- January), and Navarai (January-April) seasons, respectively, to evaluate the efficacy of plant growth promoting rhizobacterium, Pseudomonas fluorescens Migula strain Pf-1 available with Tamil Nadu Agricultural University, Coimbatore, as commercial formulation in the control of the rice ischolar_main nematode Hirschmanniella gracilis (de Man) Luc & Goodey. The biocontrol agent was evaluated as seed treatment and nursery soil application separately and either with or without soil application of carbofuran 3G and compared with soil application of carbofuran 3G @ 1.3 g a. i./m2 and an untreated control for the management of the nematode. Application of the biocontrol agent as seed treatment at a dosage of 10 g/kg of seed was superior to all the treatments. Maximum bacterial colonization and nematode suppression was observed in plants treated with P. fluorescens as seed treatment and it increased yield by 13 per cent.

Keywords

Heterodera spp., Hirschmanniella gracilis, Meloidogyne incognita, Rice.
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