Integrated management of cercospora leaf spots and yellow mosaic of urdbean (Vigna mungo)

A study was conducted during rainy season of 2003 and 2004 for the management of cercospora leaf spots (C. canescens and Pseudocercospora cruenta) and yellow mosaic (Mungbean yellow mosaic virus) of urdbean (Vigna inungo (L.) fiepper) by integrating insecticides, fungicides and fungal bioagent as seed treatment and foliar spray. The combination of seed soaking in 0.1% imidacloprid 17.8%SL for 2hr and dry seed treatment with carbenclazint 50WP + tetra methyl thiurarn disulphide (TMTD) 75WP (1:1) @ 2g/kg seed followed by foliar sprays of 0.02% imidacloprid and 0.05% carbendazim at 30 and 45 days after sowing respectively was the best treatment to minimize intensity of cercospora leaf spots (4.3%) and yellow mosaic (MYMV) (9.5%) resulting in maximum grain yield (954.2 kg/ha). Seed germination percentage of this interaction was also significantly superior over the control. Prior to field experiment the biological compatibility of imiclacloprid and thiamethoxam with carbenclazirn + TMTD for seed treatment was tested in vitro and their combination supported maximum seedling vigour.