A DISEASE OF BLACKGRAM INVOLVING MELOIDOGYNE JAVANICA AND RHIZOCTONIA BATATICOLA

Abstract

Interaction between Meloidogyne javanica at 500 and 1000 J[sub2] per pot and Rhizoctonia bataticola at 10 and 20 ml mycelium per pot were evaluated on blackgram (Vigna mungo) cv. Pant U-19. In single species inoculation reduction in plant growth, nodulation and yield was significant at both the inoculum levels. In concomitant inoculations the reduction was greater than the additive effect of the pathogens acting independently, indicating a synergistic effect on plant growth, nodulation and yield. Maximum damage was observed when the nematode inoculation preceeded fungal inoculation by ten days. R. bataticola at both inoculum levels adversely affected nematode reproduction and root galling.