Incidence of Corynespora leaf spot on Blackgram with other foliar diseases

A field experiment was conducted to study the incidence of corynespora leaf spot of blackgram (Corynespora cassiicola) with other foliar diseases during kharif and rabi 2012-13 at Regional Agricultural Research Station, Lam, Guntur, Andhra Pradesh. There was a significant and positive correlation between powdery mildew and corynespora leaf spot incidence during kharif 2012-13 whereas, PDI also had positive correlation with powdery mildew and MYMV (Mungbean Yellow Mosaic Virus) though it is non significant but MYMV and leaf crinkle diseases showed negative correlation with corynespora leaf spot incidence. There was a negatively significant correlation between corynespora leaf spot and powdery mildew disease during rabi.