Influence of variety and intra-row spacing on Cercospora leaf spot disease of groundnut in Bauchi, Nigeria.

摘要

The incidence of Cercospora leaf spot (Cercospora sp.) in 10 diverse groundnut cultivars grown under varying intra-row spacing (20 and 30 cm) was studied during the rainy seasons of 1998 and 1999 in Bauchi, Nigeria. Significantly (P<0.01) lower incidence and severity of Cercospora leaf spot were obtained at a 50x30 cm intra-row spacing. A spacing of 50x20 cm encouraged the development of the disease. Late-maturing cultivars of the spreading type were resistant, whereas erect and early-maturing cultivars were susceptible. Progress in the infection of groundnut by Cercospora leaf spot was affected by greater rainfall and relative humidity, and low temperatures..