Effect of Colletotrichum graminicola on apigeninidin production, yield and yield components in red sorghum (Sorghum bicolor (L.) Moench)

Abstract

This study was carried out to determine the effect of Colletotrichum graminicola on apigeninidin production, yield and yield components in four landraces of red sorghum. Foliar sprays of spore suspension on sorghum leaves infected with pathogen applied in the whorl were used as methods of inoculation in the screen house and field, respectively. General observation on pigment production on the leaves was made. Data were collected on agronomic traits, yield and apigeninidin content. Results show significant differences among the treatments for 100SWT, panicle length and apigeninidin content in the screen house. Significant differences (P<0.05) were observed between the treatments for number of leaves, plant height and seedling vigor on the field. In the screen house, ‘Karan dafi’ had the highest grain yield of 3049.45kg/ha while ‘Malog’ had the highest apigeninidin content (2158.6 mg/L). ‘Malog’ had the highest yield of 5388.89kg/ha on the field while ‘Karan dafi’ had the highest apigeninidin content of 1635.3 mg/L. ‘Karan dafi’ showed stability in yield and apigeninidin content in both environments