Abstract
Two field trials were conducted in the 1999 and 2000 cropping seasons to determine the effect of planting date and host plant resistance on grain mould and anthracnose, and host plant resistance with fungicides on anthracnose of sorghum in the Nigerian northern Guinea Savanna. Three sorghum varieties were used [SAMSORG 40 (ICSV 111), SAMSORG 4 (KSV 4) (both early maturing and susceptible to anthracnose) and SAMSORG 14 (KSV 8) (medium maturing and resistant to anthracnose)]. Results show that early planting in June and the first 2 weeks of July predisposed susceptible varieties to high level of anthracnose while planting in June predisposed SAMSORG 40 and SAMSORG 4 to high levels of grain mould but gave highest grain yield for the three varieties. The resistant variety SAMSORG 14 was resistant to both anthracnose and grain mould irrespective of planting date. Foliar application with benomyl controlled anthracnose and gave highest yields when combined with seed treatment using metalaxyl+carboxin+furathiocarb (MCF). However, seed treatment alone with MCF did not control anthracnose.
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