A summary of the general characteristics of viruses is followed by sections on six common cereal viruses: Barley Yellow Dwarf Virus (BYDV), Soilborne Wheat Mosaic Virus (SBWMV), Wheat Streak Mosaic Virus (WSMV), Brome ...

A general description of aphids and their life cycle is supplemented by color diagrams. Color photographs of six common cereal aphids (Rhopalosiphum padi, Rhopalosiphum maidis, Sitobion avenae, Schizaphis graminum, ...