Abstract
Abstract The most important diseases of soyabeans are reviewed. Bacterial blight (Pseudomonas syringae) and bacterial pustule (Xanthomonas ampelina) are widespread. Anthracnose (Colletotrichum truncatum) causes considerable damage in warmer regions. Charcoal rot (Macrophomina phaseolina) tends to occur when growing conditions are adverse and can be controlled by good agronomic practices. Diaporthe spp. cause pod and stem blight and stem canker which can be controlled by disease-free seed, good cultural practices and fungicides where necessary. Pythium spp. attack soyabeans at the seedling stage. Thanatephorus cucumeris causes various symptoms. Soyabean rust (Phakopsora pachyrhizi) is a serious disease in the East and has been reported to occur in the Caribbean. Mildews are caused by Peronospora manshurica and Microsphaera diffusa. Leaf spot diseases are Cercospora sojina, Septoria glycines and Pleosphaerulina sojicola. Virus diseases and nematodes are also discussed.
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