Succession of insect pests and their natural enemies on Soybean, Glycine max (L.)

Results revealed that green semilooper (Chrysodeixis acuta), tobacco caterpillar (Spodoptera litura), green stink bug (Nezara viridula) and soybean beetle (unidentified) were the main pests which appeared at various stages of growth of soybeen damaged the crop similtaneously three natural enemies viz; lady bird beetle (Cheilomenes sexmaculatus), predatory bug (Podisus maculiventris) and entomopathegenic fungus (Beauveria bassiana) were also recorded. Among them, the soybean beetle appeared at seedling stage and green semilooper and tobacco caterpillar appeared at vegetative stage and continued infesting the crop up to maturity. Green stink bug appeared at reproductive stage of the crop and soybean beetle appeared in the 30^th standared week. Among natural enemies, the lady bird beetle was observed predating on white fly and aphids whereas, predatory bug was appeared on green semilooper and tobacco caterpillar when the crop was about 60 days old. The next natural enemy B. bassiana was observed on green semilooper and tobacco caterpillar at 67 to 74 days old crop.