Food production requires adequate assurance against the havoc caused by insects. This has lead to the short sighted, unilateral and almost exclusive employment of synthetic chemicals for insect pest control. Application of these broad - spectrum pesticides results in environmental pollution by chemical residues or their immediate harmful action on non-target species. Therefore, the development of new and alternative environmentally friendly control agents with greater emphasis on, and a wider role for biological control is urgently needed. Microbiological control includes all aspects of the...