Biological control of the insect pests has long been acknowledged as an important pest management component and recognized as well adequate in many cases to abolish the requirement of additional treatment. The biocontrol agents have been productively manipulated with diversity of augmentation and conservation. Production of natural enemies in an efficient and economical way is a pre-requisite for biological control programme. Substantial scientific advances have been made in mass rearing of natural enemies for augmentative population. Nuclear techniques have been used extensively in various...