ABSTRACT
Currently, herbicides account for 55% of the global market of all pesticides used in crop production. Although the organic herbicides have been playing a major role in providing the food and fibre required by the wor ld population, there has been increasing concern, both real and perceived, about their safety for food products, their adverse impact on environment and widespread weed resistance to herbicides. These factors, coupled w i t h rising prohibitive costs of developing, testing and registering synthetic materials as herbicides, have provided the impetus to develop alternative weed man agement strategies. In this context, biological control as an alternative or supplemental weed management method appears to play a major role in agricultural production systems.
