Haw the Host plants variability affects pests

Crop plants are affected by large number of pest species which have harmful effects on quality and yield. Chemical pesticides have affected these pests which become resistant and difficult to control . The need for biological control has increased, growers buy and release predatory mites on crops, but the predators disperse away or not reproduce making frequent releases necessary, which are expensive. Therefore, methods to enhance establishment and reproducing population of predators for pest inhibition for long time are needed. One of the effective methods is the use of biocontrol plants such as banker plants.