Physical control is one of the main approaches to crop protection against insects the others being chemical biological and cultural table i from theoretical and technical points of view all of these approaches have limits that make them more or . Biological control or biocontrol is a method of controlling pests such as insects mites weeds and plant diseases using other organisms it relies on predation parasitism herbivory or other natural mechanisms but typically also involves an active human management role. The sterile insect technique sit is a biologically based method for the control of key insect pests wild female insects inseminated by released radiation sterilized males do not reproduce and repeated releases of the sterilized insects lead to a reduction in pest population numbers effective . The sterile insect technique sit is a method of biological insect control whereby overwhelming numbers of sterile insects are released into the wild the released insects are preferably male as this is more cost effective and the females may in some situations cause damage by laying eggs in the crop or in the case of mosquitoes taking
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