Pesticides: Pesticides are chemical or biological substances used to prevent, destroy, repel, or mitigate any pest ranging from insects, animals, and weeds to microorganisms such as fungi, moulds, bacteria, and viruses. Pests can be harmful to crops, animals, and even humans, and pesticides play a crucial role in controlling these pests to ensure food security, prevent diseases, and maintain ecological balance.   Insecticides: Insecticides are a subset of pesticides specifically formulated to target and kill insects. They can be used in agriculture to protect crops from insect pests, in public health to control vectors of diseases (like mosquitoes), and in homes and gardens to manage insect infestations.