sentence: People often use poisons called insecticides to kill pest insects.
sentences_after: Insecticides do not always work. Sometimes the pest insects become resistant to the insecticides, which means the insecticides do not hurt them anymore. Both the Colorado potato beetle and the diamondback moth are insects that are resistant to many insecticides.
concept_name: People
headings: Insect Insects and people Pesticides
categories: Basic English 850 words