Insecticide/Homicide?

Scientists reckon that around 400,000 species of insect are currently threatened with extinction largely by the overuse of man-made insecticides (https://www.theguardian.com/environment/2019/nov/13/insect-apocalypse-poses-risk-to-all-life-on-earth-conservationists-warn). Even worse, they are of the opinion that the loss of these important pollinators and food items will challenge the existence of many other species including we humans.