🌾 Insects and food systems

Insects affect farming in two very different ways, helpful pollinators increase how much fruit and seed a crop produces, while pest insects can damage or destroy entire fields of plants if left unchecked. Farmers spend enormous effort trying to encourage the helpful insects while managing the harmful ones, since removing all insects entirely would actually backfire and hurt harvests. Understanding which insects help and which harm a specific crop has become an entire branch of science that shapes how modern farms are managed.

Many crops simply cannot produce fruit or seeds without pollinators moving pollen between flowers, which means a farmer's entire harvest of certain crops depends directly on enough insects visiting at exactly the right time. Some farmers even rent beehives, trucking them from farm to farm to make sure crops get pollinated during their short flowering window. Losing wild pollinators in an area can force farmers into this kind of expensive, managed pollination just to keep producing the same amount of food as before.

Insects are already a regular food source for roughly two billion people around the world, eaten in countless traditional dishes across Asia, Africa and Latin America, often roasted, fried or ground into flour. Compared to raising cattle or pigs, farming insects for food generally uses far less land, water and feed to produce the same amount of protein. Many scientists see insects as a promising part of feeding a growing world population sustainably, even in places where eating bugs is not yet common.

Pesticides are chemicals farmers spray to kill insects that damage crops, but many of them cannot tell the difference between a harmful pest and a helpful pollinator, killing both indiscriminately. Some pesticides also linger in soil and water long after spraying, continuing to affect insects, and sometimes birds and other animals, well beyond the original field. Scientists and farmers are increasingly searching for more targeted approaches, ones that protect crops while causing far less harm to the beneficial insects nearby.