Why Bee Populations Face Extinction: The Decline, the Pesticides, and the Food We Stand to Lose

A single honeybee colony can contain up to 80,000 workers. In the United States alone, beekeepers lost an estimated 45.5% of managed honeybee colonies in 2022 to 23, according to the Bee Informed Partnership, one of the highest annual losses on record. Europe has seen wild bee populations drop by more than 25% over the past three decades. In India, the western honeybee (Apis mellifera) and the indigenous Apis cerana have both seen range contractions, with the Indian Council of Agricultural Research flagging pollinator decline as a direct threat to horticultural output in states like Himachal Pradesh, Uttarakhand, and parts of the Northeast.

The biological fact that makes this alarming: bees are not incidental to plant reproduction. They are the mechanism. About 75% of the world's flowering crops depend on animal pollination, and bees perform the vast majority of that work. A bee carries pollen from anther to stigma on thousands of flowers in a single foraging trip, a precision that wind pollination cannot replicate for most food crops.

No single cause explains the collapse, but pesticides sit at the top of every serious analysis. Neonicotinoids, a class of systemic insecticides absorbed into every part of a plant, including its pollen and nectar, have been shown in peer-reviewed research published in Science (2017) to impair bee navigation, reduce queen fertility, and shrink colony size. The European Union banned outdoor use of three major neonicotinoids in 2018. India has not implemented equivalent restrictions, and neonicotinoid use on cotton, rice, and vegetable crops continues at scale.

Habitat loss compounds the pesticide problem. As monoculture farming expands, the wildflower margins and hedgerows that bees depend on for diverse forage disappear. A bee foraging on a single crop, say, a field of Bt cotton, gets a narrow nutritional profile that weakens its immune system. Varroa destructor, a parasitic mite that feeds on bee larvae and transmits viruses, then finds compromised colonies easy to devastate. Climate disruption adds a further layer: warmer winters in temperate zones disrupt the dormancy cycles that colonies rely on to conserve energy, and erratic monsoons in India shift flowering periods out of sync with bee foraging patterns.

Mango, cucumber, watermelon, bottle gourd, sunflower, mustard, cardamom, and coffee all depend heavily on bee pollination. Mustard alone covers roughly 6.7 million hectares in India and is the country's primary edible oil crop, its yield drops by 30 to 40% without adequate pollination, according to research from the National Bee Research and Training Institute in Pune. Cardamom, grown in Kerala and Karnataka, requires Apis dorsata (the giant honeybee) for effective pollination; the decline of this species in forest-adjacent farms has already been documented by growers in Idukki district. The economic exposure is not abstract. India's horticultural sector is worth over Rs 2.3 lakh crore annually, and a significant portion of that value rests on pollination services that cost farmers nothing, as long as bees exist.

Rice and wheat, staple grains that are wind-pollinated, would survive. Everything else becomes uncertain. Almonds are 100% dependent on bee pollination, California's almond industry, which supplies most of the world's almonds including India's import market, already trucks in billions of bees each February in what amounts to a managed pollination emergency. Without bees: no almonds, severely reduced yields of apples, pears, and stone fruits, near-total loss of most berries, and collapse of oilseed crops that underpin cooking oil supply. Honey disappears entirely, obviously. But the downstream effects reach further, bees pollinate the plants that feed livestock, so dairy and meat production would contract too. The diet that remains would be calorie-sufficient but nutritionally narrow: grains, root vegetables, and little else.

Several Indian states have begun integrating apiculture into agricultural extension programmes, and the National Bee Board under the Ministry of Agriculture has pushed for increased hive density in orchard districts. Some progress is real. But the structural problem, that pesticide regulation has not caught up with the evidence on neonicotinoids, remains unresolved. Organic farming clusters in Sikkim and parts of Andhra Pradesh show that bee populations stabilise when systemic pesticide use drops. Habitat corridors planted with native flowering species have shown measurable colony recovery in European trials. These are not small or cheap interventions; they require coordinated land-use policy, not just individual farmer choices.

The bees are not waiting for the policy cycle to complete. Colony collapse disorder, first named in the United States in 2006, has since been documented in Europe, Asia, and parts of South America. The pattern is consistent: colonies that appear healthy vanish almost overnight, leaving behind honey, brood, and a queen but no workers. The mechanism is still debated, but the contributing factors, pesticides, pathogens, poor nutrition, stress, are well established.

The food system was built on the assumption that pollination would always be free, abundant, and self-sustaining. Bees made that assumption safe to hold for centuries. The colonies disappearing now are not a warning that the assumption might fail, they are evidence that it already has.