Honeybees

It’s a simple idea: Stop mowing your lawn in the month of May to let flowers in the lawn, such as dandelions and clover, grow and support bees and other pollinators. “No Mow May” was started in 2019 by Plantlife, a conservation charity based in the United Kingdom, in response to a well-documented loss of meadows and an alarming decline of native plants and animals there. Since then, it has been taken up by many gardeners and conservation advocates in North America. Studies have shown that many flowers that grow in unmown British lawns do support British pollinators. But North America has vastly different ecological communities, composed of unique flora and fauna. If you are interested in supporting pollinators, it is important to consider the ecological context of your yard – and #NoMowMay may not be an effective strategy. As entomology researchers who run programs on pollinators, we see better ways for people in North America to help pollinators fl...

Bees help pollinate over a third of the world’s crops, contributing an estimated US$235 billion to $577 billion in value to global agriculture. They also face a myriad of stresses, including pathogens and parasites, loss of suitable food sources and habitat, air pollution and climate-driven weather extremes. A recent study has identified another important but understudied pressure on bees: “inert” ingredients in pesticides. All pesticide products in the U.S. contain active and inert ingredients. Active ingredients are designed to kill or control a specific insect, weed or fungus and are listed on product labels. All other ingredients – emulsifiers, solvents, carriers, aerosol propellants, fragrances, dyes and such – are considered inert. The new study exposed honeybees to two treatments: the isolated active ingredients in the fungicide Pristine, which is used to control fungal diseases in almonds and other crops, and the whole Pristine formulation...

Honeybees, which pollinate one-third of the crops Americans eat, face many threats, including infectious diseases. On Jan. 4, 2023, a Georgia biotechnology company called Dalan Animal Health announced that it had received a conditional license from the U.S. Department of Agriculture for a vaccine designed to protect honeybees against American foulbrood, a highly destructive infection. To receive a conditional license, which usually lasts for one year and is subject to further evaluation by the USDA, veterinary biological products must be shown to be pure, safe and reasonably likely to be effective. Dr. Jennie Durant, an agriculture researcher at the University of California, Davis, who specializes in honeybee health, explains why this vaccine is potentially an important step in ongoing efforts to protect pollinators. 1. What threat does this vaccine address? The new bee vaccine, Paenibacillus Larvae Bacterin, aims to protect honeybees from American foulbrood. This highly destr...

The extreme weather that has battered much of the U.S. in 2022 doesn’t just affect humans. Heat waves, wildfires, droughts and storms also threaten many wild species – including some that already face other stresses. I’ve been researching bee health for over 10 years, with a focus on honey bees. In 2021, I began hearing for the first time from beekeepers about how extreme drought and rainfall were affecting bee colony health. Drought conditions in the western U.S. in 2021 dried up bee forage – the floral nectar and pollen that bees need to produce honey and stay healthy. And extreme rain in the Northeast limited the hours that bees could fly for forage. In both cases, managed colonies – hives that humans keep for honey production or commercial pollination – were starving. Beekeepers had to feed their bees more supplements of sugar water and pollen than they usually would to keep their colonies alive. Some beekeepers who had been in busines...