Do due diligence laws actually promote climate smart food?

Read the full story at Food Navigator.

EU-proposed due-diligence legislation has been criticised for triggering unintended consequences across the supply chain, which begs the question: will such a law actually promote climate smart food?

Bees face many challenges – and climate change is ratcheting up the pressure

Bees look for water on an outdoor tap in Berlin, Germany during a hot spell, June 19, 2022. Wolfram Steinberg/picture alliance via Getty Images

by Jennie L. Durant, University of California, Davis

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 business for decades shared that they lost 50% to 70% of their colonies over the winter of 2021-2022.

These weather conditions likely also affected wild and native bees. And unlike managed colonies, these important species did not receive supplements to buffer them through harsh conditions.

Each year, the U.S. Department of Agriculture and the Environmental Protection Agency host federal pollinator experts to share the latest scientific findings on bee and pollinator health, and assess the status of these important insects, birds, bats and other species. One clear takeaway from this year’s meeting was that climate change has become a new and formidable stressor for bees, potentially amplifying previously known issues in ways that scientists can’t yet predict but need to prepare for.

Climate change threatens bees around the world. In Australia, large-scale bushfires and drought have killed millions of bees in recent years.

The scourge of Varroa mites

Pollinators contribute an estimated US$235 billion to $577 billion yearly to global agriculture, based on the value of the crops they pollinate. Understanding and mitigating the impacts of climate change on pollinators is key for supporting healthy ecosystems and sustainable agriculture.

Bee health first attracted widespread attention in 2006 with the emergence of Colony Collapse Disorder, a phenomenon where the majority of adult worker bees in a colony disappeared, leaving their honey and pollen stores and some nurse bees behind to care for the queen and remaining immature bees. In the past five years, reported cases have declined substantially. Now, researchers are focusing on what beekeepers call the “four Ps”: parasites, pathogens, pesticides and poor nutrition, as well as habitat loss for wild and native bees.

A bee flying, with two brown circular mites clinging to it
A honey bee carrying two Varroa mites, one above its leg and one on its back. USGS

One of the most severe threats to honey bees over the past several decades has been Varroa destructor, a crablike parasitic mite that feeds on honey bees’ fat body tissue. The fat body is a nutrient-dense organ that functions much like the liver in mammals. It helps bees maintain a strong immune system, metabolize pesticides and survive through the winter.

These are vital functions, so controlling mite infestations is essential for bee health. Varroa can also transmit deadly pathogens to honey bees, such as deformed wing virus.

Controlling mite populations is challenging. It requires using an insecticide in an insect colony, or as beekeepers say, “trying to kill a bug on a bug.” It’s hard to find a formula strong enough to kill mites without harming the bees.

Monitoring Varroa takes significant skill and labor, and mites can build up resistance to treatments over time. Researchers and beekeepers are working hard to breed Varroa-resistant bees, but mites continue to plague the industry.

Pesticide microdoses

Pesticides also harm bees, particularly products that cause sublethal or chronic bee health issues. Sublethal pesticide exposures can make bees less able to gather forage, grow healthy larvae and fight off viruses and mites.

However, it can be hard to document and understand sublethal toxicity. Many factors affect how bees react to agrochemicals, including whether they are exposed as larvae or as adult bees, the mixture of chemicals bees are exposed to, the weather at the time of application and how healthy a bee colony is pre-exposure.

Researchers are also working to understand how soil pesticides affect ground-nesting wild bees, which represent over 70% of the U.S. native bee population.

A bee crawls out of a small hole in the dirt, overhung by grass
A ground-nesting bee (Colletes inaqualis) emerging from its burrow. Rob Cruickshank/Flickr, CC BY

Junk food diets

Like many other species, bees are losing the habitat and food sources that they depend on. This is happening for many reasons.

For example, uncultivated lands are being converted to farmland or developed worldwide. Large-scale agriculture focuses on mass production of a few commodity crops, which reduces the amount of nesting habitat and forage available for bees.

And many farmers often remove pollinator-friendly plants and shrubs that grow around farm lands to reduce the risk of attracting animals such as deer and rodents, which could spread pathogens that cause foodborne illness. Research suggests that these efforts harm beneficial insects and don’t increase food safety.

As diverse and healthy bee forage disappears, beekeepers feed their bees more supplements, such as sugar water and pollen substitutes, which are not as nutritious as the nectar and pollen bees get from flowers.

Climate change is a force multiplier

Researchers don’t know exactly how climate change will affect bee health. But they suspect it will add to existing stresses.

For example, if pest pressures mount for farmers, bees will be exposed to more pesticides. Extreme rainfall can disrupt bees’ foraging patterns. Wildfires and floods may destroy bee habitat and food sources. Drought may also reduce available forage and discourage land managers from planting new areas for bees as water becomes less readily available.

Climate change could also increase the spread of Varroa and other pathogens. Warmer fall and winter temperatures extend the period when bees forage. Varroa travel on foraging bees, so longer foraging provides a larger time window for mites and the viruses they carry to spread among colonies. Higher mite populations on bee colonies heading into winter will likely cripple colony health and increase winter losses.

Studies have already shown that climate change is disrupting seasonal connections between bees and flowers. As spring arrives earlier in the year, flowers bloom earlier or in different regions, but bees may not be present to feed on them. Even if flowers bloom at their usual times and locations, they may produce less-nutritious pollen and nectar under extreme weather conditions.

Research that analyzes the nutritional profiles of bee forage plants and how they change under different climate scenarios will help land managers plant climate-resilient plants for different regions.

Creating safe bee spaces

There are many ways to support bees and pollinators. Planting pollinator gardens with regional plants that bloom throughout the year can provide much-needed forage.

Ground-nesting native bees need patches of exposed and undisturbed soil, free of mulch or other ground covers. Gardeners can clear some ground in a sunny, well-drained area to create dedicated spaces for bees to dig nests.

Another important step is using integrated pest management, a land management approach that minimizes the use of chemical pesticides. And anyone who wants to help monitor native bees can join community science projects and use phone apps to submit data.

Most importantly, educating people and communities about bees and their importance to our food system can help create a more pollinator-friendly world.

Jennie L. Durant, Research Affiliate in Human Ecology, University of California, Davis

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Webinar: An Integrated Approach to Simplifying the Energy Transition

Nov 3, 2022, noon CT
Register here.

Nearly 60 percent of Fortune 500 companies are committed to reducing their carbon footprint, yet the world currently faces pressures unprecedented in recent history – supply chain disruptions, energy price volatility, economic uncertainty and more. Organizations must navigate this environment while continuing to decarbonize, and many view these two goals as competing priorities. 

In fact, these two strategies can go hand in hand. In this webcast, learn how an integrated energy strategy can help organizations achieve their economic and environmental goals. We’ll discuss:   

  • How organizations can think across functions and energy solutions to create a holistic energy strategy that encompasses sustainability, decarbonization, flexibility, resilience, electrification and energy management 
  • Why today’s environment is creating new energy opportunities for organizations 
  • How one organization is executing its sustainability strategy for the future


  • Heather Clancy, Vice President, Editorial Director, GreenBiz Group


  • Micheal Grossner,  Senior Director of Sustainability, Wabtec Corporation.
  • Brian Quinlan, Partner Account Executive, Enel North America

Low- and zero-carbon fuels critical to meeting aviation decarbonization needs

Read the full story at GreenBiz.

The U.S. would have to more than double its biofuel production to meet domestic aviation energy demand, despite being the global leader in biofuel production.

A wetter world is changing farm country. Can growers adapt?

Read the full story at The Gazette.

A hotter atmosphere is causing rain to fall in harder bursts, pushing back planting seasons and drowning crops. At the same time as human-driven climate change is juicing precipitation, Corn Belt farming practices such as installing underground drainage tiles and leaving fields bare after harvest are changing how water moves across the landscape and into waterways.

Scaling up climate-smart agriculture practices

Read the full story at Farm Progress.

Scaling up climate-smart agriculture practices across complex landscapes and diverse ecosystems can be challenging. The traditional approach used by many scientists in agriculture and natural systems is narrowly focused on a set of one-dimensional questions sometimes fundamentally deficient in addressing the complexity of landscapes, interactions between human-driven effects and landscapes, and the practical experiences of people working the land.

The disconnect between some agriculture research and farmers’ practical experience may stem from the assumption that research findings on a small scale can be applicable on a large scale across landscapes. Or that research findings can be generalized across the landscape by applying conservation practices to solve the agroecosystems’ challenges.

Do eco-labels on menus influence sustainable food choices?

Read the full story at Food Navigator.

Researchers want to know whether placing a traffic light rating of eco-friendliness next to dishes on a menu increases the likelihood of diners choosing more sustainable options.

These climate tech entrepreneurs are teaming up to scale equity-based solutions

Read the full story at GreenBiz.

The Upside Tech Alliance is minimizing the individual sales calls its founding climate tech startups need to make to busy mayors and city planners.

If a company pledges to source from a ‘regenerative’ farm, what does that really mean?

Read the full story at Ag Daily.

I received an email from a marketer touting the latest announcement from a well-known baking-goods company. She informed me that the company was committed to sustainability and mitigating their carbon footprint. To become more sustainable, the company pledged to source all of its wheat from farmers using regenerative production methods. Now to be fair, this was only one of several promises, but obviously it was the one that caught my attention.

So I did something absolutely crazy. I asked her how they define regenerative agriculture.

I anticipated her response. She said the company has a “fluid definition” without set standards and practices. But generally it meant more carbon in the soil and better soil health.

I agreed with her that farms shouldn’t have a one-size-fits-all approach — and I really meant it. What works for a farm in southern California won’t work for one near the beaches of Lake Michigan. The best production practices involve a calculation on a farm-to-farm basis that keeps in mind weather, soil type, seasons, and the crop involved. And most farmers are focusing more and more on healthy soils and the things they can do to promote them.

She gave me the right answer. But doesn’t that make the company’s pledge a bit wishy-washy?

New UC study helps growers estimate cover crop costs and potential benefits

Read the full story at Morning Ag Clips.

Cover crops offer many potential benefits – including improving soil health – but not knowing the costs can be a barrier for growers who want to try this practice. To help growers calculate costs per acre, a new study on the costs and potential benefits of adding a winter cover crop in an annual rotation has been released by UC Agriculture and Natural Resources, UC Cooperative Extension and the UC Davis Department of Agricultural and Resource Economics.