Late April. Colonies are building fast, first supers going on in warmer regions, and swarm traps should already be out. This week brought one genuinely strong research finding on natural varroa resistance.
California hybrid bees carry 68% fewer varroa mites than commercial stock
A UC Riverside study published in Scientific Reports tracked 236 colonies over three years (2019-2022). Feral hybrid bees in Southern California, a genetic mix of African, Eastern European, Middle Eastern, and Western European lineages, consistently kept varroa populations well below treatment thresholds. Colonies headed by locally raised hybrid queens were more than five times less likely to need chemical intervention compared to commercial stock.
The most interesting part is what happened at the larval stage. Mites showed measurably less interest in hybrid larvae around day seven, when brood is normally most vulnerable. That suggests resistance may be baked into the genetics rather than explained by adult grooming or hygienic behavior alone.
These bees are not from any breeding program. They come from feral colonies living in trees.
We keep chasing a single fix in breeding programs, but this study shows the genetic mix behind natural resistance holds up better than anything we’ve tried to isolate. In Slovenia, we pride ourselves on our local Carniolan bees, but we should also pay more attention to the survivors in the wild and to selective breeding.
The fact that mites lose interest in larvae at day seven is a bigger deal than it might sound. It suggests resistance isn’t just about hygienic behavior, it might be tied to how larvae develop, not just how adult bees respond. Also, it makes me wonder how many local survivor colonies we ignore simply because they don’t fit the “perfect commercial profile”.
The UC Riverside varroa resistance study will likely get picked up across beekeeping media this week. Worth tracking whether the research team publishes data on which specific genetic markers are involved. That determines whether this stays an interesting finding or becomes something queen breeders can actually work with.
2026 swarm season is running 17 days early across parts of the US
A Reddit r/Beekeeping post from April 18 reported swarm activity arriving well ahead of schedule after a brief warm spell. The discussion pulled in reports from multiple regions. The pattern is: fluctuating spring weather, a warm snap, bees respond, the beekeeper’s calendar does not. If you planned your first split for May, your colonies may have already made that decision without asking.
This is a classic spring trap. Beekeepers often plan their work based on last year’s routine, but nature doesn’t follow a calendar. In my experience, everything shifts around March 15. The quick jump in day length and the first big flush of willow pollen kick the colony into gear.
If the weather is warm, the expansion happens much faster than you expect. Don’t wait for May. If you see brood on 80% of your frames during inspection, that’s your cue to super up right away.
Wild bees drove all tomato pollination in organic fields. Managed hives added nothing.
A study published April 16 in Apidologie examined organic tomato farms in Brazil where managed stingless bee hives were introduced alongside wild pollinator populations. The managed bees never visited tomato flowers. Not once. DNA analysis of pollen from their hives confirmed they foraged exclusively on non-crop plants instead.
Meanwhile, wild bees (60 species documented, including various native sweat bees and mining bees) provided all measurable pollination benefits. The key factor was habitat diversity: farmers who maintained non-crop flowering plants along field margins and between rows supported far richer wild pollinator communities.
More managed hives didn’t help. More habitat did. So as I see it, we keep throwing managed bees at the pollination problem when wild species would do the job, if we just gave them somewhere to live.
Toronto’s re-wilding movement shows what urban pollinator habitat actually looks like
A Canadian Press report profiles Toronto’s growing urban re-wilding effort. Residents are replacing invasive plants with native species along laneways, beside churches, in local parks. The focus is on plants with deep co-evolutionary ties to local pollinators: milkweed for monarchs, cup plants for overwintering habitat, native grasses for structure. The efforts are backed by municipal PollinateTO grants and the David Suzuki Foundation’s Butterflyway project.
I’m a huge fan of native plants because native plants are native for a reason.
UCSB is racing to digitize historic bee specimen collections before they degrade
UC Santa Barbara is working to digitize its entomological bee collections, converting physical specimens into high-resolution digital records for AI-driven species identification and population tracking. This is part of a broader push across natural history museums to preserve biodiversity data. For beekeepers, not immediately actionable. But if you are following how AI tools might eventually assist with field-level species identification, this is the foundation being built right now.
Earth Day 2026: US pesticide policy still contested, no resolution in sight
Beyond Pesticides published its annual Earth Day advocacy brief, listing specific action items for pesticide reform and pollinator protection. Separately, NPR reported friction within the MAHA movement over the pace of regulatory rollback on environmental protections. For anyone tracking US neonicotinoid policy: EPA re-registration decisions and enforcement priorities remain politically contested. The direction is unclear.
The EU is in a slightly better spot. The Pollinator Monitoring Scheme should become mandatory by December 2026, while US policy seems to be going the other way.
However, on paper, the EU looks much safer for bees due to the European Food Safety Authority’s scientific input. But paper doesn’t always match the field. The real decisions happen at the member state level, where lobbying often overrides science.
We see this with Neonicotinoids. They are restricted across the EU, yet countries like France or Romania constantly issue “temporary exemptions.” So you end up with strict rules in Brussels and plenty of loopholes out in the sunflower fields.
