Hey farm gals, it’s Kara from Lange Girl Farms!
The big horses were out grazing this morning with their steady, grounded energy, while the alpacas moved along the fenceline checking everything out in their thoughtful way. I took time to hand-weed a few stubborn spots near the herbs and torch some young weeds before they could spread. The Siberian huskies had their own space to run, the llamas kept their quiet lookout, and the chickens and ducks were happily occupied in their secure run. These simple mornings without chemicals feel right — the land stays alive, the animals stay strong, and we have real peace of mind.
In Part 1 we looked at the wake-up call on flupyradifurone’s detection in conventional strawberries (including Driscoll’s) and its use on many other crops. Now in Part 2 we’re going full nerd on what flupyradifurone actually is, how it works as a systemic insecticide, why it’s so commonly applied to strawberries and other high-value fruits, and how it fits into the broader picture of the chemicals we’ve covered. This is the foundation so you understand exactly why we refuse it entirely on our regenerative homestead.
What Is Flupyradifurone?
Flupyradifurone is a butenolide insecticide developed by Bayer. It is marketed under brand names like Sivanto and is used for control of sucking and chewing pests. It is applied as a foliar spray, soil drench, or seed treatment on a wide range of crops, including strawberries, other berries, tree fruits, vegetables, and field crops.
It is valued for its systemic activity — once absorbed, it moves throughout the plant, protecting new growth and providing long-lasting control. In conventional strawberry production, it helps manage aphids, whiteflies, and other pests that damage berries and reduce yields.
How It Works: Targeting the Insect Nervous System
Flupyradifurone acts as a nicotinic acetylcholine receptor (nAChR) agonist, similar to neonicotinoids but from a different chemical class (butenolides). Here’s the step-by-step mechanism:
1. Absorption and systemic movement: The insecticide is taken up by the plant roots or leaves and translocated via the xylem and phloem to all parts of the plant, including pollen, nectar, and new growth.
2. Binding to receptors: In insects, it binds to nicotinic acetylcholine receptors in the central nervous system.
3. Overstimulation: The binding causes continuous nerve firing, leading to overstimulation, paralysis, tremors, and eventual death of the insect.
4. Selectivity claim: Manufacturers say it has a better safety profile for bees and mammals than some older insecticides, but independent studies show it can still harm pollinators and beneficial insects at field-realistic doses, especially with chronic exposure.
Because it is systemic, even small amounts applied to the seed or soil can protect the plant for weeks to months — but this also means constant low-level exposure for any insect (or bird) that interacts with the crop.
How Flupyradifurone Compares to the Other Chemicals We’ve Covered
• Glyphosate: Systemic herbicide targeting plant amino acid synthesis.
• Paraquat: Contact herbicide causing explosive ROS production.
• Atrazine: Photosynthesis inhibitor, persistent in water.
• 2,4-D / Dicamba: Synthetic auxins causing uncontrolled plant growth.
• Neonicotinoids: Systemic nicotinic receptor agonists, highly toxic to pollinators.
• Organophosphates: Nerve agents inhibiting acetylcholinesterase.
• Fludioxonil / Fluxapyroxad: Fungicides targeting fungal pathways.
• Flupyradifurone: Systemic butenolide insecticide targeting insect nervous systems, used as a “bee-friendly” alternative to some neonics, but still systemic and persistent in plant tissues.
The big similarity with neonics is the systemic nature and prophylactic use, which leads to residues in pollen, nectar, and food.
Why “Convenient” Systemic Insecticides Don’t Fit Regenerative Homesteads
Big ag relies on flupyradifurone to protect strawberries and other berries from pests during long-distance shipping and storage. On our homestead we refuse it entirely. We grow our own berries when possible, source from trusted local regenerative farms, or preserve what we harvest. We hand-weed, torch weeds, plant cover crops, and support beneficial insects because those methods build true balance instead of relying on systemic insecticides that can leave residues and harm pollinators.
Our alpacas and big horses graze clean pasture we’ve built without these chemicals. Our huskies, llamas, chickens, and ducks live without the added burden. The pattern is the same across every series: a chemical is introduced for convenience, problems emerge, and regenerative farms are left protecting their clean systems.
Series Roadmap – What’s Coming Next
Part 3: The devastating toll on humans (cancer and developmental links), livestock, wildlife, and waterways.
Part 4: On our plates – residues in strawberries, berries, and other foods, plus the cumulative load.
Part 5: Follow the money – manufacturers, the Driscoll’s licensing model, and regulatory status.
Part 6: The roots – discovery and development as an insecticide.
Part 7: Reclaiming our land – our exact holistic methods (hand-weeding, torch burning, mulch, cover crops, livestock grazing with our alpacas and big horses), Michigan-specific tips, and how we grow or source clean berries without these insecticides.
Pin this post and the series. Drop a comment: Have you stopped buying conventional strawberries or berries after seeing reports like this? Are you growing your own or sourcing from trusted farms? I read every comment.
If you want to support a farm refusing these chemicals entirely, swing by the shop for our wildcrafted salves (great after hand-weeding or torch work), herbal teas grown right here without sprays, or non-GMO seeds for your own regenerative garden. Every purchase helps us keep protecting our land and animals.
We can protect our kids, our animals, and our future—one holistic choice at a time.
See you in Part 3, farm gals!
With love from the pasture,
Kara
Lange Girl Farms
