Why Ivy Bees Swarm in Fall—and How to Shield Your Hives

Dr. Anya Sharma · 2026-10-01

You've probably noticed it: just as the leaves start turning, the ivy buzzes with life. Those late-season foragers—often ivy bees—suddenly get very busy. But if you're a beekeeper, that burst of activity can spell trouble for your colonies. Ivy bees (Colletes hederae) emerge in early fall, timed perfectly with the blooming of ivy. They're solitary ground-nesters, not honeybees, but they compete for the same floral resources. And they can attract pests that threaten your hives. So what's a beekeeper to do? Let's talk about the best pest control products and strategies to keep your bees safe and healthy through autumn. ### Know Your Enemy: Ivy Bees and the Pests They Bring Ivy bees themselves aren't aggressive, but their presence can lure in predators and parasites. Think of them as the cool kids at a party—where they go, trouble follows. Common fall pests include: - **Varroa mites**: These tiny vampires weaken bees and spread viruses. Fall is prime time for infestation. - **Small hive beetles**: They love the moisture and warmth of a hive, especially as temperatures drop. - **Wax moths**: They lay eggs in weak hives, and their larvae tunnel through comb. - **Ants**: They raid hives for honey, and ivy bees can attract them. ### Top Pest Control Products for Fall Beekeeping You don't need a chemistry lab to protect your hives. Here are some proven, beekeeper-friendly options. #### 1. Varroa Mite Treatments - **Apivar strips**: Slow-release amitraz strips that kill mites over 42 days. Cost: about $8–$10 per strip. Use two strips per hive. - **Formic acid pads** (e.g., Mite-Away Quick Strips): These work in cooler weather (50–85°F) and penetrate capped brood. Price: around $20 for a 10-pack. - **Oxalic acid vaporizer**: A more hands-on method. You'll need a vaporizer ($150–$200) and oxalic acid crystals ($15 per pound). Vaporize when bees are broodless in late fall. > "I've tried everything, but Apivar strips plus a late-season oxalic acid treatment knocked my mite counts down to almost zero," says Tom, a beekeeper from Ohio. "It's a one-two punch that works." #### 2. Small Hive Beetle Traps - **Beetle blaster traps**: These fit between frames and use oil to drown beetles. $5–$8 each. - **Diatomaceous earth**: Sprinkle around the hive base. It's natural and cheap ($10 for 2 lbs). #### 3. Wax Moth Control - **Bt (Bacillus thuringiensis)**: A biological larvicide. Mix with water and spray on combs. $15–$20 per bottle. - **Freeze frames**: If you have a chest freezer, freeze combs for 24–48 hours to kill eggs and larvae. Free. #### 4. Ant Deterrents - **Cinnamon**: Sprinkle around the hive. Ants hate it. $3 per jar. - **Vaseline barriers**: Coat hive legs or stands. Cheap and effective. ### Integrated Pest Management (IPM) for the Fall Products alone won't cut it. You need a plan. Here's a simple IPM routine: 1. **Monitor**: Check mite counts with an alcohol wash or sticky board every 2 weeks. 2. **Sanitize**: Remove debris and burr comb. Keep the hive dry. 3. **Treat**: Use the right product at the right time. Don't treat during honey flow. 4. **Requeen**: A young, vigorous queen boosts colony health. 5. **Combine**: If a hive is weak, merge it with a stronger one. ### Don't Panic—Prepare Ivy bees are a sign of autumn, not a death sentence. With the right pest control products and a bit of foresight, your hives can thrive through the season. Remember, healthy bees are better at fighting pests on their own. So keep them strong, and the pests won't stand a chance. Got a fall beekeeping tip? Share it in the comments—we're all learning together.