June Varroa Monitoring: Staying Ahead Before Summer Pressure Peaks
June is the sweet spot of the beekeeping season, but it's also a pivotal decision point for varroa management. Colonies at 2% infestation in June will reach 5% by August without intervention in roughly 60% of cases, based on typical summer mite population doubling rates. That's the difference between a healthy fall treatment result and an emergency situation that threatens your winter bees.
A June count does two things: it tells you whether your spring treatment held, and it sets your baseline for the rest of the season. In VarroaVault, a June count result automatically triggers one of two pathways: a treatment recommendation if you're at or above threshold, or a next-count reminder for 30 days out if you're clean. You don't have to decide what to do next. The app reads your count and your honey super status and tells you your options.
TL;DR
- June treatment decisions should be based on a current mite count, not calendar date alone
- Temperature constraints in June may limit which treatments are effective in your climate zone
- PHI timing for June treatments affects when honey supers can be added or must be removed
- Log a mite count before starting any June treatment to calculate efficacy post-treatment
- VarroaVault's treatment reminders for June account for regional temperature and flow calendars
- Recording June treatment dates creates the audit trail needed for state inspection compliance
What "Good" Looks Like in June
A June count below 1% with no honey supers means you're in good shape for the season opener. Your mite population is low, and you have a 4-6 week buffer before summer pressure peaks. Schedule your next count for early July and plan your August treatment proactively.
A June count between 1-2% with honey supers on puts you in the watch zone. You're under threshold but climbing. This is the moment to plan your treatment product and timing so you're not making reactive decisions in August. If your June count was 1.5%, plan to treat in late July or early August regardless of where the count goes next. Better to treat slightly early than to wait and cross 3% during peak summer brood.
A June count above 2% requires action now, honey flow or not. See the section below on treatment options with supers on.
The Honey Flow Complication
June treatment is complicated by honey production. Most beekeepers run supers from May through August, and many registered varroa treatments cannot be used with honey supers on. This is the PHI (pre-harvest interval) constraint that forces many beekeepers to choose between treating and producing honey.
Your options with supers on:
Formic acid (MAQS or Formic Pro): Both are labeled for use with honey supers on. MAQS has a 0-day PHI for honey but requires removal and replacement of strips after 7 days for a second treatment. Temperature restrictions apply: 50-85F. Formic Pro is a single application with no removal required, effective over 14-20 days. Check label for current temperature guidelines.
Drone brood removal: Not a treatment but a mite-reduction tool that removes mites in capped drone cells. If you're seeing 1-2% in June, pulling a frame of capped drone brood every 24 days removes a meaningful percentage of your mite population without affecting honey production.
Planning for super removal: If your June count is 2%+, plan your super removal date and schedule Apivar or thymol treatment to begin immediately after. This is the nectar flow mite monitoring approach: monitor through the flow, then treat aggressively when supers come off.
Connecting June to Your Annual Plan
June is where your season's management arc gets set. A clean June count with a plan for August is a season under control. A June count you ignore is how beekeepers end up in October emergency mode.
Use your June count data in your pre-harvest interval tracker to calculate exactly when you can treat after honey harvest. If your June count is 1.8% and you plan to pull supers on August 15, you know Apivar needs to go in by August 16 to protect your winter bees. Planning that timeline in June, not August, is what separates proactive management from reactive crisis.
Frequently Asked Questions
What is a good mite count for June?
Below 1% is ideal. Below 2% is acceptable with a monitoring plan for July. At 2% or above, you should be planning treatment immediately because summer mite population growth will push you well above threshold by August if you don't act. The 2% threshold is the active-season standard from the Honey Bee Health Coalition, but in June, catching a problem before it compounds is more valuable than waiting until you've definitively crossed the line. A June count of 1.8% with an upward trend from May is more concerning than a June count of 2.1% that's stable or declining from a May treatment.
If my June count is high, should I treat during the flow?
If your count is above 2% and you have supers on, use formic acid. MAQS and Formic Pro are both labeled for use with honey supers on, and both offer some penetration into capped brood cells, which makes them more effective than OA dribble when brood is present. If temperatures are too high for formic acid (above 85F), your practical options are drone brood removal to slow mite growth and planning for immediate Apivar application when supers come off. Don't leave a 3%+ count unaddressed just because honey supers are on.
Does VarroaVault adjust recommendations based on my June count?
Yes. When you log a June count, VarroaVault reads your result alongside your honey super status and current temperature range to generate a recommendation. Below threshold with supers on means a next-count reminder in 30 days. At threshold with supers on means formic acid options are presented with label guidance. At threshold with supers off means the full treatment selector opens, including Apivar, thymol, and OA protocols. The recommendation also factors in your last treatment date to flag potential resistance concerns if you're treating the same product class twice in a season.
How do I know if my varroa treatment is working?
Run a mite count 2-4 weeks after the treatment ends and compare it to your pre-treatment count. The efficacy formula is: ((pre-count - post-count) / pre-count) x 100. A result above 90% indicates effective treatment. Results below 80% should trigger investigation for possible resistance, application error, or reinfestation. Log both counts in VarroaVault to track efficacy trends across treatment cycles.
How often should I check mite levels in my hives?
At minimum, once per month (every 3-4 weeks) during the active season. Increase to every 2 weeks when counts are near threshold or after a treatment to verify it worked. In fall, monitoring frequency matters most because the window to treat before winter bees are raised is narrow. VarroaVault's monitoring reminders can be set to your preferred interval for each apiary.
What records should I keep for varroa management?
Each record should include: date of count or treatment, hive identifier, monitoring method used, number of bees sampled, mites counted, infestation percentage, treatment product name and EPA registration number, dose applied, treatment start and end dates, and PHI end date. State apiarists typically expect this level of detail during inspections. VarroaVault captures all of these fields in a single log entry.
Sources
- American Beekeeping Federation (ABF)
- USDA ARS Bee Research Laboratory
- Honey Bee Health Coalition
- Penn State Extension Apiculture Program
- Project Apis m.
Get Started with VarroaVault
The information in this guide is most useful when you have your own mite count data to apply it to. VarroaVault stores every count, flags threshold crossings automatically, and builds the treatment history you need for state inspections and effective management decisions. Start your free trial at varroavault.com.