Varroa Treatment for New Beekeepers: What You Need to Do in Year One

First-year beekeepers who follow a structured varroa calendar lose 60% fewer colonies in year two than those who don't. Year two matters because varroa builds in year two, and beekeepers who survived year one without a management program rarely survive the compounding pressure of year two.

Here's the complete year-one calendar in plain language.

TL;DR

Treatment decisions should always be triggered by a mite count result, not a fixed calendar date
Different treatments have different temperature requirements, PHI restrictions, and brood penetration capabilities
Always run a post-treatment count 2-4 weeks after treatment ends to calculate efficacy
Efficacy below 80% warrants investigation -- possible resistance, application error, or reinfestation
Rotate treatment chemistry to prevent resistance buildup across successive cycles
VarroaVault logs treatment events, calculates efficacy, and flags when rotation is recommended

Why Year One Is Critical

You might not lose your colony in the first year. Packages start with relatively low mite loads, and the first season's mite population growth may not be severe enough to collapse the colony before December. But if you don't establish a management program in year one, year two is when it catches up with you.

This creates a dangerous false confidence in beekeepers who make it through year one with no treatment. "My bees didn't need it," they think. Then the colony that started at 0.5% in April 2025 is at 4% in August 2026 because no treatment was applied in year one, and the mite population has been compounding.

Follow the year-one calendar. It's not complicated. It protects your investment and builds the habits you need as a beekeeper.

The Year-One Varroa Calendar

April: First Mite Count

About 4-6 weeks after installing your package or nuc (when the colony has brood established), do your first alcohol wash.

What you need: A jar with a mesh lid, 70% isopropyl alcohol, a white tray.

What to do: Pull a frame from the center of the brood nest, check for the queen (set the frame aside if she's on it), shake bees into your jar, add alcohol, shake for 60 seconds, pour through the mesh into the white tray, count the mites.

What a normal April result looks like: 0-2% for a package, potentially higher for an established nuc. Anything above 2% in April warrants a proactive treatment.

Log the count in VarroaVault.

May: Second Count

One month after April's count. Log in VarroaVault.

What to expect: Your count may have risen slightly as the brood population grows. 0.5-1.5% is typical for a healthy first-year colony in May.

If it's above 2%: Treat now. Don't wait for August.

July: Third Count

By July, your colony has been building for 3-4 months. Mite populations have had time to grow. This count is a reality check before the critical fall window.

If it's above 2% in July: Treat now. Don't wait for August. A July count above 2% means you'll be above 3%+ by August if you delay.

If it's 1-2% in July: Plan to treat in August regardless of whether you cross 2% in the meantime. August is the right time.

August: The Critical Treatment

August is when you treat for winter. This is the single most important action in your first year.

Why August? The winter bees (the long-lived cohort that keeps the colony alive November through March) are being raised right now, in August. If mites are high during August, those winter bees are being raised in mite-infested cells. They'll be damaged and short-lived before they even emerge.

Do an August count before treating. Log the pre-treatment baseline.

Choose your treatment:

If supers are off (likely by August for first-year colonies): Any registered product is available. OA vaporization extended protocol (3-5 applications, 5-7 days apart) is a great first-year choice. Apivar (amitraz strips, 42-56 days) is also excellent.
If supers are still on: OA vaporization or MAQS per label.

Log the treatment in VarroaVault. Your application date, product, and dose are all logged. VarroaVault automatically schedules your post-treatment count reminder.

October: Post-Treatment Verification

14 days after OA/formic treatment (or 42 days after Apivar application), do your post-treatment count.

What success looks like: 90%+ efficacy. If you started at 3% and you're now at 0.3% or lower, your treatment worked.

If efficacy is below 90%: Check your application: was the temperature appropriate? Were strips placed correctly? If application was correct, consider a follow-up OA vaporization sequence.

Your October count target: Below 1% going into winter.

November-January: Winter OA Dribble

After you've confirmed no capped brood is present in the hive (open on a warm day above 45°F and check), apply OA dribble.

What you need: Api-Bioxal (oxalic acid, registered product), a large syringe, nitrile gloves.

What to do: Apply 5ml of 3.5% OA solution per occupied seam (each gap between frames where bees are clustered). Typical dose: 30-50ml per colony.

This single treatment, applied during the confirmed broodless period, reaches 95-97% of your mites. It's the cleanest, most effective single-application treatment available.

Log it in VarroaVault. Your year-one management record is now complete.

Setting Up VarroaVault for Year One

VarroaVault's first-year calendar pre-loads automatically for accounts created before May that have no prior count history. When you create your account and add your first hive, VarroaVault generates the April-October count schedule and August treatment recommendation as your starting calendar.

Each count reminder fires as an SMS and email at the appropriate date. When you log your counts, the calendar updates based on your actual data.

Frequently Asked Questions

What do I need to do for varroa in my first year?

Count mites in April, May, and July. Treat in August regardless of your July count if you're approaching 2%. Verify treatment efficacy with an October count. Apply OA dribble during the winter broodless period (November-January when no capped brood is present). This six-step calendar prevents most first-year colony losses from varroa.

What is the most important varroa treatment for a first-year beekeeper?

The August treatment is the most important. Winter bees are raised during August-September, and protecting that cohort from mite damage is what determines whether your colony survives winter. If you only do one treatment in your first year, make it August.

Does VarroaVault guide me through my first year?

Yes. VarroaVault's first-year calendar pre-loads automatically for new accounts. It generates count reminders at the appropriate intervals, prompts the August treatment decision, sends post-treatment count reminders, and schedules the winter OA dribble timing based on your location's first frost data.

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.