Varroa, beetles & diseases
Learn what to look for, keep records and know when to involve a biosecurity officer.
Small Hive Beetle Management
The article introduces small hive beetle and practical ways to reduce risk in the apiary. Read Small Hive Beetle Management, then explore the NSW management guide below.
Small hive beetle — management reading
Inspecting for small hive beetle means looking beyond the presence of an occasional adult. Larval damage and slimed, fermenting comb signal a much more serious problem. The updated NSW management guidance discusses an integrated approach, including colony strength, hygiene and matching comb space to the bees able to defend it.
Even strong hives can be affected. Assess other pressures, including Varroa, rather than treating beetles as the only possible cause of decline. Handle affected comb and equipment according to current guidance, and do not use spoiled honey as food for people or bees. Check applicable product labels and permits before using any control.
Varroa: a monitoring and management cycle
Varroa management starts with measured mite levels, not with waiting for a hive to look unwell. NSW DPIRD recommends monitoring monthly except in very cold winter conditions, and recommends checking during treatment now that miticide resistance is present. For a small apiary, monitoring all colonies gives a better picture than relying on one hive.
Keep the date, colony identity, sampling method and result together. Use the current NSW method instructions and decision guidance to interpret the result in the context of brood, season and colony development. Continue checking effectiveness during and after management. The current NSW management page directs beekeepers to report the first positive detection in their hives.
Choose management with current Australian product labels and permits, including their restrictions and safety directions. Do not substitute an overseas label or an old online recipe.
American foulbrood
American foulbrood is a serious brood disease. Its ability to spread through contaminated material is why unexplained brood death deserves prompt attention, even when only one colony appears affected. Moving suspect comb or sharing equipment can turn a local problem into an apiary problem.
Use the NSW disease guidance to recognise warning signs and obtain a diagnosis. Keep records of the affected colony and avoid spreading suspect material while seeking advice. Do not treat a short description or photograph as a diagnosis, and do not assume antibiotics cure AFB. Current NSW registration conditions require notification of notifiable bee pests and diseases within one working day of suspicion or awareness.
Chalkbrood
Chalkbrood is a fungal brood disease associated with the familiar chalk-like mummified larvae. These may be visible in cells, on the hive floor or near the entrance. Cold, damp conditions and other stresses can favour an outbreak, but a scattered brood pattern alone does not identify the cause.
BeeAware’s profile explains the disease and how colony management and hygiene can reduce its impact. Consider nutrition, moisture and the colony’s ability to maintain its brood, and seek experienced help where signs are unclear. Avoid transferring suspect material between hives. This introduction is identification background, not a chemical treatment recommendation.
European foulbrood
European foulbrood is a bacterial brood disease with a different cause and management pathway from American foulbrood. Similar-looking brood problems should not be treated as interchangeable. Regular examination, good nutrition and an early confirmed diagnosis are central themes in the NSW guidance.
If you find abnormal or dying larvae, record the colony and observations and seek biosecurity advice. Follow current reporting and diagnostic instructions before deciding what to do next. The official publication includes technical treatment material; this library does not reproduce antibiotic directions or imply that medication can be selected without appropriate professional advice and current legal conditions.
Nosemosis / Nosema
Nosema affects adult honey bees rather than presenting as a distinctive brood disease. Reduced colony performance can have several causes, so a weak hive or marks near an entrance are not enough to diagnose it. A useful investigation begins with observations, colony history and appropriate testing.
The BeeAware profile provides background on the organisms, their spread and the part colony stress and management can play. Use it to understand the questions to raise with an adviser, not to select a home remedy.
Pests and diseases: learn a routine
A useful inspection routine builds familiarity with healthy brood and adult bees, so an unusual change stands out. Record observations consistently: which colony, when it was checked, what looked different and what follow-up is needed. Records help distinguish a new problem from one that has persisted.
The NSW pest and disease hub is a starting point for identification and the right reporting pathway. Avoid spreading suspect honey, comb, bees or equipment while seeking advice. Several causes can occur together, so treat identification guides as learning aids. State guidance and the national biosecurity manual provide further reading.
Varroa life cycle: why timing matters
Understanding the relationship between Varroa and bee brood helps explain why one low count is not a permanent all-clear. Monitoring and management need to be repeated as the colony develops and conditions change. Learn the biology alongside the practical sampling method rather than choosing a treatment from a video alone.
For Australian practice, use NSW monitoring and integrated-management guidance. Overseas videos may describe products or methods that do not apply here.
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