What is a key method for diagnosing Varroa mites?

The sticky bottom board test is a key method for diagnosing Varroa mites because it allows beekeepers to monitor the presence and population level of these parasites within a hive. In this method, a sticky board is placed at the bottom of the hive, and as bees move in and out, they may drop Varroa mites onto the board. By examining the number of mites stuck to the board over a specific time period, beekeepers can assess the level of infestation. This quantitative approach is crucial for determining whether management interventions are necessary.

Other methods, such as checking honey supers or inspecting for wax moths, are not specifically effective for diagnosing Varroa mite infestations. Honey supers are generally focused on honey production and not the health of the bee population, while wax moths are a separate issue that affects hive structure and does not provide insight into mite levels. Observing bee mating behavior does not relate to the monitoring of pest levels and is therefore not useful in diagnosing Varroa mite infestations.