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1 June 2000 A Sequential Sampling Scheme for Detecting Infestation Levels of Tracheal Mites (Heterostigmata: Tarsonemidae) in Honey Bee (Hymenoptera: Apidae) Colonies
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Abstract

The introduction of parasitic honey bee mites, the tracheal mite, Acarapis woodi (Rennie) in 1984 and the Varroa mite, Varroa jacobsoni, in 1987, has dramatically increased the winter mortality of honey bee, Apis mellifera L., colonies in many areas of the United States. Some beekeepers have minimized their losses by routinely treating their colonies with menthol, currently the only Environmental Protection Agency-approved and available chemical for tracheal mite control. Menthol is also expensive and can interfere with honey harvesting. Because of inadequate sampling techniques and a lack of information concerning treatment, this routine treatment strategy has increased the possibility that tracheal mites will develop resistance to menthol. It is important to establish economic thresholds and treat colonies with menthol only when treatment is warranted rather than treating all colonies regardless of infestation level. The use of sequential sampling may reduce the amount of time and effort expended in examining individual colonies and determining if treatment is necessary. Sequential sampling also allows statistically based estimates of the percentage of bees in standard Langstroth hives infested with mites while controlling for the possibility of incorrectly assessing the amount of infestation. On the average, sequential sampling plans require fewer observations (bees) to reach a decision for specified probabilities of type I and type II errors than are required for fixed sampling plans, especially when the proportion of infested bees is either very low or very high. We developed a sequential sampling decision plan to allow the user to choose specific economic injury levels and the probability of making type I and type II errors which can result inconsiderable savings in time, labor and expense.

Maryann T. Frazier, Jennifer Finley, William Harkness, and Edwin G. Rajotte "A Sequential Sampling Scheme for Detecting Infestation Levels of Tracheal Mites (Heterostigmata: Tarsonemidae) in Honey Bee (Hymenoptera: Apidae) Colonies," Journal of Economic Entomology 93(3), 551-558, (1 June 2000). https://doi.org/10.1603/0022-0493-93.3.551
Received: 20 April 1998; Accepted: 1 December 1999; Published: 1 June 2000
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