Unterscheidung Zwischen Bienen Verschiedenen Alters Durch Varroa Jacobsoni Oud. Und Bevorzugung Von Ammenbienen Im Sommerbienenvolk

Kraus, Bernhard; Kœniger, N.; Fuchs, Stefan

doi:10.1051/apido:19860307

Cited by 39 publications

(27 citation statements)

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“…However, assuming juvenile hormone affects invasion and reproduction, the relative short residence on bees can only be explained when mites quickly reach bees with high enough titres. Varroa mites indeed change quickly from one-day-old bees to older bees (Kraus et aL, 1986;Le Conte & Arnold, 1987), which usually have a higher juvenile hormone titre (Fluri etal., 1982;Robinson et al, 1987).…”

Section: Time Elapsed Since Emergence From Brood Cells (Days)mentioning

confidence: 99%

Does time spent on adult bees affect reproductive success of Varroa mites?

Boot¹,

Calis²,

Beetsma³

1995

Entomologia Exp Applicata

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Reproduction of Varroajacobsoni Oudemans (Acari: Varroidae) and the number of Varroa mites that were found dead on the bottom board of the hive, were studied in relation to the period the mites spent on adult honey bees, Apis mellifera L. (Hymenoptera: Apidae), prior to invasion into brood cells. The maximum period on adult bees was 23 days. To introduce mites, combs with emerging worker brood, heavily infested with mites, were placed into a colony and removed the next day. At the beginning of the first day following emergence from brood cells, 18% of the mites introduced into the colony was found on the bottom of the hive. Part of these mites may already have died inside the capped brood cells, and then fallen down after cleaning of cells by the bees. At the second and third day following emergence, respectively 4% and 2% of the mites on adult bees at the previous day was recovered on the bottom, whereas from the fourth day on only 0.6% of the mites on adult bees was recovered on the bottom per day. After invasion into brood cells, 8-12% of the mites did not produce any offspring. Of the mites that did reproduce, the total number of offspring was 4.0--4.4 per mite during one reproductive cycle, part of which may reach maturity resulting in 1.2-1.3 viable daughters, and 8-10% of the mites produced only male offspring. Reproduction was independent of the period the mites had spent on adult bees prior to invasion into brood cells.

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Section: Time Elapsed Since Emergence From Brood Cells (Days)mentioning

confidence: 99%

Does time spent on adult bees affect reproductive success of Varroa mites?

Boot¹,

Calis²,

Beetsma³

1995

Entomologia Exp Applicata

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“…Within the brood cell, parasites move from their feeding site on the pupa (abdominal ventral hole) and living site on the cell wall where faecal material accumulates (DonzeÂ , 1995;DonzeÂ & GueÂ rin, 1997;DonzeÂ et al, 1998a, b). When the bee emerges from the brood cell, the foundress and her mature female offspring leave the cell attached to the emerging bee, then transfer to a nurse bee before infesting another brood cell (Kraus et al, 1986;Le Conte & Arnold, 1987).…”

Section: Introductionmentioning

confidence: 99%

Potential mechanism for detection by Apis mellifera of the parasitic mite Varroa destructor inside sealed brood cells

Martin

Provost²,

Bagnères³

et al. 2002

Physiological Entomology

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Abstract. The parasitic mite Varroa destructor Anderson & Trueman is a major pest of the honeybee Apis mellifera L. throughout the world. Chemical agents currently used for mite control leave contaminating residues and promote pesticide resistance. As an alternative means of control, it would be useful to identify natural substances enabling bees to detect Varroa inside brood cells. These substances could then be used to trigger mite hygienic behaviour by bees.In this study several techniques were used to screen substances that might allow detection of infested brood cells by bees. Gas chromatography-mass spectrometry analysis was performed on substances extracted in dichloromethane from the contents of brood cells. Solid phase microextraction and solid injection were performed on substances obtained from living and dead Varroa, respectively. Electroantennography was performed to assess the sensitivity of olfactory receptors in bee antennae to some of these substances.Principal component analysis based on proportions of cuticular substances allowed discrimination between bees and other cell contents. Foundress Varroa exhibited the greatest dissimilarity to healthy pupae that were used as controls. Immature Varroa and faecal material were intermediate. High molecular weight compounds, mainly dimethylalkanes, were proportionally the most characteristic components of foundress Varroa. This finding suggests that these compounds would be the most apt to induce uncapping of cells infested by Varroa. Solidphase microextraction and solid injection demonstrated the presence of aliphatic acids, esters, and one alcohol, eicosenol, in Varroa. Electroantennographic recordings showed that mite-resistant bees were more responsive to some acids and one ester. We speculate that these compounds may be involved in recognition of living Varroa by honeybees.

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“…Methyl salicylate and menthol proved to be toxic to the tracheal mite. In North America, where A. woodi has become an important bee parasite, menthol is widely used in control efforts (see [ 16] Kraus [53,54] [13].…”

Section: Introductionmentioning

confidence: 99%