A short test evaluating larval attractiveness of honey bees to<i>Varroa jacobsoni</i>

Guzman, Lilia I. de; Rinderer, Thomas E.; Lancaster, Vicki

doi:10.1080/00218839.1995.11100892

Cited by 9 publications

(9 citation statements)

References 9 publications

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“…Reduced rates of worker brood invasion were observed in AHB compared with EHB colonies in Mexico (Guzmán-Novoa et al 1996. Variation in attractiveness of EHB brood to Varroa females was also found under temperate climatic conditions (Bü chler 1990;De Guzman et al 1995;Guzmán-Novoa et al 1996).…”

Section: Introductionmentioning

confidence: 84%

“…A lower attractivity of bee brood to reproductive female mites (Guzmán-Novoa et al 1999) was considered a key feature keeping the level of Varroa infestation in AHB colonies under the hazard threshold (De Guzman et al 1995). The first step in the reproductive cycle of a female mite is to approach a suitable host, a still uncapped brood cell containing a 5 th instar larva shortly before capping (Beetsma et al 1999).…”

Section: Introductionmentioning

confidence: 99%

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Cuticular volatiles, attractivity of worker larvae and invasion of brood cells by Varroa mites. A comparison of Africanized and European honey bees

2002

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Africanized honey bees (AHBs) of Brazil and Mexico have proven to be tolerant to Varroa destructor mites. In contrast, European honey bees (EHBs: Apis mellifera carnica) at the same tropical study site are highly intolerant to these ectoparasites. A lower attractiveness of Varroa-tolerant AHB larvae has been hypothesised to be an important trait in reducing the susceptibitlity of AHBs to these mites. Thus, selection for EHB brood that is less attractive to mites is thought to be one possibility for limiting mite population growth and thus increase the tolerance of EHBs to the mite.In Ribeirão Preto, Brazil, European A. m. carnica bees and AHBs were tested with respect to their rate of brood infestation and brood attractiveness to Varroa mites. For the comparison of brood infestation rates, we introduced combs with pieces of EHB and AHB brood into honey bee colonies (18 repetitions). The relative infestation rate of EHB brood was significantly higher compared to AHB brood.The preference behaviour of single Varroa mites was tested in a laboratory bioassay where either living host stages were offered or host extracts were presented on dummies. By these tests we could confirm the preference of Varroa females for certain developmental host stages and for their corresponding extracts. In contrast to the within-colony results, Varroa mites in the laboratory bioassay showed a slight preference for AHB compared to EHB larvae.The gas chromatographic analysis revealed differences in the chemical spectrum of extracts obtained from different larvae. In accord with the results of the bioassays, we could detect stage-specific odour differences in larval cuticular compounds, including methyl esters and hydrocarbons that have been described as kairomones. None of these substances, however, revealed significant race-specific differences. Therefore, the quantity and composition of certain cuticular compounds seem to be responsible only for the recognition of a suitable host stage by Varroa females. The different infestation rates in the colonies, however, seem to be caused neither by race-specific differences in attractiveness of bee larvae nor by an extended attractive period of EHB larvae: both AHB and EHB larvae become attractive approximately 21 h before capping of the brood cell, and thus have the same window of time when they can be parasitised.Therefore differential Varroa-infestation rates are not related to larval attraction but probably are determined by other race-specific and colony-related factors.

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Cuticular volatiles, attractivity of worker larvae and invasion of brood cells by Varroa mites. A comparison of Africanized and European honey bees

2002

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“…Therefore, our Þndings are relevant to studies of mite resistance in bees that focus on quantifying differential larval attractiveness (Guzman et al 1995). Small differences among genotypes with respect to larval size might produce spurious results in comparisons of mite levels among larvae of different genotypes if larvae are evaluated using a common source of comb.…”

Section: Discussionmentioning

confidence: 99%

Effects of Western Honey Bee (Hymenoptera: Apidae) Colony, Cell Type, and Larval Sex on Host Acquisition by Female <I>Varroa destructor</I> (Acari: Varroidae)

Calderone

Kuenen

2001

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Female mites of the genus Varroa reproduce on the immature stages of Apis cerana F. and A. mellifera L. Mites are found more often in drone brood than worker brood, and while evolutionary explanations for this bias are well supported, the proximate mechanisms are not known. In one experiment, we verified that the proportion of hosts with one or more mites (MPV, mite prevalence value) was significantly greater for drones (0.763 +/- 0.043) (lsmean +/- SE) than for workers (0.253 +/- 0.043) in populations of mites and bees in the United States. Similar results were found for the average number of mites per host. In a second experiment, using a cross-fostering technique in which worker and drone larvae were reared in both worker and drone cells, we found that cell type, larval sex, colony and all interactions affected the level of mites on a host. Mite prevalence values were greatest in drone larvae reared in drone cells (0.907 +/- 0.025), followed by drone larvae reared in worker cells (0.751 +/- 0.025), worker larvae reared in worker cells (0.499 +/- 0.025), and worker larvae reared in drone cells (0.383 +/- 0.025). Similar results were found for the average number of mites per host. Our data show that mite levels are affected by environmental factors (cell type), by factors intrinsic to the host (sex), and by interactions between these factors. In addition, colony-to-colony variation is important to the expression of intrinsic and environmental factors.

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“…Honeybee colonies ( Apis mellifera L) have evolved many ways of successfully fighting colony enemies. The study of a number of behavioural and biochemical characteristics of honeybees which potentially determine the ability to control the level of infestation of Varroa jacobsoni Oudemans, has recently been the subject of numerous scientific publications (B ÜCHLER and D RESCHER , 1990; A KIMOV and P ILETSKAYA , 1985; M ORITZ and M AUTZ , 1990; R OSENKRANZ et al., 1993a,b, 1997; M ORITZ , 1994; D E G UZMAN et al., 1995; B IENEFELD , 1996; S PIVAK , 1996; H ARBO and H ARRIS , 1999; J ANMAAT and W ISTON , 2000) The control of this parasite has become increasingly difficult because of V. jacobsoni strains which have evolved resistance to a number of active agents commonly used in apiculture, such as fluvalinate in northern Italy (L OGLIO , 1993; L ODESANI et al., 1995; M ILANI , 1995). Moreover the re‐infestation of treated hives (M ILANI et al., 1993), and a possible accelerated pre‐imaginal development of the parasite (M ARTIN , 1994) reduce the efficiency of chemical and biotechnical treatments.…”

Section: Introductionmentioning

confidence: 99%

Effect of some characters on the population growth of mite Varroa jacobsoni in Apis mellifera L colonies and results of a bi‐directional selection

Lodesani

Moritz

2002

J Applied Entomology

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Two lines of honey bees (Apis mellifera ligustica) were selectively propagated by instrumental insemination using the population growth of the Varroa mite as a criteria. Different infestation rates are at least partially genetic since selection produced significant bi‐directional differences between lines over a period of three subsequent generations. There was no correlation between several behavioural and physiological characteristics which are potentially associated with Varroa resistance (hygienic behaviour, physical damage to mites, infertility of the intruding mites) and the development of the Varroa population after artificial infestation. There was a positive significant correlation between the total mites in the colonies and the amount of reared brood. Colony infestation was also positively correlated with the amount of honey harvested.

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A short test evaluating larval attractiveness of honey bees toVarroa jacobsoni

Cited by 9 publications

References 9 publications

Cuticular volatiles, attractivity of worker larvae and invasion of brood cells by Varroa mites. A comparison of Africanized and European honey bees

Cuticular volatiles, attractivity of worker larvae and invasion of brood cells by Varroa mites. A comparison of Africanized and European honey bees

Effects of Western Honey Bee (Hymenoptera: Apidae) Colony, Cell Type, and Larval Sex on Host Acquisition by Female <I>Varroa destructor</I> (Acari: Varroidae)

Effect of some characters on the population growth of mite Varroa jacobsoni in Apis mellifera L colonies and results of a bi‐directional selection

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