Assessing Repeated Oxalic Acid Vaporization in Honey Bee (Hymenoptera: Apidae) Colonies for Control of the Ectoparasitic Mite Varroa destructor (original) (raw)
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Journal of Animal and Plant Sciences
The research work was carried out to determine the effects of oxalic acid (OA) on reducing ectoparasitic mite Varroa destructor Anderson and Trueman (Acari:Varroidae) populations in honeybee Apis mellifera linguistica (Hymenoptera: Apidae) colonies in the fall at Honey bee Research Institute, National Agricultural Research centre, Islamabad. Twenty honeybee colonies were used in this experiment. Colonies were divided into four groups of five colonies each. Oxalic acid was applied in sugar syrup with 4.2, 3. 2 and 2.1% concentrations. The OA with different concentrations was tricked directly on the adult honey bees in between two frames using a syringe applied thrice on different dates at five days interval. Average efficacy of OA with 3.2, 4.2 and 2.1 % was 95, 81 and 46 % respectively. No queens were lost, and there was no adult honeybee mortality in any of the colonies during the experiment. It can be concluded that 3.2% OA concentration are very effectively control varroa mite an...
Use of oxalic acid to control Varroa destructor in honeybee (Apis mellifera L.) colonies
Turkish Journal of Veterinary and Animal Sciences, 2009
This study was carried out to determine the effects of oxalic acid (OA) on reducing Varroa mite (Varroa destructor) populations in honeybee (Apis mellifera L.) colonies in the fall. Twenty honeybee colonies, in wooden Langstroth hives, were used in this experiment. Average Varroa infestation levels (%) of the OA and control groups were 25.87% and 24.57% on adult workers before the treatments. The OA treatments were applied twice, on 3 November and 13 November 2006. Average Varroa infestation levels were 5.24% and 31.43% after the first application and 2.87% and 41.74% after the second application in the OA and control groups, respectively. Average efficacy of OA was 93.40%. No queens were lost, and there was no brood or adult honeybee mortality in any of the colonies during the experiment.
Using oxalic acid in water solution in control of Varroa mites and its influence on honey bees
We studied the toxicity of water solutions containing various concentrations of oxalic acid dihydrate to bees and Varroa mites (Varroa destructor) using by spraying honey bee (Apis mellifera) colonies with no brood or little brood in beehive conditions in West-Viru County, Estonia. A water solution of 0.5% OA gave effective control of the mite and was not toxic to bees whereas higher concentrations of OA (1.0 and 1.5%) were highly toxic to bees. In autumn, spraying test colonies that had little capped brood once or twice with a 0.5% OA solution gave effective mite control (92.94 ± 0.01% and 91.84 ± 0.02%, respectively) with no noticeable toxicity to bees.
Journal of Insect Science, 2023
Oxalic acid (OA) is a popular miticide used to control Varroa destructor (Mesostigmata: Varroidae) in western honey bee (Apis mellifera L.) (Hymenoptera: Apidae) colonies. Our aim was to investigate which method of OA application (dribbling, fogging, or vaporizing) was the most effective at reducing V. destructor infestations (Experiment 1) and to improve upon this method by determining the treatment interval that resulted in the greatest V. destructor control (Experiment 2). We used the product Api-Bioxal (97% OA) and maintained 40 honey bee colonies (10/treatment) in both experiments. In Experiment 1, the treatments included (i) dribbling 50 ml of 3% OA solution, (ii) vaporizing 4 g of solid OA, (iii) using an insect fogger supplied with 2.5% OA dissolved in ethyl alcohol, and (iv) an untreated control. After 3 weeks, only the vaporization method reduced V. destructor infestations (from 9.24 mites/100 bees pretreatment to 3.25 mites/100 bees posttreatment) and resulted in significantly increased brood amounts and numbers of adult bees over those of the controls. In Experiment 2, all colonies were treated with 4 applications of OA via vaporization at a constant concentration of 4 g OA/colony. In this experiment, the groups were separated by treatment intervals at either 3-, 5-, or 7-day intervals. We observed that 5-and 7-day treatment intervals significantly reduced V. destructor populations from pretreatment levels over that of the controls and 3-day intervals. Our data demonstrate the efficacy of OA in reducing V. destructor infestation, particularly vaporizing 4 g every 5-7 days as the most effective method of application.
2013
2 Abstract: The proposed research work was conducted in January, 2012 at Honeybee Research Institute of National Agricultural Research Centre, Islamabad on Apis mellifera lingustica honeybee colonies infested with the Varroa destructor. Treatments were given by dividing experimental colonies into three groups (formic acid, oxalic acid and control). Oxalic acid 3.2% (T ), Formic acid 65% (T ) and control (T ) were applied in seven 1 2 3 replications each for four weeks. The treatments were given randomly by using complete randomized design (CRD). The maximum mean number 635 ± 4.31 (Mean ± SE), 305±3.82 (Mean ± SE) and 103±3.30 (Mean ± SE) of mites collected in mite collection trays treated with T , T and T respectively and the difference between the 12 3 treatments was highly significant. The efficacy and honey yield from the experimental colonies were also highly significant difference than the controls. The highest mean efficacy 91± 0.26 (Mean ± SE) and honey yield 24± 0.44 (Mean ±...
In honeybee colonies, insufficient struggle against diseases and parasites or the use of wrong drugs at wrong time which reduce the productivity of colonies significantly. Additionally, these kinds of wrong applications can also threaten the human health because of chemical residues. Varroa destruc-tor, which affects negatively the colony productivity , is the most important external parasite of the honeybees (Apis mellifera L.). Therefore, beekeep-ers have to use many different synthetic miticides for reducing or preventing the V. destructor damages. This study was carried out to determine the possible effects of ocalic acid treatment in different seasons on V. destructor population in honeybee colonies. Ten of total twenty honebee colonies had similar in-festetion levels which were used for treatment group and ten colonies were also used as the control group. Average efficacies of oxalic acid treatment in different seasons on Varroa population in honeybee colonies in early spring (in March), summer (in June) and late autumn (in October) were found to be 80.22%, 69.72% and 84.61%, respectively (P<0.01). These results showed that oxalic acid treatment in late autumn and early spring against varroa in honeybees were about 21% and 15% more effective than summer , respectively.
Pakistan Journal of Zoology, 2012
The effectiveness of oxalic acid (3.2%), formic acid (65%) and flumethrin strip (Bayvarol) for the control of Varroa destructor (Anderson and Trueman) mite in broodless honeybee (Apis mellifera lingustica Linnaeus) colonies was determined. Three groups of five colonies each were treated with one of these agents, while the fourth group of five colonies was used as control. Mite mortality was examined in debris at 4-day intervals before application of the next treatment. The highest number of fallen mites 177±35.12 (Mean ± SE) occurred with oxalic acid and the difference between the treatments was highly significant. The efficacy and honey yield from the experimental colonies were also highly significantly different from the controls. The highest mean efficacy of 99±1.24 and honey yield 12.08± 0.86 was found in 3.2% oxalic acid treatment. No queens were lost and adult honeybee mortality did not occur in any of the colonies during the experiment.
Animals
The requirement for the protection of bee colonies against Varroa destructor invasions has been noted by many breeders and is included as an aspect of the development of beekeeping. This research aimed to check the effect of the development of a colony exposed to laying eggs (brood surface) by queen bees with similar chemical potential (sisters) on the effect of a preparation combating V. destructor depending on the number of mites found in a given colony. We chose this as a standard model of conduct that treats each bee colony as one organism subjected to individual parasite control. For this purpose, we created a bee colony with a mother-of-one breeding line and fertilised drones from one colony. Infection with V. destructor occurred naturally and uncontrollably. Without interfering with the colony’s development, the frame insulator helped each colony’s brood (mothers’ reproductive potential) and the initial and final individuals from the mites themselves. The study was carried ou...