Tackling the future challenges of Organic Animal Husbandry - vTI

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! Agriculture and Forestry Research, Special Issue No 362 (Braunschweig, 2012) ISSN 0376-0723 Download: www.vti.bund.de/en/startseite/vti-publications/landbauforschung-special-issues.html based control resulted in significantly higher mite mortality. Other technological factors may have important role in the control strategy against Varroa destructor especially in organic apiculture. Developing drone brood was removed as general recommendation in mite control in organic beekeeping. The Hungarian commercial organic beekeepers need at least 90% of efficacy against Varroa. Oxalic acid solution is effective mainly in the broodless periods. In our case no significant difference was found between the two oxalic acid Treatments No. 2 and 4. If other technological tools are properly applied and there is no reinfestation of colonies one treatment ensured over 80% and 90% efficacy in 2006 and 2009, respectively. In Treatment 4 the lower efficacy was calculated in 2006. The daily mite drop was only 10 during the first application in both years. It seems that the limited brood conditions could not ensure higher mite mortality thus within the brood present mites could survive and propagate. Discussion In organic apiculture mite control is different than in the conventional ones. The so-called soft type of acaricides may ensure colony survival and strength with an accepted honey yield level. The decision and application of control materials need wider information and the ability of frequent monitoring of bee and mite population. Colony and environmental conditions may significantly modify control efficacy thus flexibility and the adjustment of technology may be required. Suggestions to tackle the future challenges of organic animal husbandry The control of Varroa destructor is a key element of the organic strategy as well. The wider health condition of the colony highly depends on this success. Divers bee pastures may help colony maintenance and honey production too. During the long sealed brood period the lower control efficacy may decrease colony vitality and wintering. References Calderone, N.W., (1999): Evaluation of formic acid and a thymol-based blend of natural products for the fall control of Varroa jacobsoni (Acari: Varroidae) in colonies of Apis mellifera (Hymenoptera: Apidae). J. Econ. Entomol. 92, 253–260 Fries, I., Wallner, K., Rosenkranz, P., (1998): Effects on Varroa jacobsoni from acaricides in beeswax. J. Apicult. Res. 37, 85–90. Fries, I., (1991): Treatment of sealed honey-bee brood with formic-acid for control of Varroa jacobsoni. Am. Bee J. 131 (5), 313–314 Higes, M., Meana, A., Suarez, M., Llorente, J., (1999): Negative long-term effects on bee colonies treated with oxalic acid against Varroa jacobsoni Oud. Apidologie 30 (4), 289–292. Nanetti, A., Büchler, R., Charriere, J.D., Fries, I., Helland, S., Imdorf, A., Korpela, S., Kristiansen, P., 2003: Oxalic acid treatments for Varroa control (Review). Apiacta 38, 81–87. Rademacher, E., Harz, M., (2006): Oxalic acid for the control of varroosis in honey bee colonies – a review. Apidologie 37 (1), 98–120. vanEngelsdorp, D., Underwood, R.M., Cox-Foster, D.L., (2008): Short-term fumigation of honey bee (Hymenoptera: Apidae) colonies with formic and acetic acids for the control of Varroa destructor (Acari: Varroidae). J. Econ. Entomol. 101 (2) 256–264. 472
RAHMANN G & GODINHO D (Ed.) (2012): Tackling the Future Challenges of Organic Animal Husbandry. Proceedings of the 2 nd OAHC, Hamburg/Trenthorst, Germany, Sep 12-14, 2012 Miscellaneous 473
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Sonderheft 362 Special Issue Tackli
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Landbauforschung vTI Agriculture an
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Foreword Organic animal husbandry s
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RAHMANN G & GODINHO D (Ed.) (2012):
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Content RAHMANN G & GODINHO D (Ed.)
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Introduction RAHMANN G & GODINHO D
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Abstract RAHMANN G & GODINHO D (Ed.
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Discussion RAHMANN G & GODINHO D (E
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Factors Plant Height (cm) RAHMANN G
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