AsummaryofanarticlewrittenbyIngemarFriesandHenrikHansenin1993.
Intwoexperiments,theinfluencefromtrappingcombtecniqueonthenaturalmortalityofmitesfrominfestedhoneybeecolonieswasinvestigatedinaNordicclimate.
Twoapiaries,AandB,with17colonieseachwereused.Thenaturalmortalityofmiteswasfollowedinbothapiariesfrommid-Maytomid-Novemberwithvaryingintervalsbetweeneachcounting.InapiaryAameshbottomwasusedallowingpracticallyallmitesfallingfromthebeestobecounted.InapiaryBaplasticscreentocollectmites,covering53%ofthebottomwasplacedinthecenterofthebottomboard.
ThefirsttrappingcombwasintroducedonJune20inapiaryB,andJune21inapiaryA.Thetrappingdevicewasacagebuiltfromplasticqueenexcluders.InapiaryAthemethodofMaulwithninedaysbetweeneachcombshiftwasused.
InapiaryB,theintervalsbetweeneachcombshiftweresevendaysbutwiththethirdcombremaininginthecagewithoutthequeenuntilpracticallyallbroodwassealedninedaysafterthequeenwasreleasedfromthecage.
Allcombsthatwereremovedfromthecoloniesweremarkedwiththecolonynumberandplacedinthedeepfreezer.Laterallcombswereuncappedandthemiteswashedoutwithahandshoweroverameshandsubsequentlycounted.
InapiaryB,fivecoloniesweremanagedtoensurethatnosealedbroodwaspresentwhenthethirdtrappingcombwasremoved.Atthistime,thesecoloniesweretreatedwithtwoapplicationsofPerizinattwo-dayintervalsandthemitemortalitywascounted.
Infigure3and4,theaveragedailymitemortalityinapiaryAandBrespectively,isshown.Although,atslightlydifferentlevels,bothapiariesshowroughlythesamepattern;asuccessiveincreaseinthemortalitylevelassummerproceeds,withadramaticreductionwhennosealedbroodhatchesinthecoloniesbecauseofthebroodremoval.
Thetimerequiredtocompletethetrappingcombmethodwasestimatedto45-60minutes/colony.Noreductioninhoneyyieldwasnoticedduringtheexperiment,whentherewasnolatehoneyflow.湖北天马养蜂场，加我们的微信一起学养蜂。
ThepresentedresultssupportthehypothesisthatthetrappingcombsystemcouldbesufficientinaNordicclimate.ThisiscontrarytotheresultspresentedbyMaul,wherethemitepopulationinsouthernGermany,judgedfromthemitemortality,isallowedtoincreasesubstantiallyafterthetrappingcombperiod.