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Population abundance of Varroa destructor and its effects on Apis mellifera scutellata colonies in Kenya
Experimental and Applied Acarology ( IF 2.2 ) Pub Date : 2020-09-29 , DOI: 10.1007/s10493-020-00548-5
Sammy Kiprotich Cheruiyot , Ruth Kahuthia-Gathu , Jenard Patrick Mbugi , Elliud Muli , H. Michael G. Lattorff

The devastating effects of Varroa destructor Anderson and Trueman on Western honeybee colonies (Apis mellifera L.) have been well documented. Not only do these mites cause physical damage to parasitized individuals when they feed on them, but they also transmit viruses and other pathogens, weaken colonies and ultimately may cause their death. Unlike the subspecies of European origin, the honeybees of African origin suffer less from mite infestations. Absconding is one of the factors contributing to low V. destructor population in honeybee colonies as it creates a brood-free period. For a long time, researchers hypothesized that absconding was the main mechanism to control the parasite. The effects of V. destructor are well documented under temperate climatic conditions with a break during winter. Therefore, our study aimed at investigating the impact of V. destructor population growth on colony size, absconding and productivity under natural infestation levels of a tropical/subtropical climate with continuous brood production. We measured several characteristics related to the mite populations, the bee colonies and the resources of the bee colonies for a period of 8 months. The seven colonies that absconded during the study period were not influenced by densities of V. destructor. Absconding of the colonies occurred as a result of low numbers of capped brood. Mite densities were generally low throughout the study period (ranged between 26.9 and 59.8 mites per month) but were positively associated with adult bee densities. The amount of open and capped brood was positively associated with densities of V. destructor in the brood and negatively associated with denisities of V. destructor on screen boards, which appeared as extremely important factors that should be monitored regularly alongside colony stores and availability of pollen.



中文翻译:

肯尼亚Varroa破坏者的种群数量及其对蜜蜂盾cut种群的影响。

Varroa破坏者Anderson和Trueman对西方蜜蜂殖民地(Apis mellifera L.)的毁灭性影响已有充分文献记载。这些螨虫以寄生虫为食时不仅会对他们造成物理伤害,而且还会传播病毒和其他病原体,削弱菌落,最终可能导致其死亡。与欧洲起源的亚种不同,非洲起源的蜜蜂遭受螨虫侵害的几率更低。潜逃是造成蜜蜂种群中无弧菌消灭的原因之一,因为它会造成无雏期。长期以来,研究人员一直认为潜逃是控制寄生虫的主要机制。五,析构函数的影响在温带气候条件下有很好的记录,冬季会休息。因此,我们的研究旨在调查在连续繁殖繁殖的热带/亚热带气候的自然侵染水平下,毁灭弧菌种群增长对种群规模,潜逃和生产力的影响。我们在8个月的时间内测量了与螨虫种群,蜂群和蜂群资源有关的几个特征。在研究期间潜逃的七个菌落不受V. destructor密度的影响。菌落逃逸的发生是由于加盖的亲虾数量少所致。在整个研究期间,螨的密度通常较低(范围在每月26.9至59.8螨之间),但与成年蜜蜂的密度呈正相关。开放的和封闭的巢的数量与V的密度正相关。析构函数在育雏和与denisities负相关V.析构函数在屏幕上板,这似乎为应定期殖民地旁边的商店和花粉的有效性进行监测非常重要的因素。

更新日期:2020-09-29
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