Carvone and citral, two promising compounds for controlling the honey bee ectoparasitic mite, Varroa destructor

被引:4
作者
Sabahi, Qodratollah [1 ,2 ]
Kelly, Paul Gordon [2 ]
Guzman-Novoa, Ernesto [2 ]
机构
[1] Univ Tehran, Coll Agr & Nat Resources, Dept Plant Protect, Tehran, Karaj, Iran
[2] Univ Guelph, Sch Environm Sci, Guelph, ON, Canada
关键词
acaricides; honey bees; plant compounds; selectivity ratio; toxicity; Varroa destructor; PLANT ESSENTIAL OILS; APIS-MELLIFERA; ACARICIDAL ACTIVITY; JACOBSONI OUD; HYMENOPTERA; REPELLENT; RESIDUES; COLONIES; 1,8-CINEOLE; COMPONENTS;
D O I
10.1111/jen.13039
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Varroa destructor (Acari: Varroidae) is an external parasitic mite that has compromised honey bee (Hymenoptera: Apidae) health worldwide. Varroa mite resistance to commercial formulations of synthetic acaricides has led to an increasing need for new compounds to control mite infestations in honey bee colonies. Thus, essential oils and plant extracts have been used by organic producers concerned about the environment because they are low-risk pesticides. This study tested the toxicity of four natural compounds: carvone, citral, cineole and limonene to mites and bees under laboratory conditions. Tau-fluvalinate was used as positive control. Seven concentrations with logarithmic interval were used to test each compound. The safety margin of the compounds for the bees was calculated from selectivity ratios. Carvone was significantly more toxic to varroa mites (LC50 = 272.74 mu g/ml) than the other three compounds but did not differ with tau-fluvalinate (LC50 = 272.30 mu g/ml). Citral was the second most toxic compound to mites (LC50 = 318.54 mu g/ml), followed by cineole (LC50 = 3897.65 mu g/ml) and limonene (LC50 = 3003.94 mu g/ml). Citral and carvone showed low toxicity to worker bees at both 24 and 48 hpt. The LD50 values for citral, carvone and tau-fluvalinate were 78,459, 106,620 and 143.02 mu g/ml at 24 hpt, respectively, which were significantly different from each other. The relative selectivity ratios calculated for carvone, citral and tau-fluvalinate were 390.9, 246.3 and 0.53, respectively. This study provides preliminary laboratory evidence for the effectiveness and safety of two plant compounds, carvone and citral, that could potentially be used for the control of V. destructor infestations in honey bee colonies.
引用
收藏
页码:1003 / 1010
页数:8
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