利用草酸糖液於蜂群繁殖期防治蜂蟹蟎

The Control of Varroa destructor Using Oxalic Acid Syrup in Brood-right Honeybee Colonies

陳裕文(Yue-Wen Chen) ； 陳保良(Pao-Liang Chen)

《台灣昆蟲》 28卷1期 (2008/03) Pp. 31-41

https://doi.org/10.6661/TESFE.2008004

摘要

Varroa destructor is an ectoparasite of serious economic importance to beekeeping in Taiwan. In this study, we evaluated the efficacy of the oxalic acid (OA) sugar solution against varroa mites in brood-right honeybee colonies. In laboratory trials, each comb was sprayed with 4 mL solution containing 0-4% OA and 30% sugar. The 3% OA treatment gave the best results and caused 81.8±6.3% mite mortality at 48 h post-treatment. It also did not cause any additional deaths of treated adult workers. Field trials were conducted in I-Lan, Taiwan. Honeybee colonies received five successive applications (at intervals of 3-4 days) with 3% OA syrup by spraying method with two alternative doses (2 mL or 4 mL OA per comb). These treatments resulted in 72.6±11.3% and 82.4±3.8% mite mortality, respectively. There was a significant difference (p＜0.05) between them. In the experimental honeybee colonies, neither of the two treatments reduced the area of capped cells nor the ratio of larval development into the capped stage. These results suggest that repeated spray applications of OA syrup is effective for the control of varroa mites in brood-right honeybee colonies.

關鍵字

草酸 ； 蜂蟹蟎 ； 蜜蜂 ； 防治

並列摘要

Varroa destructor is an ectoparasite of serious economic importance to beekeeping in Taiwan. In this study, we evaluated the efficacy of the oxalic acid (OA) sugar solution against varroa mites in brood-right honeybee colonies. In laboratory trials, each comb was sprayed with 4 mL solution containing 0-4% OA and 30% sugar. The 3% OA treatment gave the best results and caused 81.8±6.3% mite mortality at 48 h post-treatment. It also did not cause any additional deaths of treated adult workers. Field trials were conducted in I-Lan, Taiwan. Honeybee colonies received five successive applications (at intervals of 3-4 days) with 3% OA syrup by spraying method with two alternative doses (2 mL or 4 mL OA per comb). These treatments resulted in 72.6±11.3% and 82.4±3.8% mite mortality, respectively. There was a significant difference (p＜0.05) between them. In the experimental honeybee colonies, neither of the two treatments reduced the area of capped cells nor the ratio of larval development into the capped stage. These results suggest that repeated spray applications of OA syrup is effective for the control of varroa mites in brood-right honeybee colonies.

並列關鍵字

oxalic acid ； Varroa destructor ； honeybee ； control