GC-MS Analysis and Evaluation of Essential Oils as Volatile Biopesticides: Assessing Their Acaricidal Potential against Varroa destructor

Agriculture, Journal Year: 2024, Volume and Issue: 14(6), P. 940 - 940

Published: June 16, 2024

Honey bees are crucial for ecosystem pollination and honey production, yet the Varroa destructor mite hinders their productivity health. Efforts to manage mites with synthetic pesticides have had limited success, highlighting need naturally derived acaricides as a primary option. However, acaricidal efficacy of essential oils from Salvia officinalis L. (sage), Cannabis sativa (hemp), Laurus nobilis (laurel) remains be fully understood. This study aims investigate these three at varying concentrations impact on focusing efficient reduction in mites. The sugar roll method was employed assess infestation levels, while GC-MS analysis utilized verify composition oils. production measurements were also performed. rates (%) 15%, 10%, 5% hemp oil 95.4% ± 0.30%, 85.71% 0.85%, 64.48% 0.26%, respectively; sage oil, they 81.08% 0.57%, 69.42% 1.72%, 50.35% 0.70%; laurel 68.96% 0.34%, 54.66% 0.37%, 33.58% respectively. Key compounds identified include trans-caryophyllene, α-pinene, viridiflorol oil; myrcene, limonene, β-caryophyllene phytol, β-myrcene, n-heneicosane oil. overall findings indicate that is highly effective controlling further research needed evaluate its potential side effects ensure sustainability safety.

Language: Английский

Efficacy of thymol nanoemulsion against Varroa destructor mites infesting Apis mellifera colonies under the stress of abiotic factors in Egypt

Egyptian Journal of Basic and Applied Sciences, Journal Year: 2024, Volume and Issue: 11(1), P. 626 - 643

Published: July 31, 2024

Varroa destructor is a serious pest threats honey bees health worldwide. This study aims to evaluate the effect of thymol nanoemulsion against Varroa. The experiment comprised four colony groups; control, emulsion (Th) 100 ppm, (NTh) 50, and NTh 25 ppm. ppm was most potent with insignificant difference no correlation temperature, followed by Th 50 control groups fallen 70.45%, 67.59%, 60.08% 51.49%, respectively. group exhibited moderate candy consumption (45%) when compared (47.35%) (52.09%) differences. pollen significantly highest in (41.59%) (36.73%), (33.99%) (33.69%) groups. has lowest percentages. Thymol nanoparticle size (17.6 nm), high zeta potential (-20.1 mv) low diversity index (0.383) revealed stability. So, may decline residues sensitivity temperature increase affordability one-quarter. Moreover, enhance immunity.

Language: Английский