Lavandula latifolia L. is a medicinal plant has fungicidal, antibacterial and antioxidant properties. The aim of this study was to determine the chemical composition, antioxidant and antimicrobial activities of essential oil (EO) of L. latifolia L. extracted by hydrodistillation method. A total of 22 constituents were identified in L. latifolia L. using Gas chromatography–mass spectrometry analysis. The compounds such as, gamma-terpinene (26.8 %), camphor (13.8 %), 1,8-cineole (10.2 %), lavandulol (9.3 %), terpinen-4-ol (9.1 %), linalool (8.9 %), b-elemene (3.2 %), b-pinene (3.1 %), 1,4-cineole (3.07 %), camphene (2.32 %), a-terpineol (2.3 %), and a-copaene (2.2 %) were determined. The antifungal activity of this EO against five phytopathogenic fungi revealed their broad-spectrum and strong antifungal properties. Notably, the EO showed potent activity on Trichophyton mentagrophytes (31 ± 1 mm) and the minimum inhibitory concentration value was 0.125 ± 0.05 μg/mL. The oil, analyzed for its DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS [2,2_-azinobis-(3-ethylbenzothiazoline-6- sulphonic acid)] free radical scavenging activity. Hydrodistilled EO had higher ABTS scavenging capacity than DPPH free radical scavenging power. Essential oil was used to test pesticide activity against Euphoria leucographa (Order: Coleoptera; Family: Scarabaeidae) infected in custard apple (Annona muricata) fruit. Results indicated that the spike lavender EO had contact toxicity on E. leucographa upon topical treatment. The effective concentration at 50 % (EC₅₀) value of EC of L. latifolia L. was 0.37 % revealed considerable fumigant activity mainly due to the presence of fragrant compounds. Interestingly, custard apple (A. muricata) treated with EO effectively controlled the growth of T. mentagrophytes. Overall, antifungal and insecticidal properties of lavender EO, as a natural choice to preserve the harvested fruits thereby protecting the industrial crops.

Lavandula latifolia L. 是一种药用植物，具有杀菌、抗菌和抗氧化特性。本研究的目的是确定的化学组成，精油（EO）的抗氧化剂和抗微生物活性L. latifolia的L.提取采用水蒸气蒸馏法。使用气相色谱-质谱分析在L. latifolia L.中鉴定出总共 22 种成分。诸如γ-萜品烯(26.8 %)、樟脑(13.8 %)、1,8-桉树脑(10.2 %)、薰衣草醇(9.3 %)、萜品烯-4-醇(9.1 %)、芳樟醇(8.9 %)等化合物，b榄香烯（3.2％），b蒎烯（3.1％），1,4-桉树脑（3.07％），莰烯（2.32％），一个α-萜品醇（2.3％），和一个测定了 -copaene (2.2%)。这种 EO 对五种植物病原真菌的抗真菌活性揭示了它们的广谱和强抗真菌特性。值得注意的是，EO 对须癣毛癣菌(31 ± 1 mm)显示出有效的活性，最小抑制浓度值为 0.125 ± 0.05 μg/mL。分析该油的 DPPH（1,1-二苯基-2-苦基肼）和 ABTS [2,2_-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)] 自由基清除活性。水蒸馏的 EO 具有比 DPPH 自由基清除能力更高的 ABTS 清除能力。精油被用于测试杀虫剂对在奶油苹果 ( Annona ) 中感染的Euphoria leucographa (Order: Coleoptera; Family: Scarabaeidae) 的杀虫剂活性muricata) 水果。结果表明，穗状薰衣草 EO在局部治疗后对E. leucographa具有接触毒性。L. latifolia L.的 EC在 50 % (EC ₅₀ )的有效浓度为 0.37 %，显示出相当大的熏蒸活性，这主要是由于芳香化合物的存在。有趣的是，用 EO 处理的奶油苹果 ( A. muricata ) 有效地控制了须癣菌的生长。总体而言，薰衣草 EO 的抗真菌和杀虫特性是保存收获果实从而保护经济作物的自然选择。