Ghosh Avirup, Majumdar Dipanwita, Biswas Himani, Chowdhury Anupam, Podder Sanjoy
Ecology and Allergology Lab, Department of Zoology, Golapbag Campus, The University of Burdwan, Burdwan, 713104, West Bengal, India.
Department of Chemistry, Chandernagore College, Hooghly, Chandannagar, 712136, West Bengal, India.
Sci Rep. 2025 Jan 27;15(1):3414. doi: 10.1038/s41598-025-87727-9.
The jute hairy caterpillar, Spilosoma obliqua (Lepidoptera: Erebidae) is considered as one of the major threats to jute cultivation. The best eco-friendly methods to combat these jute pests involve administration of nano-biopesticides, as a successful alternative to the toxic chemicals. In this study, a nano-biopesticide formulation containing green synthesized silver nanoparticles (Ag NPs) using Ocimum sanctum leaf extract has been proposed. The characterization studies confirmed significant interactions between the Ag NPs and bioactive components in the nano-biopesticide formulation. The comparative analysis of the aforementioned larval mortality showed better responses in the nano-biopesticide formulation rather than the crude (pure) leaf extract. The LC values were calculated both for the nano-biopesticide formulation and pure extract after 24, 48 and 72 h of treatment. The nano-biopesticide formulation was found to exhibit the lowest and much promising LC value of 93.21 ppm, 23.38 ppm, 5.96 ppm relative to that of LC values of 1590.74 ppm, 459.30 ppm, 102.68 ppm respectively for the crude leaf extract. The synergistic interactions between the components in the nano-biopesticide formulation can be associated with its greater effectiveness as a promising toxicant to the larvae of the jute caterpillar compared to the mere leaf extract, thereby, demonstrating a greener and safer method for effective pest management.
黄麻毛虫，斜纹黄毒蛾（鳞翅目：夜蛾科）被认为是黄麻种植的主要威胁之一。对抗这些黄麻害虫的最佳生态友好方法包括施用纳米生物农药，作为有毒化学物质的成功替代品。在本研究中，提出了一种使用罗勒叶提取物绿色合成银纳米颗粒（Ag NPs）的纳米生物农药制剂。表征研究证实了纳米生物农药制剂中Ag NPs与生物活性成分之间存在显著相互作用。上述幼虫死亡率的比较分析表明，纳米生物农药制剂的反应优于粗提物（纯叶提取物）。在处理24、48和72小时后，计算了纳米生物农药制剂和纯提取物的LC值。发现纳米生物农药制剂的LC值最低且前景广阔，分别为93.21 ppm、23.38 ppm、5.96 ppm，而粗叶提取物的LC值分别为1590.74 ppm、459.30 ppm、102.68 ppm。纳米生物农药制剂中各成分之间的协同相互作用可能与其作为黄麻毛虫幼虫的一种有前景的毒物比单纯的叶提取物具有更高的有效性有关，从而证明了一种更绿色、更安全的有效害虫管理方法。
