Fatima Maham, Anjum Tehmina, Manzoor Mujahid, Aftab Muzammil, Aftab Zill-E-Huma, Akram Waheed, Bokhari Najat A, Rizwana Humaira, Nabi Ghulam, Li Guihua
Institute of Zoology, University of the Punjab, Lahore, Pakistan.
Department of Plant Pathology, Faculty of Agricultural Sciences, University of the Punjab, Lahore, Pakistan.
Sci Rep. 2025 Apr 1;15(1):11102. doi: 10.1038/s41598-024-82841-6.
The dusky cotton bug is a small insect that poses a significant threat to cotton crops. Due to increasing reports on the development of resistance in this insect against insecticides, efforts to control this pest must involve other environment-friendly strategies. The use of nanoparticles (NPs) has generated an alternative pest control. The objective of this study was to evaluate the insecticidal effect of green synthesized titanium dioxide nanoparticles (TiO) NPs using latex of Calatropis procera against dusky cotton bug 2nd and 4th instar nymph and adult stage. The optical properties of the synthesized nanoparticles were confirmed through UV-Vis spectroscopy whereas, surface morphology was checked through Scanning Electron Microscopy. A detailed XRD analysis of the synthesized particles confirmed that the particles belong to the anatase phase, of the tetragonal crystal system. When checked for their insecticidal potential against dusky cotton bugs (2nd and 4th instar nymph and adult stage) through the leaf dip method, the nanoparticles-controlled insect population was up to 95% with highest in 2nd instar nymphs and lowest in adults. However, the insecticidal activity was found directly proportional to the concentration of nanoparticles used.
棉红蝽是一种对棉花作物构成重大威胁的小型昆虫。由于关于这种昆虫对杀虫剂产生抗药性的报道日益增多，控制这种害虫的工作必须涉及其他环保策略。纳米颗粒（NPs）的使用带来了一种替代性的害虫控制方法。本研究的目的是评估利用牛角瓜乳胶绿色合成的二氧化钛纳米颗粒（TiO NPs）对棉红蝽二龄和四龄若虫及成虫阶段的杀虫效果。通过紫外可见光谱确认了合成纳米颗粒的光学性质，而通过扫描电子显微镜检查了表面形态。对合成颗粒进行的详细X射线衍射分析证实，这些颗粒属于四方晶系的锐钛矿相。当通过浸叶法检测其对棉红蝽（二龄和四龄若虫及成虫阶段）的杀虫潜力时，纳米颗粒控制的昆虫种群数量高达95%，其中二龄若虫中最高，成虫中最低。然而，发现杀虫活性与所用纳米颗粒的浓度成正比。
