Cocoa pod production has experienced a significant decline due to attacks by the Phytophthora palmivora (P. palmivora) fungus, which is the main cause of cocoa pod rot. To overcome this problem, Titanium dioxide (TiO₂) was chosen because of its potential as an antifungal, and its activity can be increased by adding silver nanoparticles (AgNPs). This research aims to determine the antifungal properties of TiO₂–Ag nanosuspension on the growth of P. palmivora under exposure to UV, Visible and without irradiation. The sol–gel process was used to synthesize TiO₂, and ultrasonics was used to integrate silver nanoparticles into TiO₂. Characterization of UV–Vis diffuse reflectance spectroscopy (UV-DRS) shows a change in the energy gap from 3.24 to 2.82 eV. The Fourier confirmed the crystal structure of the TiO₂-Ag anatase transform infrared spectroscopy (FTIR) spectrum, which showed the stretching vibration peak of the Ti–O and Ag–O bonds (463.88 cm⁻¹). Particle size analysis (PSA) characterization revealed that the nanoscale of TiO₂–Ag was 92.4 nm. The disc diffusion method was used to test the antifungal inhibitory of 0.1%, 0.3%, and 0.5% TiO₂–Ag against P. palmivora. The antifungal activity of the TiO₂–Ag showed strong resistance under exposure to visible light, and the optimum concentration of TiO₂–Ag was 0.5%.

由于棕榈疫霉( P. palmivora ) 真菌的侵袭，可可豆荚产量显着下降，棕榈疫霉菌是可可豆荚腐烂的主要原因。为了克服这个问题，选择二氧化钛（TiO ₂）是因为它具有抗真菌的潜力，并且可以通过添加银纳米颗粒（AgNP）来提高其活性。本研究旨在确定 TiO _{2 –Ag 纳米悬浮液在暴露于紫外线、可见光和无辐射条件下对}P. palmivora生长的抗真菌特性。采用溶胶-凝胶法合成TiO ₂，​​并利用超声波将银纳米粒子整合到TiO ₂中。紫外-可见漫反射光谱 (UV-DRS) 的表征显示能隙从 3.24 eV 变化到 2.82 eV。傅立叶证实了TiO ₂ -Ag锐钛矿变换红外光谱(FTIR)的晶体结构，显示了Ti-O和Ag-O键的伸缩振动峰(463.88 cm ^-1 )。粒度分析（PSA）表征表明TiO ₂ –Ag 的纳米级为92.4 nm。采用纸片扩散法测定了0.1%、0.3%和0.5% TiO ₂ –Ag对棕榈假单胞菌的抑制作用。_{TiO_2} -Ag的抗真菌活性在可见光照射下表现出较强的抵抗力， _{TiO_2} - Ag的最佳浓度为0.5%。