In　this　study,　boscalid　silica　nanosphere　nanoparticles　(Bos@SNS/t　Nps)　and　boscalid　bimodal　mesoporous　silicas　material　nanoparticles　(Bos@BMMs　Nps)　were　prepared　using　two　different　methods.　A　comparative　study　on　characteristics　and　properties　of　two　nanospheres　were　conducted.　Both　nanoparticles　had　spherical　shapes　with　average　diameters　of　719.3　+/-　6.3　nm　(Bos@BMMs)　Nps　and　981.3　+/-　4.8　nm　(Bos@SNS/t)　Nps.　The　structures　of　nanoparticles　were　characterized　by　scanning　electron　microscopy,　X-ray　diffraction,　dynamic　light　scattering　laser　particle-size　analysis,　and　fourier　transform　infrared　spectroscopy,　indicating　that　Nps　had　a　well-defined　core-shell　construction　for　efficient　loading　of　Bos.　The　loading　rates　of　Bos@BMMs　and　Bos@SNS/t　Nps　were　25.2　+/-　2.3%　and　27.3　+/-　3.6%,　respectively.　The　nanoparticles　had　obvious　pH　sensitivity,　and　the　release　of　Bos　in　pH　9.0　was　higher　than　those　in　pH　7.0　and　pH　4.0.　No　significant　difference　in　the　release　behavior　of　nanocomposites　was　found,　and　the　release　models　were　fitted　with　the　Weibull　equation.　Finally,　the　bioactivity　of　the　Bos-loaded　nanocomposite　was　measured　against　Rhizoctonia　solani,　which　showed　that　the　fungicidal　efficacy　of　Bos@SNS/t　was　slightly　better　than　that　of　Bos@BMMs.