Uptake and Translocation of a Silica Nanocarrier and an Encapsulated Organic Pesticide Following Foliar Application in Tomato Plants

• DOI: 10.1021/acs.est.1c08185
• Publication Date: 2022-04-25T17:26:33Z
• Authors: Vinicius Bueno; Xiaoyu Gao; Arshath Abdul Rahim; Peiying Wang; Stéphane Bayen; Subhasis Ghoshal
• Keywords: 0301 basic medicine; 03 medical and health sciences; Solanum lycopersicum; Nanoparticles; Biological Transport; Pesticides; Silicon Dioxide

Pesticide nanoencapsulation and its foliar application are promising approaches for improving the efficiency of current pesticide practices, whose losses can reach 99%. Here, we investigated uptake translocation azoxystrobin, a systemic pesticide, encapsulated within porous hollow silica nanoparticles (PHSNs) mean diameter 253 ± 73 nm, following on tomato plants. The PHSNs had 67% loading azoxystrobin enabled controlled release over several days. Thus, nanoencapsulated was taken up distributed more slowly than nonencapsulated pesticide. A total 8.7 1.3 μg quantified in different plant parts, 4 days after 20 single leaf each plant. In parallel, (as Si particulate SiO2) were characterized. translocated 15.5 1.6 μg, rate patterns from their load. Notably, throughout plant, although they much larger known size-exclusion limits (reportedly below 50 nm) tissues, which points to knowledge gaps mechanisms vary significantly nanosilica-encapsulated formulations.