Uptake and Distribution of Fenoxanil-Loaded Mesoporous Silica Nanoparticles in Rice Plants

Abstract

Mesoporous silica nanoparticles (MSNs) can be used as carriers to deliver pesticides into plants, which is considered to be one method of improving the efficacy of pesticide usage in agricultural production. In the present work, MSNs with an average diameter of 258.1 nm were synthesized and loaded with Fenoxanil. The structure of the nanocarriers was observed by scanning electron microscopy. The loading content of Fenoxanil-loaded MSNs was investigated. After rice plants in a hydroponic system were treated with loaded MSNs, the concentrations of Fenoxanil in different samples were determined using high-performance liquid chromatography–tandem mass spectrometry. The results suggested that rice plants can absorb MSNs from water through their roots, and the dosage has almost no effect on the distribution of Fenoxanil in rice plants. The application of pesticide-loaded nanoparticles in a hydroponic system poses a low risk of Fenoxanil accumulation in rice.

A Light-Triggered pH-Responsive Metal–Organic Framework for Smart Delivery of Fungicide to Control Sclerotinia Diseases of Oilseed Rape

“…Furthermore, a small amount of Pro could be transported from the roots to the leaves in plants, and the Pro concentration of PD@ZIF-8 (190.6 ± 14.6 μg/g) was slightly higher than that of Pro (159.7 ± 2.6 μg/g). These results showed that the ZIF-8 nanoparticles can carry substances that were difficult for the plant to uptake, such as some pesticides, especially nonsystemic pesticides, which may improve the content distribution of active substances in plants and effective utilization rate …”

“…The use of synthetic pesticides (including herbicides, insecticides, fungicides, and other agrochemicals) in agriculture has increased steadily to 3.5 billion kg/year of active ingredient, whereas the actual utilization of biological target uptake is <0.1% . This is because most pesticides are directly lost to the environment through leaching, evaporation, and drifting during spraying or are degraded by light, temperature, and microorganisms. , Moreover, several nonsystemic pesticides are not absorbed or only small amounts are absorbed by the plant, which significantly reduces the efficiency rate of pesticides . All these problems will gradually lead to environmental pollution and ultimately threaten human health.…”

“…4,5 Moreover, several nonsystemic pesticides are not absorbed or only small amounts are absorbed by the plant, which significantly reduces the efficiency rate of pesticides. 6 All these problems will gradually lead to environmental pollution and ultimately threaten human health. Hence, delivering pesticides to the exact target site and accurate release without losing effectiveness is highly desirable in both agricultural and environmental chemistry.…”

Nano-enabled agriculture: from nanoparticles to smart nanodelivery systems

“…Active molecules may also be entrapped inside NPs to protect host molecules from unexpected degradation. For example, mesoporous silica nanoparticles (MSN) have demonstrated potential for delivering prochloraz in cucumber (Zhao et al 2018) and fenoxanil in rice (Zhu et al 2018).…”

Preparation of thermosensitive buprofezin‐loaded mesoporous silica nanoparticles by the sol–gel method and their application in pest control

“…The yield and quality of grain have become primary problems to be solved in agriculture all over the world 1–3 . In grain production, pesticides are used to reduce the damage of plant diseases, pests and weeds 4–6 . However, the traditional pesticide formulations, such as emulsifiable concentrate, wettable powder, suspension concentrate and water‐dispersible granule, have low utilization rate of active ingredients, resulting in high control cost, pest resistance, high toxicity to mammals and environmental pollution 7–10 …”