Nano-enabled pesticides for sustainable agriculture and global food security

Wang, Dengjun; Saleh, Navid B.; Byro, Andrew; Zepp, Richard G.; Sahle‐Demessie, Endalkachew; Luxton, Todd P.; Ho, Kay T.; Burgess, Robert M.; Flury, Markus; White, Jason C.; Su, Chunming

doi:10.1038/s41565-022-01082-8

Cited by 296 publications

(259 citation statements)

References 99 publications

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decades, including climate change, planetary health, and food security. [1][2][3][4][5][6] To achieve this goal, principles of sustainability, green chemistry, biodegradation, and circular life cycle have to underpin the design of new technologies that reduce environmental pollution and decrease greenhouse gas emissions while enhancing the quality of life. [7,8] Nonetheless, the ever increase in human population pressures stakeholders in the manufacturing, agrofood, water and energy infrastructures to rise their outputs using linear materials derived from oil that are readily available, cost-efficient but often follow make-take-discard practices.

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confidence: 99%

Microencapsulation of High‐Content Actives Using Biodegradable Silk Materials

Liu

Millard

Urch

et al. 2022

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There is a compelling need across several industries to substitute non‐degradable, intentionally added microplastics with biodegradable alternatives. Nonetheless, stringent performance criteria in actives’ controlled release and manufacturing at scale of emerging materials hinder the replacement of polymers used for microplastics fabrication with circular ones. Here, the authors demonstrate that active microencapsulation in a structural protein such as silk fibroin can be achieved by modulating protein protonation and chain relaxation at the point of material assembly. Silk fibroin micelles’ size is tuned from several to hundreds of nanometers, enabling the manufacturing—by retrofitting spray drying and spray freeze drying techniques—of microcapsules with tunable morphology and structure, that is, hollow‐spongy, hollow‐smooth, hollow crumpled matrices, and hollow crumpled multi‐domain. Microcapsules degradation kinetics and sustained release of soluble and insoluble payloads typically used in cosmetic and agriculture applications are controlled by modulating fibroin's beta‐sheet content from 20% to near 40%. Ultraviolet‐visible studies indicate that burst release of a commonly used herbicide (i.e., saflufenacil) significantly decreases from 25% to 0.8% via silk fibroin microencapsulation. As a proof‐of‐concept for agrochemicals applications, a 6‐day greenhouse trial demonstrates that saflufenacil delivered on corn plants via silk microcapsules reduces crop injury when compared to the non‐encapsulated version.

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confidence: 99%

Microencapsulation of High‐Content Actives Using Biodegradable Silk Materials

Liu

Millard

Urch

et al. 2022

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“…Shen et al report multifunctional nanoplatform, carboxymethyl chitosan-modified carbon nanoparticles as the carrier for EB via simple physisorption process; the nanoformulation showed improved solubility and dispersion stability in aqueous solution, exhibited pH-responsive controlled release performance, and enhanced anti-UV property, leading to superior pest control performance [ 42 ]. The insecticidal activity differences between EB-EC and DSPE-EB nanoparticles can be explained as active ingredient in the nanoparticles provided an effective way to avoid the photolysis and prolong the effective duration of EB [ 16 ]. Meanwhile, high adhesion ability and retention, as well as the sustained release performance of the DSPE-EB nanoparticles, lead to a high insecticidal performance.…”

Section: Discussionmentioning

confidence: 99%

“…Over the past few decades, advanced polymeric materials have gained popularity in the development of sustainable agricultural applications [ 9 , 10 , 11 , 12 ]. The encapsulation of polymeric materials can improve the application of hydrophobic pesticides, increasing their solubility in water and the permeability of plant tissues, which in turn enhance the pesticides spreading and wetting properties while reducing the volatilization and degradation of active ingredients and improving the biocompatibility and environmentally friendliness [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of an Environmentally Friendly Nano-Insecticide through Encapsulation in Polymeric Liposomes and Its Insecticidal Activities against the Fall Armyworm, Spodoptera frugiperda

Chen

Qiu

Liu

et al. 2022

Insects

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The insecticide emamectin benzoate (EB) was formulated with nanoparticles composed of DSPE-PEG2000-NH2 by the co-solvent method to determine its adverse impacts on the environment and to reinforce its dispersion, adhesion, and biocompatibility. A good encapsulation efficiency (70.5 ± 1.5%) of EB loaded in DSPE-PEG2000-NH2 polymeric liposomes was confirmed. Dynamic light scattering (DLS), transmission electron microscopy (TEM), and contact angle meter measurements revealed that the DSPE-EB nanoparticles had a regular distribution, spherical shape, and good leaf wettability. The contact angle on corn leaves was 47.26°, and the maximum retention was higher than that of the reference product. DSPE-EB nanoparticles had strong adhesion on maize foliage and a good, sustained release property. The efficacy trial showed that the DSPE-EB nanoparticles had a strong control effect on S. frugiperda larvae, with the LC50 of 0.046 mg/L against the third-instar S. furgiperda larve after 48 h treatment. All these results indicate that DSPE-EB nanoparticles can serve as an insecticide carrier with lower environmental impact, sustained release property, and effective control of pests.

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“…Nanotechnology can improve the biological activity of pesticides and is associated with enhanced efficacy, reduced input, and lower ecotoxicity [ 33 , 34 , 35 ]. Typically, metal-based nanomaterials (NMs), including Ag, Zn, and Cu-based nanoparticles (NPs), are the most common nanopesticides, which have an excellent effect for controlling plant pathogens, including bacteria and fungus [ 36 ]. For example, Ag@dsDNA@GO composites at 100 ppm significantly reduced the severity of bacterial spot disease on tomato in a greenhouse [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Abilities of Three Kinds of Copper-Based Nanoparticles to Control Kiwifruit Bacterial Canker

et al. 2022

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Kiwifruit bacterial canker caused by Pseudomonas syringae pv. actinidiae reduces kiwifruit crop yield and quality, leading to economic losses. Unfortunately, few agents for its control are available. We prepared three kinds of copper-based nanoparticles and applied them to control kiwifruit bacterial canker. The successful synthesis of Cu(OH)2 nanowires, Cu3(PO4)2 nanosheets, and Cu4(OH)6Cl2 nanoparticles were confirmed by transmission and scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The minimum bactericidal concentrations (MBCs) of the three nanoparticles were 1.56 μg/mL, which exceeded that of the commercial agent thiodiazole copper (MBC > 100 μg/mL). The imaging results indicate that the nanoparticles could interact with bacterial surfaces and kill bacteria by inducing reactive oxygen species’ accumulation and disrupting cell walls. The protective activities of Cu(OH)2 nanowires and Cu3(PO4)2 nanosheets were 59.8% and 63.2%, respectively, similar to thiodiazole copper (64.4%) and better than the Cu4(OH)6Cl2 nanoparticles (40.2%). The therapeutic activity of Cu4(OH)6Cl2 nanoparticles (67.1%) bested that of Cu(OH)2 nanowires (43.9%), Cu3(PO4)2 nanosheets (56.1%), and thiodiazole copper (53.7%). Their therapeutic and protective activities for control of kiwifruit bacterial canker differed in vivo, which was related to their sizes and morphologies. This study suggests these copper-based nanoparticles as alternatives to conventional bactericides for controlling kiwifruit diseases.

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Nano-enabled pesticides for sustainable agriculture and global food security

Cited by 296 publications

References 99 publications

Microencapsulation of High‐Content Actives Using Biodegradable Silk Materials

Microencapsulation of High‐Content Actives Using Biodegradable Silk Materials

Preparation of an Environmentally Friendly Nano-Insecticide through Encapsulation in Polymeric Liposomes and Its Insecticidal Activities against the Fall Armyworm, Spodoptera frugiperda

Evaluation of the Abilities of Three Kinds of Copper-Based Nanoparticles to Control Kiwifruit Bacterial Canker

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