Layered Double Hydroxide Nanosheets Improve the Adhesion of Fungicides to Leaves and the Antifungal Performance

Abstract

Pesticides play an important role in plant protection and food security. Owing to the weak adhesion of pesticide particles to leaves, large amounts of pesticides are required, which cause water and soil pollution, making it harmful to human health. Hence, self-assembled layered double hydroxides (LDHs) in a formulation with azoxystrobin (an antifungal agent) were introduced. They were released slowly and adhered well to various foliage surfaces. The ordered azoxystrobin–LDH organic–inorganic composite showed an adhesion of ∼70% with leaves and sustained release. The adhesion mechanism and antifungal properties were investigated. The charge distribution in LDHs caused good dispersion of pesticide formulation in water. The hydroxyl groups on the layer surfaces of LDHs mediated interactions between the azoxystrobin and leaf surfaces through electrostatic interactions (with azoxystrobin) and hydrogen bonds (with leaf surfaces). This work helps us understand the role of nanomaterials in improving pesticide efficacy and provides insights into applying nanomaterials for agricultural protection.

Antifungal and antibacterial investigation of quinary Zr Al Fe Co Ni layered double hydroxide and its Al Fe Co Ni quaternary and Fe Co Ni tertiary roots

“… 39 Being bio-compatible materials that are non-toxic to living tissues, LDHs have biomedical uses, including eradicating pathogenic microbes. 1 In this study, Fe Co Ni, Al Fe Co Ni, and Zr Al Fe Co Ni had different levels of in vitro antibacterial activity against all of the investigated microbes, and in some cases, they were stronger than the reference antibiotics. Among the three LDHs, Zr Al Fe Co Ni displayed substantial antibacterial activities against the bacterial species tested, as evidenced by the lowest MIC and MBC reported in the current study.…”

“…LDHs and hydrotalcite-like materials, which are anionic clays, are a category of inorganic nanosheets with structurally positively charged layers and interlayer balancing anions. 1,2 LDHs have a wide range of applications in polymer and magnetic materials industries, catalysis, biomedical and agricultural applications, and environmental remediation. LDHs are characterized by relatively high specic surface area resulting from the layered structure, the nanometric particle size, and the excellent biocompatibility and biodegradability.…”

The Promising Nanovectors for Gene Delivery in Plant Genome Engineering

“…Traditionally, cuticular and stomatal uptake have been considered to be the two main pathways of nanomaterial entry into foliar and cells [ 55 ]. The specific micro/nanostructures on leaf surfaces in different plant species affect the entry of nanomaterials into leaves [ 56 ]. Particle size is the primary factor limiting the entry of nanoparticles into plants.…”

Europium-doped layered double hydroxide with spectral conversion property for enhanced photosynthesis

“…12 The hydrogen bonds between the surface groups of the plant leaves such as carboxyl and hydroxyl groups and LDH enhance the foliar adhesion rate and reduce the loss of active ingredients. 13 Therefore, the construction of LDH with foliar adhesion and elaborate electronic structure represents a promising strategy to promote efficient and lasting photosynthesis by spectral conversion. In this work, the europium-doped layered double hydroxide (Eu-LDH) architecture was designed using a coprecipitation method.…”