Simple, Effective, and Energy-Efficient Strategy to Construct a Stable Pesticide Nanodispersion

Abstract

Nanopesticides have great impetus for enhancing the efficacy and safety of pesticides. Developing a simple and effective preparation method and controlling nanoparticle size growth during nanopesticides storage are still great challenges. In this paper, a new strategy was adopted to successfully construct nanodispersions. That is, pesticide was stored as soluble concentrate (SL), and the nanodispersion was formed by diluting with water when use. As an example, bifenazate-spirodiclofen (BS) complex SL was prepared and stable at 0 ± 2 and 54 °C ± 2 °C during 14-day storage. The mean particle size of the BS nanodispersion was less than 220 nm after standing for 24 h. The wettability and acaricidal activity of the BS nanodispersion were better than that of commercial SC. The universality of the strategy was also validated by bifenazate, spirodiclofen, abamectin, and difenoconazole. The strategy to construct a stable pesticide nanodispersion is simple, effective, and energy-efficient, which will promote the development of nanopesticides.

Encapsulated allyl isothiocyanate improves soil distribution, efficacy against soil‐borne pathogens and tomato yield

“…Determination of the stability of GR in storage followed methods previously described. 22,23 The AITC granules were packed into 100-mL Duran® wide-neck glass flasks (Schott AG, Mainz, Germany) and each was sealed with a butyl rubber stopper coated with petroleum jelly. The flasks were stored at 0 ± 2, 25 ± 2 and 54 ± 2 °C for 14 days.…”

Bacteria-Premised Nanobiopesticides for the Management of Phytopathogens and Pests

“…The large surface area offered by NBPs increases the affinity to the target species/groups and reduces the amount of biopesticide required for pest/pathogen control . Similarly, recent studies have focused on the implementation of nanotechnology to augment biopesticide efficacy and reduce losses owing to physical deterioration (such as volatilization and leaching). − …”

One‐pot construction of epoxy resin nanocarrier delivering abamectin and its efficacy on plant root‐knot nematodes

“…Currently, many studies on the storage stability of nanopesticides have only assessed the particle size change and decomposition rate of pesticides during storage, while the overall dynamic change in the formulations was rarely reported. 14,19,[32][33][34] Turbiscan Lab analyzes the mechanism and instability degree of the system by measuring the intensity of BS and T, and gives the relationship curve of the system with time (Fig. 3(c)).…”

“…The regulation of mechanical properties was difficult due to the high surface energy and large surface area of nanocarriers 11 . The particle size of nanopesticides stored as nanoparticles or nanoemulsions easily increased due to Ostwald ripening, and they were liable to aggregate and flocculate during long‐term storage 12–14 . Nanocarriers with core‐shell structures and mesoporous structures could reduce the direct contact between particles and avoid Ostwald ripening to a certain extent.…”

“…11 The particle size of nanopesticides stored as nanoparticles or nanoemulsions easily increased due to Ostwald ripening, and they were liable to aggregate and flocculate during long-term storage. [12][13][14] Nanocarriers with core-shell structures and mesoporous structures could reduce the direct contact between particles and avoid Ostwald ripening to a certain extent. However, most of the reported nanoparticles were stored after drying, such as the widely researched mesoporous silica and polylactic acid nanocarriers.…”