Preparation and characterization of emamectin benzoate nanoformulations based on colloidal delivery systems and use in controlling Plutella xylostella (L.) (Lepidoptera: Plutellidae)

Abstract

Colloidal delivery systems have been widely used as carriers for controlled delivery of pesticides to improve the efficacy and photostability of natural and semi-synthetic pesticides. In this study, we have synthesized emamectin benzoate nanoformulations (EB + NFs) depending on polymeric nanocapsules (PNC) and two types of the nanosilica, mesoporous nanosilica (MCM-48) and silicon dioxide nanoparticles (SNPs) as carriers for the emamectin benzoate (EB). The fabricated nanoformulations were characterized by using X-ray diffraction analysis, Fourier transform infrared spectroscopy, particle size, zeta potential, morphology, absolute recovery (AR), entrapment efficiency (EE), UV stability and release kinetics. The obtained results showed that the carriers had a remarkable loading ability for EB and improved the EB photostability. The EE% of nanoformulations were 92.84%, 87.45% and 71.19% for emamectin benzoate polymeric nanocapsules (EB + PNC), emamectin benzoate SNPs (EB + SNPs) and emamectin benzoate MCM-48 (EB + MCM-48) respectively. The insecticidal activity of EB + NFs against Plutella xylostella showed that the EB + SNPs was more effective than other EB + NFs and EB alone. The LC 50 values were 0.18, 4.03, 8.49 and 11.06 mg L À1 for EB + SNPs, EB + MCM-48, EB + PNC and EB respectively. The obtained results suggest the colloidal delivery systems that used in this study could improve the efficacy and photostability for EB, and they are able to overcome the disadvantage of the natural and semisynthetic pesticides such as environmental sensitivity and to increase the efficacy of pesticides, which eventually leads to reduce the dosage of pesticides needed, reducing the number of applications required in comparison to conventional formulations. a Different letter in column under same formulation followed aer mean (AESD) indicate signicant difference at P ¼ 0.05 level.This journal is

Synthesis and Technology of Nanoemulsion-Based Pesticide Formulation

“…Emamectin benzoate has been synthesized using polymeric nanocapsules (PNC) and two different nanosilica were used as the carrier. The study demonstrated that a maximum cumulative release of 51% was found in EB loaded with silicon dioxide nanoparticles (SNPs) [136]. This nanoformulations also protect some agrochemical compounds from photodegradation using the coating technique.…”

Synthesis, Characterization, and Pesticidal Activity of Emamectin Benzoate Nanoformulations against Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

“…Our results were in good agreement with Song et al [17], who found that the amount of chlorfenapyr-loaded on silica nanoparticles was 39.78% and that the chlorfenapyr might be physically adsorbed on the silica nanoparticles. Also, the SNPs illustrated a high loading ability for emamectin benzoate (87.5%) [18]. Consequently, these new nano-carriers such as CNCs and SNPs can be used to improve EMB insecticidal toxicity, solubility, and photodegradation and to overcome the disadvantages of EMB as mentioned earlier.…”

“…This is mainly because of their structural flexibility in forming nanomaterials of different sizes and shapes, low cost, large surface area, and non-toxicity and has also been approved by the U.S. Food and Drug Administration as a safe material [14,15,16]. Moreover, Silicon dioxide nanoparticles (SNPs) have been demonstrated to be capable of improving the dispersity, bioavailability, and efficiency of pesticide compounds and in overcoming the physiological resistance of pests [17,18].…”

PDA@Ti3C2Tx as a novel carrier for pesticide delivery and its application in plant protection: NIR‐responsive controlled release and sustained antipest activity

“…The surface chemical characteristics were studied by Fourier‐transform infrared (FTIR) spectrometry (Nicolet 6700, Thermo Fisher Scientific, Waltham, MA, USA). High‐performance liquid chromatography (HPLC) was measured (Agilent 1100, Agilent Technologies, Santa Clara, CA, USA), and the detection method followed the previous literature 37 …”

“…The injection volume was 20 μL with a flow rate of 1.0 mL min −1 , and the oven temperature was maintained at 30 °C. The detection wavelength was 245 nm 37 …”