Tannic acid-based nanopesticides coating with highly improved foliage adhesion to enhance foliar retention

Abstract

Poor utilization of conventional pesticides has resulted in overuse, which increases cost, toxicity to other non-target organisms, concerns about human health and safety, groundwater and contamination, with ecosystem destruction and food pollution.

Biocidal activity of polylactic acid-based nano-formulated abamectin on Acyrthosiphon pisum (Hemiptera: Aphididae) and the aphid predator Adalia bipunctata (Coleoptera: Coccinellidae)

“…The recorded LC 50 for peach aphid Myzus persicae Sulzer (Hemiptera: Aphididae) were 1.5 mg/L [41], and that was 5.5 mg/L for Anjum et al's bioassay [42]. But results of our study could get support from our recent bioassay on M. persicae (LC 50 of 17.38 mg/L and 10.68 mg/L for Abam-PLA-NS and Abam-PLA-Tanning-NS respctively) [32].…”

“…PLA-based nano-formulated abamectin was synthesized according to a previously reported emulsion solvent evaporation method (O/W) [32]. PLA (40 mg/mL) and abamectin (40 mg/ mL) were dissolved in CH 2 Cl 2 by magnetic stirring to form an organic phase.…”

“…For the commercial formulation, free abamectin on the surface of insects and Petri dishes were rapidly degraded, thereby reducing exposure to toxic residues. Nanoformualtions could enhance the stability of the pesticide and inhibit the degradation of abamectin [32,45], then, improved the toxicity to ladybeetles. While the oral exposure results showed totally opposite trends.…”

Nanometerization of thiamethoxam by a cationic star polymer nanocarrier efficiently enhances the contact and plant‐uptake dependent stomach toxicity against green peach aphids

“…The surface of the nanopesticide could be modified by affinity groups to improve folia adhesion, and the retention rate of the prepared nanopesticide was enhanced by > 50%. 56 Whether SPc can be applied as a common adjuvant is an interesting question. Our previous study confirmed that addition of SPc could improve not only the contact toxicity of matrine against green peach aphids in the laboratory, but also the control efficacy and persistence of matrine, D-limonene and pyrethrin against western flower thrips in the greenhouse.…”

“…applied polyethylene glycol‐coated nanoparticles to garlic essential oil to control adult Tribolium castaneum , and the control efficacy increased to over 80% after 5 months due to the slow and persistent release of AIs. The surface of the nanopesticide could be modified by affinity groups to improve folia adhesion, and the retention rate of the prepared nanopesticide was enhanced by > 50% 56 …”