Summary
This study evaluated the use of a cationic star polymer (SPc) as a nanocarrier to improve the bioavailability and efficacy of thiamethoxam, a neonicotinoid insecticide. Nanometre-scale complexation of thiamethoxam with SPc substantially increased plant uptake and demonstrated enhanced toxicity against green peach aphids, suggesting potential for reducing conventional insecticide application rates and associated environmental pollution in crop protection.
UK applicability
The findings may be relevant to UK horticulture, particularly soft fruit and vegetable production where green peach aphid management is important. However, practical adoption would depend on regulatory approval of the nanoformulation under UK and EU pesticide legislation, and field-scale validation under temperate growing conditions.
Key measures
Particle size reduction (575.77 nm to 116.16 nm); plant uptake efficiency ratio; contact and stomach toxicity against green peach aphids (Myzus persicae)
Outcomes reported
The study measured plant uptake efficiency and toxicity of nano-formulated thiamethoxam against green peach aphids. It reported a 1.69–1.84-fold increase in plant uptake of thiamethoxam when complexed with a star polycation carrier compared to conventional thiamethoxam.
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