Bioinspired Development of P(St–MAA)–Avermectin Nanoparticles with High Affinity for Foliage To Enhance Folia Retention

Abstract

Pesticides are chemical or biological substances to control pests and protect the crop yield. Most pesticides suffering from large amounts of losses in the environment lead to damage of ecological systems and food pollution. To reduce their losses and increase the utilization rate, we have developed bioinspired mussel avermectin nanoparticles [P(St-MAA)-Av-Cat] with strong adhesion to crop foliage by the emulsion-solvent evaporation method and chemical modification. They were near spheres with a diameter of around 120 nm. They displayed remarkable high avermectin content of more than 50% (w/w) and presented excellent storage stability as well as continuous sustained release. The photosensitive avermectins loaded were highly improved against ultraviolet light. Meanwhile, the retention rate of P(St-MAA)-Av-Cat on the crop foliage surfaces was significantly increased. As a result, the indoor toxicity of P(St-MAA)-Av-Cat was highly enhanced. The adhesive property strongly depended upon the functional groups on the nanoparticle surface. The multimodal binding mode of P(St-MAA)-Av-Cat to the crop foliage surface resulted in stronger adhesion and a longer retention time.

Environmental fate of nanopesticides: durability, sorption and photodegradation of nanoformulated clothianidin

“…Nanoformulations discussed so far in the literature could either slow down 28 – 31 or catalyse 32 the photodegradation of the associated AI. The DT 50 of clothianidin generally followed the order AI < Com < NFB < NFA < NFC.…”

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

“…[28][29][30][31] Polydopamine nanoparticles encapsulating pesticide exhibited excellent adhesive performance on crop foliage, and enhanced pesticide retention time. 22,32 Given the high cost of dopamine, it is not practical for application as a pesticide carrier. Tannic acid (TA) is a natural polyphenol with low cost that can be extracted from various plants.…”

Antagonistic Effect of Azoxystrobin Poly (Lactic Acid) Microspheres with Controllable Particle Size on Colletotrichum higginsianum Sacc

“…The adhesion of pesticides on target crops played a vital role in enhancing their effective availability [ 56 , 57 , 58 ]. The static contact angles were determined to estimate the pesticide wettability on cucumber and cabbage leaves.…”