Development of functionalized abamectin poly(lactic acid) nanoparticles with regulatable adhesion to enhance foliar retention

Abstract

Functionalized abamectin poly(lactic acid) nanoparticles with different adhesion abilities to crop foliage can regulate folia retention of abamectin.

A Facile Approach to Increasing the Foliage Retention of Pesticides Based on Coating with a Tannic Acid/Fe3+ Complex

“…Polyphenols have exhibited good resistance to UV radiation and to photothermal effects [46], and, for these reasons, are typically used as sunscreens in various cosmetics. Prior work has also demonstrated that the encapsulation of Av is an effective way to improve photostability [15,47]. In the present work, the formation of TA/Fe 3+ films on the Av particles was predicted to partly shield these granules from UV light, and this is confirmed by the photodegradation results presented in Figure 4.…”

“…In detail, firstly, the lettuce foliage was cut into 8 mm diameter circles, secondly, the circles were put into different concentration solutions for 10 s; after drying the circles under the room temperature, finally, the target species were put onto the leaf. After 3 days, the activity of the creature was observed [15].…”

“…The retention of these pesticides on cucumber and lettuce leaves was determined based on HPLC analyses using a previously described method [15]. In each case, 2 mL of one of the four sample solutions was uniformly sprayed on the leaves, after which the leaves were transferred to a dark room.…”

“…According to many studies, off-target application, run off, and leaching during the traditional spray-based application of pesticides cause nearly 70% of the compounds to be unused, meaning that they enter air, soil, and aquatic ecosystems where they may undergo bioconcentration and ultimately threaten human health [11,12]. The weak adhesion of pesticides to crop leaves is the main reason for the waste associated with the spraying of pesticides [13][14][15]. Therefore, enhancing this adhesion along with reduction of loss, such as rolling down, leaching and bounce off, could increase the effective utilization efficiency of pesticides while positively contributing to the maintenance of various ecosystems.…”

Dual-Functionalized Pesticide Nanocapsule Delivery System with Improved Spreading Behavior and Enhanced Bioactivity

“…When stored at 0 • C and 25 • C, the MPS and PDI of the nanocapsule suspensions remained relatively stable, implying that the dual-functionalized pesticide nanocapsules had the desired physical stability. However, storage at 54 • C accelerated the process of the dual-functionalized pesticide nanocapsules approaching the glass transition temperature of PLA, which caused PLA to change from a rigid state to a flexible state [54,55], resulting in a reduction in particle size. However, the pesticide samples are not expected to experience such high temperatures under normal circumstances, so the prepared nanocapsules are still regarded as having good storage stability.…”