嵌入温度响应型农药微胶囊的新型可生物降解复合地膜可持久控制大豆疫霉根腐病,ACS Sustainable Chemistry & Engineering

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嵌入温度响应型农药微胶囊的新型可生物降解复合地膜可持久控制大豆疫霉根腐病
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-06-16 , DOI: 10.1021/acssuschemeng.3c02824
Zhengang Xie ₁ , Qiuyu Xiong ₁ , Yun Fang ₁ , Qi Zhang ₂ , Wenlong Liang ₁ , Jingli Cheng ₁ , Wenxuan Shang ₁ , Wei Zhao ₃ , Jinhao Zhao ₁

Affiliation

土传病害发病快、防治手段少，给农业生产造成了巨大的经济损失。本研究采用温度敏感相变材料作为胶囊芯，制备了具有温度响应型农药释放能力的吡唑醚菌酯（Pyr）微胶囊（Pyr@MCC）。然后，将Pyr@MCC与聚乙烯醇-淀粉薄膜（PVA/ST）有机结合，制备了根据外界温度变化智能控制农药释放速率的复合地膜（PM/PVA/ST），实现了大豆疫霉根腐病（PRR）的可持续高效防治。拉伸测试表明，PM/PVA/ST薄膜表现出良好的拉伸变形能力（134.9%）和高拉伸应力（18.0 Mpa）。₂ O、CO ₂和O ₂。释放测试数据证明，PM/PVA/ST薄膜在较低温度（15℃）下缓慢释放Pyr，在较高温度（35℃）下快速释放Pyr，对应于疫霉根腐病爆发的高温。体外抑菌及盆栽试验表明PM/PVA/ST膜对镰刀菌有良好的防效种。这些结果表明，负载在薄膜上的功能性农药微胶囊在防治大豆PRR方面具有良好的应用潜力。总体而言，该复合地膜为优化农药输送途径，从而有效控制土传病虫害，减少农药使用频率和用量，减少传统地膜的白色污染提供了一些创新的研究思路。

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Novel Biodegradable Composite Mulch Film Embedded with Temperature-Responsive Pesticide Microcapsules for Durable Control of Phytophthora Root Rot on Soybean

Soil-borne diseases have caused substantial economic losses to agricultural production due to their rapid onset and few means of control. Here, pyraclostrobin (Pyr) microcapsules (Pyr@MCC) with temperature-responsive pesticide release capability were prepared using temperature-sensitive phase-change materials as capsule cores. Then, the Pyr@MCC was organically combined with poly(vinyl alcohol)-starch film (PVA/ST) to prepare a composite mulch film (PM/PVA/ST) with intelligent control of pesticide release rate according to external temperature change, which realized sustainable and efficient control of Phytophthora root rot (PRR) on soybean. Tensile tests showed that the PM/PVA/ST film exhibited good tensile deformation ability (134.9%) and high tensile stress (18.0 Mpa). The water vapor transmission rate test showed that the PM/PVA/ST film exhibited good barrier performance to H₂O, CO₂, and O₂. The release test data proved that the PM/PVA/ST film could slowly release Pyr at lower temperatures (15 °C) and release Pyr rapidly at higher temperatures (35 °C), corresponding to the high temperature at which the Phytophthora root rot outbreak. In vitro antifungal and pot experiments showed that the PM/PVA/ST film had a good control efficiency on Fusarium spp. These results show that the functional pesticide microcapsules loaded onto the film have good application potential for controlling PRR on soybean. In general, this composite mulch film provided some innovative research ideas for optimizing the pesticide delivery pathway and thereby efficiently controlling soil-borne pests and diseases, reducing the frequency and amount of pesticide use and minimizing white pollution from traditional plastic mulch films.

更新日期：2023-06-16

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