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A pH-responsive MOF-functionalized hollow mesoporous silica controlled herbicide delivery system exhibits enhanced activity against ACCase-herbicide-resistant weeds

文献类型： 外文期刊

作者： Deng, Xi-le 2 ; Li, Jia-qing 3 ; Yi, Ji-ming 4 ; Lian, Ren-jie 3 ; Zhang, Zhao-yang 3 ; Li, Jian-hong 3 ; He, Shun 1 ; Bai, Lian-yang 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Ctr Crop Nanobiotechnol, 1 Shizishan St, Wuhan 430074, Peoples R China

2.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Key Lab Biol & Control Weeds, Changsha, Peoples R China

3.Huazhong Agr Univ, Coll Plant Sci & Technol, Ctr Crop Nanobiotechnol, Wuhan, Peoples R China

4.Hunan Agr Univ, Coll Plant Protect, Changsha, Peoples R China

关键词： metal organic framework; controlled-release; hollow mesoporous silica; herbicidal activity; rice security; oxidative damage

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）

ISSN： 1526-498X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： BACKGROUND: Weeds grow aggressively in agricultural fields, leading to reduced crop yields and an inability to meet the growing demand for food. Herbicides are currently the most effective method for weed control. However, the overuse of herbicides has resulted in the evolution of resistance mutants and has caused environmental pollution. Therefore, new technologies are urgently required to address this global challenge. RESULTS: We report a copper-benzene-1,4-dicarboxylate metal organic framework (Cu-BDC MOF)-functionalized carboxyl hollow mesoporous silica (HMS-COOH) delivery system for the pH-controlled release of the acetyl-CoA carboxylase (ACCase)-inhibiting herbicide quizalofop-p-ethyl (QE). The delivery system (QE@HMS@Cu-BDC) enabled the efficient control of barnyard grasses that are susceptible and resistant to ACCase-inhibiting herbicides, which showed 93.33% and 88.33% FW control efficacy at 67.5 g ha(-1), respectively. With the lowest pH value (3), QE and copper ion were released slowly to total 70.30% and 78.55% levels (respectively) from QE@HMS@Cu-BDC after 89 h. QE@HMS@Cu-BDC showed better absorption, conduction, transportation and ACCase activity inhibition performance than that of QE emulsifiable concentrate (EC) in both susceptible and ACCase-herbicide resistant barnyard grasses. In addition, with the safener effect of carrier HMS@Cu-BDC and the aid of the safener fenchlorazole-ethyl (FE), the application of QE@HMS@Cu-BDC was shown to mitigate the damage caused by QE to rice plants. CONCLUSION: This work found that the new material HMS-COOH@Cu-BDC can be used to mitigate herbicide-induced oxidative stress and improve rice plant safety. Futhermore, the QE@HMS-COOH@Cu-BDC constructed in this research might be used as an efficient nanopesticide formulation for weed controls in paddy rice fields. (c) 2023 Society of Chemical Industry.

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