Back to Search Start Over

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

Authors :
Deng, Xi‐le
Li, Jia‐qing
Yi, Ji‐ming
Lian, Ren‐jie
Zhang, Zhao‐yang
Li, Jian‐hong
He, Shun
Bai, Lian‐yang
Source :
Pest Management Science; Dec2023, Vol. 79 Issue 12, p5237-5249, 13p
Publication Year :
2023

Abstract

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. © 2023 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1526498X
Volume :
79
Issue :
12
Database :
Complementary Index
Journal :
Pest Management Science
Publication Type :
Academic Journal
Accession number :
173625326
Full Text :
https://doi.org/10.1002/ps.7729