Abstract:
:Combined application of plant essential oils (EOs) with known antimicrobial effects and silica nanocapsules with high loading capacity and protection capability of the EOs make them proper candidates for creating environmentally friendly fungicides. In this study, EOs of the Lemongrass (LGO) and Clove (CO) were used against Gaeumannomyces graminis var. tritici (Ggt), a causal agent of take-all disease of wheat. To provide controlled delivery of the EOs, they were encapsulated into mesoporous silica nanoparticles (MSNPs) and then compared to the effects of pure EOs both in- vitro and in- vivo. MSNPs were synthesized via the sol-gel process. Various techniques such as Fourier transform infrared spectroscopy (FTIR), the Brunauer-Emmett-Teller (BET), thermogravimetric analysis (TGA), and UV-Vis spectroscopy were used to evaluate the successful loading of the EOs into the pore of MSNPs. The encapsulation efficiency (EE) was calculated as high as 84.24% for LGO and 80.69% for CO, while loading efficiency (LE) was determined 36% and 29% for LGO and CO, respectively. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) displayed spherical shapes and porous structures with average diameters of 50-70 nm. Recognition of the main components of the EOs via gas chromatographic-mass spectrometry (GC-MS) before and after the EO loading, detected eugenol and citral as the most frequent compounds in LGO and CO, respectively. For antifungal test in- vitro, selected concentrations of the pure EOs, EOs loaded in MSNPs (EOs- MSNPs) and Mancozeb ® fungicide based on pre-tests were mixed using potato dextrose agar (PDA). The inhibition percentage (IP) of fungal growth at each concentration, as well as minimum inhibition concentration (MIC) and minimum fungicidal concentrations (MFC) were obtained. The results indicated that antifungal effects in the encapsulated form increased by up to three times. In- vivo, the sterile wheat seeds were treated with pure EOs, EOs-MSNPs, and mancozeb at MFC concentration. Also, in order to keep on the EOs-MSNPs around the seeds, sodium alginate was used. The consequences of in- vivo experiments indicated that rate of disease control in presence of EOs-MSNPs and mancozeb was the same (~70%) and higher than pure EOs (LGO: 57.44%, CO: 49%). Also, improving the growth parameters in wheat plant, the covering of the EOs-MSNPs in alginate, had better control (84%) than that of EOs-MSNPs alone. Further, the release kinetics studies showed a gradual release of LGO and CO from MSNPs for four weeks in water and for five weeks in the soil-plant system. To the best of our knowledge, this is the first report of the control effect of LGO, CO, and their nanocapsule in MSNPs against the take-all disease of wheat. These results showed that the EOs-MSNPs can be a safe product for the efficient control of take-all disease in wheat crop.
journal_name
Pestic Biochem Physioljournal_title
Pesticide biochemistry and physiologyauthors
Sattary M,Amini J,Hallaj Rdoi
10.1016/j.pestbp.2020.104696subject
Has Abstractpub_date
2020-11-01 00:00:00pages
104696eissn
0048-3575issn
1095-9939pii
S0048-3575(20)30191-7journal_volume
170pub_type
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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更新日期:2020-02-01 00:00:00
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
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doi:10.1016/j.pestbp.2018.04.004
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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abstract::There has been a considerable growth in interest to use RNA interference (RNAi) as a novel insect pest management strategy in the past 10 years. However, there has been virtually no information on insect population variations in response to double-stranded RNA (dsRNA) molecules. The objective of this study was to gene...
journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
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journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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更新日期:2021-01-01 00:00:00
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journal_title:Pesticide biochemistry and physiology
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abstract::Herbicide efficacy depends on herbicides crossing cell and organelle membranes. We evaluated an artificial membrane system to understand how herbicides cross biological membranes. This understanding aids in predicting herbicide behavior in planta and, consequently, efficacy, mode of action, and whether active transpor...
journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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abstract::JS399-19 (2-cyano-3-amino-3-phenylancryic acetate), a novel cyanoacrylate fungicide, has powerful inhibition against Fusarium species, especially to Fusarium graminearum. Treated with JS399-19, mycelium of F. graminearum was distorted and swelled. The embranchment increased. In order to investigate the effect of JS399...
journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
doi:10.1016/j.pestbp.2013.05.009
更新日期:2013-09-01 00:00:00
abstract::Cantharidin (CTD) is a natural toxin with effective toxicity to lepidopteran pests. Nevertheless, little information is available on whether pests develop resistance to CTD. After being exposed to CTD (50 mg/L to 90 mg/L) or 10 generations, the resistance ratio of laboratory selected cantharidin-resistant Mythimna sep...
journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
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更新日期:2021-02-01 00:00:00
abstract::Insecticide resistance is a long standing and expanding problem for pest arthropod control. Effective insecticide resistance management (IRM) is essential if the utility of current and future insecticides is to be preserved. Established in 1984, the Insecticide Resistance Action Committee (IRAC) is an international as...
journal_title:Pesticide biochemistry and physiology
pub_type: 杂志文章
doi:10.1016/j.pestbp.2014.11.014
更新日期:2015-06-01 00:00:00