Long-lasting repellent activities of eco-friendly polyurethane system for controlled citral against melon fly

Zheng, Feng; Li, Tiantian; Xu, Hanhong; Hu, Pengtong; Wang, Ruifei; Zhang, Zhixiang

doi:10.1016/j.cropro.2021.105745

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…In summary, the pH-responsive essential oil delivery system reported in this study can make a rapid feedback response to a stimulus signal (infection of pathogenic fungi), and quickly release the essential oil when it encounters its target with enhanced stability and inhibition. Compared with previous research results, − this delivery system not only improves the stability and efficacy of essential oil but also realizes the precise delivery of essential oil, which greatly improves the applicability of plant essential oil. This delivery system also provides a new strategy for sustainable plant disease management and precision farming.…”

Section: Resultsmentioning

confidence: 82%

A pH-Responsive Essential Oil Delivery System Based on Metal–organic Framework (ZIF-8) for Preventing Fungal Disease

Ding,

Yuan,

et al. 2023

J. Agric. Food Chem.

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Smart metal–organic framework nanocarriers that respond to microenvironmental stimuli related to plant diseases can achieve the on-demand release of active ingredients to control diseases. The plant essential oil citral (CT) has significant biological activity against most pathogens but its poor stability limits its application in the field. To improve the applicability of plant essential oils, we aimed to construct a pH responsive essential oil delivery system (CT@ZIF-8) based on the zeolitic imidazolate framework-8 in this study. The high specific surface area of ZIF-8 enables CT@ZIF-8 remarkable loading capacity, and the metal–organic framework effectively delays the volatilization of CT. The results showed that CT@ZIF-8 was approximately 177 nm in size, had a stable nanostructure, and displayed a high pesticide loading efficiency (15.22%). The photodegradation rate of CT loaded in ZIF-8 under UV irradiation (48 h) was only 17.99%, much lower than that of CT alone (51.18%). The CT@ZIF-8 had a pH-responsive controlled release property, releasing CT from CT@ZIF-8 in a pH-dependent manner. The bioactivity results showed that CT@ZIF-8 had a lower EC50 than CT against three fungi (Magnaporthe oryzae, Botryosphaeria dothidea, and Fusarium oxysporum), enhancing the antifungal activity of CT. After 3 d of reagent treatment, only CT@ZIF-8 maintained good control against rice blast (75.76%) and soft rot (63.69%) infection. We have constructed a smart delivery system for essential oils, which provides a new pathway for the efficient application of plant-derived essential oils in the green control of plant diseases.

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Section: Resultsmentioning

confidence: 82%

A pH-Responsive Essential Oil Delivery System Based on Metal–organic Framework (ZIF-8) for Preventing Fungal Disease

Ding,

Yuan,

et al. 2023

J. Agric. Food Chem.

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“…One of most widely recognized effects shown by plant essential oils is a repellency activity on insect pests, and this could cause a significant reduction of the target pest populations on plants. Citral, one typical kind of plant secondary metabolite and a major compound of essential oils (EOs), also exhibits repellent effects on some insect pests [ 29 ], such as Aedes aegyptis [ 12 ], Aedes albopictus [ 13 , 30 ], Rhopalosiphum padi [ 31 ], Megalurothrips sjostedti [ 32 ], and Bactrocera cucurbitae [ 33 ]. In the present study, GC film, which incorporated the bioactive essential oil citral, showed a repellency effect against BPH, as determined by the 60.00% repellency recorded.…”

Section: Discussionmentioning

confidence: 99%

Repellency Mechanism of Natural Guar Gum-Based Film Incorporated with Citral against Brown Planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

Gao

et al. 2022

IJMS

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Using of plant essential oil that coevolved as a defense mechanism against agriculture insects is an alternative means of controlling many insect pests. In order to repel brown planthoppers (BPHs), the most notorious rice insect pest, a new film based on guar gum incorporated with citral (GC film) was formulated, which was effective while being environmentally friendly. In this paper, the effect and mechanism of GC film repellency against BPHs were determined. Repellent activity test and olfactory reaction analysis showed that GC film had repellency effect against BPHs, with repellency of 60.00% and 73.93%, respectively. The result of olfactory reaction indicated that GC film repellency against BPHs relied on smell. EPG analysis showed the proportion and mean duration of np waveform were significantly higher than in CK and increased following the treatment concentration, which indicated that GC film affected the recognition of BPHs to rice. Further analysis by RNA sequencing analysis showed a total of 679 genes were significantly upregulated and 284 genes were significantly downregulated in the BPHs fed on the rice sprayed with GC film compared to control. Odorant-binding protein (OBP) gene 797 and gustatory receptor gene (GR)/odorant receptor (OR) gene 13110 showed a significant decrease in differential expression and significant increase in differential expression, respectively. There were 0.66 and 2.55 differential expression multiples between treated BPHs and control, respectively. According to the results described above, we reasoned that GC film repellency against BPHs due to smell, by release of citral, caused the recognition difficulties for BPHs to rice, and OBP gene 797 and GR/OR gene 13110 appeared to be the crucial candidate genes for GC film repellency against BPHs. The present study depicted a clear and consistent repellency effect for GC film against BPHs and preliminarily clarified the mechanism of GC film as a repellent against BPHs, which might offer an alternative approach for control of BPHs in the near future. Our results could also help in the development and improvement of GC films.

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Long-lasting repellent activities of eco-friendly polyurethane system for controlled citral against melon fly

Cited by 2 publications

References 33 publications

A pH-Responsive Essential Oil Delivery System Based on Metal–organic Framework (ZIF-8) for Preventing Fungal Disease

A pH-Responsive Essential Oil Delivery System Based on Metal–organic Framework (ZIF-8) for Preventing Fungal Disease

Repellency Mechanism of Natural Guar Gum-Based Film Incorporated with Citral against Brown Planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

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