Typical Monoterpenes as Insecticides and Repellents against Stored Grain Pests

Reis, Suelen L; Mantello, Anieli G; Macedo, Jeferson M; Gelfuso, Erica Aparecida; Silva, Cássio P da; Fachin, Ana Lúcia; Cardoso, Alexandre Moraes; Beleboni, Renê Oliveira

doi:10.3390/molecules21030258

Cited by 61 publications

(36 citation statements)

References 19 publications

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“…The authors noted a significant increase in the acaricidal effects of the compound mixtures. Other studies have also described the repellent activity of botanical compounds . In a previous study, our research group also observed repellent effects of geraniol and R ‐citronellal compounds against T. urticae at the same concentration (5 mg mL −1 ) used in the present study.…”

Section: Resultssupporting

confidence: 80%

“…Geraniol is a compound derived from different essential oils (citronella and palmrose, among others) and is classified as an acyclic alcohol having a vapor pressure of 2.21 × 10 −2 mmHg at 25 °C, water solubility of 100 mg L −1 and boiling point at 230 °C. Several applications of geraniol are reported in the literature, including in the control of agricultural pests . Eugenol, the main component of clove essential oil, belongs to the chemical class of phenylpropanoids.…”

Section: Introductionmentioning

confidence: 99%

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Association of zein nanoparticles with botanical compounds for effective pest control systems

Oliveira

Campos

Germano-Costa

et al. 2019

Pest Management Science

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BACKGROUND: Botanical compounds from plant species are known to have pesticidal activity and have been used in integrated pest management programs. The varied spectrum of the pesticidal action of these compounds can also avoid selection of resistance in pest populations. In this study, mixtures of the botanical compounds geraniol, eugenol and cinnamaldehyde were encapsulated in zein nanoparticles to improve their stability and efficiency. Biological effects of the nano-scale formulations of the botanical compounds were evaluated against two agricultural pests: the two-spotted spider mite (Tetranychus urticae) and the soybean looper (Chrysodeixis includes).RESULTS: The formulations were stable over time (120 days) with a high encapsulation efficiency (>90%). Nanoencapsulation also provided protection against degradation of the compounds during storage and led to a decrease in toxicity to non-target organisms. The release of the compounds (especially eugenol and cinnamaldehyde) from the nanoparticles was directly influenced by temperature, and the main mechanism of release was through a diffusion-based process. Nanoencapsulated compounds also showed superior efficiency compared to the emulsified compounds in terms of repellency and insecticidal activity. CONCLUSION:The findings of this study indicate that the convergence of botanical compounds with nano-scale formulation has the potential to improve efficacy for their sustainable use in integrated pest management in agriculture.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Association of zein nanoparticles with botanical compounds for effective pest control systems

Oliveira

Campos

Germano-Costa

et al. 2019

Pest Management Science

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“…In addition to its great contribution to tea flavor, geraniol is also reported to be a defensive secondary metabolite in plant [49][50][51]. It has been demonstrated to be effective in repelling insects and apparently possessed insecticide properties [52,53]. Geraniol also showed well antipathogenic activity to both plant and insect pathogens [50,51].…”

Section: Discussionmentioning

confidence: 99%

Characterization of Terpene Synthase from Tea Green Leafhopper Being Involved in Formation of Geraniol in Tea (Camellia sinensis) Leaves and Potential Effect of Geraniol on Insect-Derived Endobacteria

2019

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When insects attack plants, insect-derived elicitors and mechanical damage induce the formation and emission of plant volatiles that have important ecological functions and flavor properties. These events have mainly been studied in model plants, rather than crop plants. Our study showed that tea green leafhopper (Empoasca (Matsumurasca) onukii Matsuda), a major pest infesting tea attack significantly induced the emission of geraniol from tea leaves, but did not affect the crude enzyme activity of geraniol synthase in tea leaves. An enzyme extract of E. (M.) onukii specifically produced geraniol from geraniol diphosphate. Furthermore, a terpene synthase (EoTPS) was isolated from E. (M.) onukii. This terpene synthase was able to convert geraniol diphosphate to geraniol in vitro. In addition, geraniol had in vitro ability to inhibit the growth of Acinetobacter johnsonii that is endobacterial isolated from E. (M.) onukii. This information illustrates that elicitors from piercing-sucking insects can induce the formation of volatiles from crop plants and advances our understanding of the roles of plant volatiles in the interaction among crops-insects-microorganisms.Biomolecules 2019, 9, 808 2 of 17 and shown to induce the formation and emission of plant volatiles. These elicitors have mainly been identified in chewing insects, and rarely in piercing-sucking insects. This may be because the amount of elicitors produced by small piercing-sucking insects is insufficient for analysis and difficult to obtain [2]. In addition, the first events in the interaction between insects and plants have mainly been studied in model plants, rather than horticultural crop plants.Tea (Camellia sinensis) is an important horticultural crop in almost 30 countries, including China, Japan, India, and Kenya. Abundant volatiles compounds such as fatty acid-derivatives including (Z)-3-hexen-1-ol, (Z)-3-hexenyl acetate, (E)-2-hexenal, and (E)-2-hexenoic acid; volatile phenylpropanoids/benzenoids including benzyl nitrile, benzaldehyde, and indole; and volatile terpenes including geraniol, farnesene, ocimenes, linalool, and nerolidol were found in tea [5,[11][12][13]. These volatile compounds are important quality components of teas and contribute to tea flavor [14]. Among these volatiles, terpenes are major floral and honey flavor-related volatiles [14]. During tea plant growth, many pest insects such as tea green leafhoppers, tea geometrid, tea aphids, smaller tea tortrix, and Kanzawa spider mites attack tea leaves and affect the yield and quality of the crop [13]. In response to these insect attacks, tea plants emit numerous compounds. Insect-induced volatiles may play important roles in defense [11,12]. On the other hand, insect-induced volatiles may change the flavor the tea and increase the tea quality. As a classical example, a famous oolong tea (oriental beauty), which is manufactured from tea leaves infected with tea green leafhoppers, contains characteristic volatile monoterpenes and has a unique ripe fruit and honey aroma [5,15].In our ...

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“…Although the use of chemicals with stronger repellent properties might reduce the development of resistance among storage‐insect pests, the large diversity of storage‐insect pests could result in variations in the responses to the same chemical. Taking this into account, a large number of different essential oils and their components were tested for repellence against storage‐insect pests . In previous reports, anethol, estragole, and eugenol have been shown to have repellent action against S. zeamais, although anethole also showed some attractive activity at low concentrations .…”

Section: Resultsmentioning

confidence: 99%

“…Taking this into account, a large number of different essential oils and their components were tested for repellence against storage-insect pests. 16,[41][42][43][44] In previous reports, anethol, estragole, and eugenol have been shown to have repellent action against S. zeamais, although anethole also showed some attractive activity at low concentrations. 45,46 However, no critical study has been made of the structural differences occurring in phenylpropanoids or their relationship with repellent action, and this is important in order to contribute to the development of new green pesticides.…”

Section: Effects On Behavior Attraction/repellent Actionsmentioning

confidence: 99%

Cinnamaldehyde and related phenylpropanoids, natural repellents, and insecticides against Sitophilus zeamais (Motsch.). A chemical structure‐bioactivity relationship

et al. 2018

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Typical Monoterpenes as Insecticides and Repellents against Stored Grain Pests

Cited by 61 publications

References 19 publications

Association of zein nanoparticles with botanical compounds for effective pest control systems

Association of zein nanoparticles with botanical compounds for effective pest control systems

Characterization of Terpene Synthase from Tea Green Leafhopper Being Involved in Formation of Geraniol in Tea (Camellia sinensis) Leaves and Potential Effect of Geraniol on Insect-Derived Endobacteria

Cinnamaldehyde and related phenylpropanoids, natural repellents, and insecticides against Sitophilus zeamais (Motsch.). A chemical structure‐bioactivity relationship

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