Formulation of botanicals for the control of plant-pathogens: A review

Borges, Darlan Ferreira; Lopes, E. A.; Moraes, Allan Robledo Fialho e; Soares, Márcio Santos; Visôtto, Liliane Evangelista; Oliveira, Cassiano Rodrigues de; Valente, Vânia Maria Moreira

doi:10.1016/j.cropro.2018.04.003

Cited by 78 publications

(45 citation statements)

References 63 publications

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“…Numerous botanochemical formulations have been developed with good plant defense mechanisms against pest attack 12,13 . Most commonly used botanical formulations are based on plant essential oils, plant extracts, or secondarymetabolites of plants 14,12,15 . Among botanical pesticides, neem has been the most effective botanical since last 30 years 16 .…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Bioengineering of Neem Colloidal Nano-Emulsion Formulation With Adjuvant for Better Surface Adhesion and Long Term Activity in Insect Control

Iqbal

Hazra

Purkait

et al. 2020

Preprint

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Although safe and eco-friendly botanical pesticides have been intensively promoted to combat pest attacks in agriculture, but their stability and activities remain an issue for their wide acceptability as sustained and effective approaches. The purpose of this work was to develop stable neem oil based nano-emulsion (NE) formulation with enhanced activity employing suitable bio-inspired adjuvant. So, Neem NEs (with and without) natural adjuvant (lemongrass oil and Prosopis juliflora) were prepared and different parameters dictating kinetic stability, acidity/alkalinity, viscosity, droplet size, zeta potential, surface tension, stability and compatibility were monitored using Viscometer, Zetasizer, Surface Tensiometer, High Performance Liquid Chromatography (HPLC) and Fourier Transform Infrared Spectroscopy (FTIR). Nano-emulsion biosynthesis optimization studies suggested that slightly acidic (5.9-6.5) NE is kinetically stable with no phase separation; creaming or crystallization may be due to botanical adjuvant (lemongrass oil). Findings proved that Prosopis juliflora, acted as bio-polymeric adjuvant to stabilize NE by increasing Brownian motion and weakening the attractive forces with smaller droplets (25-50nm), low zeta potential (-30mV) and poly-dispersive index (<0.3). Botanical adjuvant based NE with optimum viscosity (98.8cPs) can give long term storage stability and improved adhesiveness and wetting with reduced surface tension and contact angle. FT-IR analysis assured azadirachtin’s stability and compatibility with adjuvant. With negligible degradation (1.42%) and higher half-life (t1/2) of 492.95 days, natural adjuvant based NE is substantially stable formulation may be due to presence of glycosidic and phenolics compounds. Neem 20NE (with adjuvant) remarkably exhibited insecticidal activity (91.24%) against whitefly (Bemisia tabaci G.) in brinjal (Solanum melongena) as evidenced by in-vivo assay. Results thus obtained suggest, this bio-pesticide formulation may be used as safer alternative to chemical pesticides to minimize pesticide residue problems and natural adjuvant as key input in stability and efficacy enhancement of pesticides for crop protection in organic agriculture and Integrated Pest Management also.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Bioengineering of Neem Colloidal Nano-Emulsion Formulation With Adjuvant for Better Surface Adhesion and Long Term Activity in Insect Control

Iqbal

Hazra

Purkait

et al. 2020

Preprint

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“…Additional management strategies should be adopted to reduce the initial nematode population in highly infested areas, such as crop rotation, use of antagonistic plants, physical, chemical and biological control (FERRAZ et al, 2010). The use of formulations with higher concentration of essential oils, especially those that allow the slow release of the active compounds, can increase the efficiency of this management strategy (NTALLI; CABONI, 2012;BORGES et al, 2018). Some of the tested compounds in this work demonstrated efficiency for handling under laboratory conditions, thus formulations that ensure the best performance of these compounds under field conditions may be the output to make feasible the use of some essential oils with nematicidal potential under field conditions.…”

Section: Nematicidal Effect Of Essential Oils In the Fieldmentioning

confidence: 95%

Nematicidal potential of essential oils of Ageratum fastigiatum, Callistemon viminalis and Schinus terebinthifolius

Borges¹,

Lopes²,

Côrtes³

et al. 2018

Biosci. J.

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Some essential oils are rich in nematicidal compounds and can be used for the management of plant-parasitic nematodes. Laboratory and field studies aiming to evaluate the efficiency of this compounds are necessary. The objective of this research was to assess the nematicidal potential of essential oils from leaves of Ageratum fastigiatum and Callistemon viminalis, and green and mature fruits of Schinus terebinthifolius on the root-knot nematode Meloidogyne javanica. In laboratory, the essential oil of S. terebinthifolius green fruits reduced hatching by more than 80% and increased juvenile mortality by 300% when compared to Tween 20 + water. In the field, none of the essential oils controlled M. javanica in lettuce. In conclusion, the essential oil of S. terebinthifolius green fruits reduces the egg hatching and kills J 2 of M. javanica in laboratory. In an infested field with an average of 555 J 2 /100 cm 3 of soil, the application of the essential oils of S. terebinthifolius, C. viminalis and A. fastigiatum does not control M. javanica in lettuce.

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“…However, the high volatility of plant essential oils must be overcome to use them as 'push' components in field conditions. Various controlled release formulations of bioactive compounds derived from plants have been developed in fields such as medicine, pharmaceuticals, food technology and cosmetology [37], though this is only in the beginning stages in agriculture. To actualize ajowan oil's repellent activity in the field, the development of a suitable controlled release formulation is needed.…”

Section: Repellent Activities Of Apiaceae Plant Essential Oilsmentioning

confidence: 99%

Behavioral and Electrophysiological Effects of Ajowan (Trachyspermum ammi Sprague) (Apiales: Apiaceae) Essential Oil and Its Constituents on Nymphal and Adult Bean Bugs, Riptortus clavatus (Thunberg) (Hemiptera: Alydidae)

Lee

Seo

Huh

et al. 2020

Insects

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We investigated the repellent effect of 12 Apiaceae plant essential oils on nymphal and adult (male and female) forms of the bean bug, Riptortus clavatus (Thunberg) (Hemiptera: Alydidae), using a four-arm olfactometer. Among the essential oils tested, ajowan (Trachyspermum ammi Sprague) essential oil showed the strongest repellent activity against the nymphal and adult bean bugs. For female adults, the repellent activity was significantly different between an ajowan oil-treated chamber and an untreated chamber down to a concentration of 14.15 μg/cm2. We also investigated the repellent activity of individual ajowan essential oil constituents. Of the compounds examined, carvacrol and thymol showed the most potent repellent activity against the nymphal and adult bean bugs. Carvacrol and thymol exhibited 73.08% and 70.0% repellent activity for the bean bug nymph at 0.71 and 2.83 μg/cm2, respectively, and 82.6% and 80.7% at 5.66 and 11.32 μg/cm2, respectively, for male adults. Carvacrol and thymol exhibited strong repellent activity against female adult bean bugs down to a concentration of 2.83 μg/cm2. Ajowan essential oil, thymol and carvacrol elicited a negative electroantennogram (EAG) response from adult bean bugs. This could explain the repellent activity of ajowan essential oil and its constituents. Our results indicate that ajowan essential oil and its constituents carvacrol and thymol can be potential candidates as the ‘push’ component in a ‘push-pull’ strategy for bean bug control.

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Formulation of botanicals for the control of plant-pathogens: A review

Cited by 78 publications

References 63 publications

WITHDRAWN: Bioengineering of Neem Colloidal Nano-Emulsion Formulation With Adjuvant for Better Surface Adhesion and Long Term Activity in Insect Control

WITHDRAWN: Bioengineering of Neem Colloidal Nano-Emulsion Formulation With Adjuvant for Better Surface Adhesion and Long Term Activity in Insect Control

Nematicidal potential of essential oils of Ageratum fastigiatum, Callistemon viminalis and Schinus terebinthifolius

Behavioral and Electrophysiological Effects of Ajowan (Trachyspermum ammi Sprague) (Apiales: Apiaceae) Essential Oil and Its Constituents on Nymphal and Adult Bean Bugs, Riptortus clavatus (Thunberg) (Hemiptera: Alydidae)

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