Identification and Efforts to Control Infection Odontoglossum ringspot virus (ORSV) on Orchid

Mahfut, Mahfut

doi:10.52088/ijesty.v1i1.38

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…Biodegradability of this composite will be discuss somewhere else. This is in accordance with research conducted by Ningsing et all, 2012, added banana starch into the matrix polypropylene (PP) and get the value of the tensile strength of the optimum on the addition of the starch 2 grams, but on the addition of starch 3 grams the value of the tensile strength decreased [12]. Other study had also been carried out by Sudi, 2013, mechanical properties on composite matrix polystyrene material added with durian seed starch and obtain tensile strength values decreased on the addition of starch is above 5% [9].…”

Section: Tensile Strengthsupporting

confidence: 90%

Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

Dewi

Oktaviani

Ginting

et al. 2021

Int. J. Eng. Scie. and Inform. Technology.

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Environmentally friendly plastics can be degraded biologically in an anaerobic environment. This plastic is synthesized from starch such as sago starch which is available in abundance. In the form of bioplastics, its mechanical properties are still not compared to conventional plastics derived from crude oil, so its application is limited. The incorporation of filler material increases its mechanical properties, one of the selected fillers is hemp fiber as used in this study. Thermoplastic starch from sago with flax fiber as a filler and the addition of Polypropylene to improve mechanical properties with a certain composition to maintain its natural biodegradability. The mechanical properties analyzed were tensile strength, elongation and modulus of elasticity. Water absorption tests were also carried out to observe the water resistance properties. The results of the tensile strength test showed that the best tensile strength value of 9.32 Mpa was obtained at the addition of 35% fiber with a TPS: PP ratio of 1:1.5. The same conditions were obtained for the percent elongation with the results of 10.16% and the modulus of elasticity was 91.73 Mpa. Water absorption showed that 55% filler gave the lowest water absorption, namely 4.41% at a ratio of TPS: PP 1:0.5. The addition of fiber filler into the bio-composite affects the tensile strength, elongation and modulus of elasticity, the higher the volume of filler entering the bio-composite, the lower the value of tensile strength, elongation and modulus of elasticity, or vice versa. The ratio of addition of polypropylene matrix is also influential, the higher the ratio contributes to the tensile strength, elongation and higher modulus of elasticity. High water absorption capacity will reduce the performance of biocomposite, so the lower the water absorption ability, the better the quality of the biocomposite product and the wider its application

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Section: Tensile Strengthsupporting

confidence: 90%

Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

Dewi

Oktaviani

Ginting

et al. 2021

Int. J. Eng. Scie. and Inform. Technology.

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“…One of them is the Odontoglossum ringspot virus (ORSV) which is the type of virus that is reported to infect the most and has the widest spread in the world. A previous study (Mahfut, 2021) showed that several natural orchids show variations in symptoms of ORSV induction, namely mosaic, streak, chlorotic, necrotic, and wilting leaf.…”

Section: Introductionmentioning

confidence: 97%

“…The spread of ORSV infection is known to be able to inhibit plant growth and resistance and reduce its aesthetic value periodically (Koh et al, 2014in (Mahfut, 2021). Currently, efforts to control the disease are still using pesticides which cause pollution and environmental damage.…”

Section: Introductionmentioning

confidence: 99%

Induction of Rhizoctonia resistance to odontoglossum ringspot virus (ORSV) infection on orchid leaf organ viability

Tohari

Mahfut

Handayani³

et al. 2021

J. of Sustainability Sci. and Tech.

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Orchid plants are in great demand by the public as ornamental plants that have economic value and the beauty of attractive flower shapes and colors, especially Phalaenopsis and Dendrobium. Related to this, conservation efforts are needed through cultivation. However, these efforts are often hampered by viral infections. One of the viruses that trigger inhibition of orchid cultivation that often appears is ORSV. Control efforts that are relatively safe and efficient can utilize mycorrhizae in orchids which play a role in increasing the absorption of plant nutrients. The use of Phalaenopsis and Dendrobium with the induction of Rhizoctonia sp. against ORSV is a very important alternative biofertilizer and biocontrol agent. The objectives of this study were 1) to determine the effectiveness of orchids induced by Rhizoctonia resistance, 2) to determine the viability of orchid leaf organs to ORSV infection, 3) to determine the viability of orchid root organs resulting from Rhizoctonia resistance to ORSV infection. This study was conducted in January 2021 – March 2021 at the Botanical 2 Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Lampung. This study employed a completely randomized factorial with 6 treatments and 4 replications. The variable observed in this study was the effectiveness of mycorrhizae, leaf and root length, number of leaves and roots, and leaf width. The data obtained were homogenized using Levene's test and then analyzed by ANOVA and Tukey's further test at the 5% level. The results showed that the effectiveness of mycorrhizae occurred on the 3rd day of incubation. In leaf organs, Phalaenopsis amabilis showed an increased response and Dendrobium discolour showed a decreased response in leaf length, width, and number. Meanwhile, in the root organ, Dendrobium discolour showed an increased response and Phalaenopsis amabilis showed a decreased response in root length and number of roots.

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“…However, use alcohol continuously can cause dryness and irritation by eroding the surface of the skin, dissolving the layer of fat and sebum of the skin. In addition, alcohol also has flammable properties [10] [11]. Therefore, innovation of natural ingredients for hand sanitizer that is safer to the skin is required.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, mangrove Avicennia is a source of alcohol, amino acids, carbohydrates, fatty acids, hydrocarbons, minerals, phytoalexin, carboxylic acids, vitamins and glucoside [13]. Besides mangroves, Aceh is rich in patchouli plants, Pogostemin cablin Bench, which contains patchouli alcohol from patchouli oil [14] [11]. Patchouli alcohol is used as a fixative (binding agent) in the perfume industry and a component of cosmetic products.…”

Section: Introductionmentioning

confidence: 99%

Examination of Gel Hand Sanitizer from Mangrove Leaves and Patchouli Oil Against Sthapylococcus Aureus

Fahreni

Mardina

Indriaty

et al. 2021

Int. J. Eng. Scie. and Inform. Technology.

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The development of hand sanitizers from a combination of mangrove leaves and patchouli oil has not yet developed in the world and Indonesia, though these two natural ingredients have antibacterial activity as a substitute for alcohol. It is known that many alcohol-based hand sanitizers can cause burning, irritation, dry skin, and cannot be used on wound skin. The purpose of this study was to develop an innovative hand sanitizer in the form of a gel from a combination of mangrove leaves extract and patchouli oil from Aceh. The samples of mangroves (Avicennia) leaves and Patchouli oil were collected from the Kuala Langsa Mangrove Forest and patchouli farmers in South Aceh. Staphylococcous aereus bacteria were obtained from the Laboratory of Universitas Sumatera Utara. This study used a completely randomized design (CRD) with three replications for the gel formulation. The study prepared four formulations namely K (-) as control without mangrove extract and patchouli oil, F-I contained 1g mangrove extract and 10mL patchouli oil, F-II contained 5g mangrove extract and 20mL patchouli oil, and F-III contained 10g mangrove extract and 30mL patchouli oil. Gel hand sanitizer formulations were test for antibacterial active using diffusion method against S. aereus. The data were analyzed using one-way ANOVA. The results of the gel hand sanitizer formulation showed inhibitory effect against S. aereus with the diameter zones of 12.6 mm, 21.33 mm, 19.61 mm and 25 mm for negative control, F-I, F-II, and F-III. The F-III formulation was found as the maximum formula to inhibit the growth of S. aereus.

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Identification and Efforts to Control Infection Odontoglossum ringspot virus (ORSV) on Orchid

Cited by 5 publications

References 4 publications

Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

Induction of Rhizoctonia resistance to odontoglossum ringspot virus (ORSV) infection on orchid leaf organ viability

Examination of Gel Hand Sanitizer from Mangrove Leaves and Patchouli Oil Against Sthapylococcus Aureus

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