Inhibitory allelopathic effects of Moringa oleifera Lamk plant extracts on wheat and Sinapis arvensis L.

2018 ◽  
Vol 44 (1) ◽  
pp. 53-66 ◽  
Author(s):  
N.A. Tahir ◽  
K.O. Qader ◽  
H.A. Azeez ◽  
J.S. Rashid
Keyword(s):  
Plant Extracts ◽  
Moringa Oleifera ◽  
Sinapis Arvensis ◽  
Allelopathic Effects

In vitro Allelopathic Effects of Plant Extracts on Germination of Vicia fabia (partim) Seeds

2019 ◽  
Author(s):  
S. Parafiniuk ◽  
E. Czerwiñska
Keyword(s):  
Zea Mays ◽  
Plant Species ◽  
Plant Extracts ◽  
Taraxacum Officinale ◽  
Urtica Dioica ◽  
Favourable Effect ◽  
Artemisia Vulgaris ◽  
Allelopathic Effects ◽  
Materials Used

The experiment evaluated the effect of plant extracts on germination and contamination of Vicia fabia seed “Bobas” variety of horse beans. The materials used for the studies were aqueous extracts made of 40 plant species. The studies aimed to indicate those plant species, which extracts limited their contamination, simultaneously having a stimulating impact on seeds germination. The germination capability of seeds stimulated extracts from green parts of Satureja hortensis, Zea mays stigmata, Verbascum thapsiforme flowers. The number of seeds colonised by microorganisms was limited by extracts from Zea mays stigmata, Taraxacum officinale roots, Urtica dioica leaves. The analysis of the germination capability of seeds and their contamination by germs showed that extracts prepared in the form of brew had the most favourable effect. All forms of extracts from green parts of Artemisia vulgaris,Taraxacum officinale roots,Urtica dioica leaves had the most favourable effect on germination of horse bean seeds and at the same time on limitation of their contamination.

scholarly journals Application of plant extracts and Trichoderma harzianum for the management of tomato seedling damping-off caused by Rhizoctonia solani

2020 ◽  
Vol 116 (11/12) ◽  
Author(s):  
Mapula T.P. Hlokwe ◽  
Mapotso Kena ◽  
David N. Mamphiswana
Keyword(s):  
Biological Control ◽  
Rhizoctonia Solani ◽  
Plant Extracts ◽  
Trichoderma Harzianum ◽  
Moringa Oleifera ◽  
Plant Diseases ◽  
Yield Reduction ◽  
Biotic Factors ◽  
Damping Off ◽  
Tomato Seedling

Seedling production under smallholder farming systems can be negatively affected by both abiotic and biotic factors. Seedling damping-off caused by Rhizoctonia solani is one of the major biotic factors which causes significant yield reduction. Management is mainly based on the application of synthetic fungicides and cultural practices. However, both methods have limitations which result in their inefficiency. Several studies have reported on the use of plant extracts and biological control to manage plant diseases. The aim of this study was to formulate an effective and practical approach to manage tomato seedling dampingoff using extracts of Monsonia burkeana and Moringa oleifera and a biological control agent Trichoderma harzianum. The efficacy of both extracts was investigated under laboratory conditions to determine the most suppressive concentration to R. solani growth. Methanolic extracts from both plants significantly suppressed pathogen growth at different concentrations. M. burkeana significantly reduced R. solani growth at 8 g/mL (71%) relative to control whilst Moringa oleifera extract reduced pathogen growth by 60% at a concentration of 6 g/mL. The highest suppressive concentrations were further evaluated under greenhouse conditions to test their efficacy on seedling damping-off. In damping-off treatments, both plant extracts and T. harzianum also significantly reduced (p=0.5) pre- and post-emergence dampingoff incidence. M. burkeana recorded the highest suppression at 78%, followed by M. oleifera at 64%. Trichoderma harzianum reduced incidence of damping-off by 60% and this was higher than both plant extract treatments.

Screening of Antioxidant and α-Glucosidase Inhibitory Activities of Indian Medicinal Plants

2020 ◽  
Vol 16 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Pavan K. Mujawdiya ◽  
Suman Kapur
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Plant Extracts ◽  
Moringa Oleifera ◽  
Mangifera Indica ◽  
Dry Weight ◽  
Terminalia Arjuna ◽  
Terminalia Chebula ◽  
Albizia Lebbeck

Background and Objective: Chronic diseases are associated with low-grade inflammation and oxidative damage. Traditional medicines have been used to manage these disorders due to their high polyphenol content and potent antioxidant activity. We evaluated the in-vitro anti-diabetic and antioxidant potential of extracts of several medicinal plants namely, Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula and Hippophae rhamnoides. Methods: Total polyphenol, flavonoid, and saponin contents were estimated by standard methods. Antioxidant activity was measured using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. The anti-diabetic potential was evaluated using in-vitro α-glucosidase inhibition assay. Results: Terminalia chebula was found to be the richest in both polyphenols (566.5 ± 21.9 μg Gallic acid equivalents/mg of dry weight) and flavonoids (190.67 ± 10.78 quercetin equivalents/mg of dry weight). Extract of Terminalia arjuna was the richest source of saponins (171.92 ± 12.48 μg saponin equivalents/mg of dry weight). All plant extracts showed potent anti-oxidant activity as reflected by their IC50 values in DPPH assay, with Albizia lebbeck (IC50 = 1.35 μg/ml) being the most potent. All plant extracts also showed potent anti-diabetic activity as inferred from their ability to inhibit α- glucosidase, the principal enzyme involved in the metabolism of dietary carbohydrates in the intestine. It was observed that all tested extracts were more potent (IC50 2.53 to 227 μg/ml) in comparison to the standard α-glucosidase inhibitor Acarbose (IC50=2.7 mg/ml). Conclusions: The plant extracts of Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula, and Hippophae rhamnoides possess potent antioxidant and α- glucosidase inhibitory potential and can aid in the management of postprandial hyperglycemia and oxidative damage.

scholarly journals Repellency Effects of Three Indigenous Plant Extracts Against the Red Rust Flour Beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) in Northeastern Nigeria

2021 ◽  
pp. 46-52
Author(s):  
M. A. Medugu
Keyword(s):  
Tribolium Castaneum ◽  
Plant Extracts ◽  
Moringa Oleifera ◽  
Crop Protection ◽  
Time Intervals ◽  
University Of Technology ◽  
Short Period ◽  
Indigenous Plant ◽  
Toxicity Effects ◽  
Coleoptera Tenebrionidae

Background: The current study was conducted in the Laboratory of Department of Crop Protection, Modibbo Adama University of Technology, Yola to evaluate the repellent effects of different concentrations of extracts of Azadirachta indica (Neem, Moringa oleifera (Drum stick) and Hyptis souveolens (Pig weed) against Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) at various time intervals and their interactions. Three concentrations viz; 5, 10 and 15% were applied to evaluate the Repellence of T. castaneum at five different exposure periods of 24, 48, 72, 96 and 120 hours. Repellence action of extracts of A. indica, H. souveolens and M. oleifera evaluated against the T. castaneum had maximum repellency (81.63%) at highest concentration of 15%, followed by H. souveolens (79.37%) and M. oleifera (50.46%). Regarding interaction between concentration and time, repellence increases with respect to increase in concentration, but reduces with passage of time. This shows that toxicity effects of these plant extracts is directly affected by concentration and time. Therefore, this study confirmed that these plant extracts are effective in the management of T. castaneum and most effectively at higher concentration within short period of time.

scholarly journals Optimization of Phytosynthesis of Magnesium Oxide and Magnesium Chloride Nanoparticles

2021 ◽  
Vol 37 (2) ◽  
pp. 74-83
Author(s):  
H.O Shittu ◽  
E Igiehon ◽  
A.O Eremwanarue ◽  
R.E Oijagbe ◽  
M.O Momoh ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Plant Extracts ◽  
Magnesium Chloride ◽  
Moringa Oleifera ◽  
Volume Ratio ◽  
Light Sources ◽  
Spectroscopy Technique ◽  
Leaf Extracts ◽  
Magnesium Oxide Nanoparticles ◽  
Vis Spectroscopy

In the present study, magnesium oxide (MgO) and magnesium chloride (MgCl) nanoparticles were phytosynthesized. Selected parameters like leaf extracts from Moringa oleifera, Vernonia amygadalina and Occimum gratissimum, time of reaction, precursor salts of magnesium oxide and magnesium chloride at varying concentrations, plant extracts to precursor salts volume ratio, pH of the medium and light sources were optimized for a better production of the nanoparticles. The phytosynthesized MgO and MgCl nanoparticles were characterized using UV- Vis spectroscopy technique. The study revealed that the leaf extracts of Moringa oleifera and Vernonia amyg dalina yielded more nanoparticles; the period of 24 hours incubation was enough time for nanoparticles formation and the 0.1 and 0.01 molar concentrations of the precursor salts gave optimal yields of the nanoparticles. The plant extracts at ratio two (2) to precursor salt solution at ratio three (3) resulted in better yield of the nanoparticles; the alkaline pH of 9 and 11 gave better nanoparticles synthesis and the visible light source and dark room environments were better exposure conditions for the nanoparticles formation. Keywords: Leaf extracts, Magnesium chloride nanoparticles, Magnesium oxide nanoparticles, Phytosynthesis, UV- Vis spectroscopy.

scholarly journals Comparative Efficacy of Tephrosia vogelii and Moringa oleifera against Insect Pests of Watermelon (Citrullus lanatus Thumb)

2015 ◽  
Vol 51 ◽  
pp. 5-12 ◽  
Author(s):  
F.O. Alao ◽  
T.A. Adebayo
Keyword(s):  
Plant Extracts ◽  
Moringa Oleifera ◽  
Insect Pests ◽  
Block Design ◽  
Phyllotreta Cruciferae ◽  
Insecticidal Efficacy ◽  
Randomized Complete Block Design ◽  
Tephrosia Vogelii ◽  
Set Up ◽  
Fast Acting

Despite the fact that synthetic insecticides are fast acting, they constitute environmental hazard thereby necessitating the use of ecologically based alternative such as plant based insecticide. This experiment was conducted during the late and early planting seasons of 2011 to determine the insecticidal efficacy of Tephrosia vogelii and Moringa oleifera extracts at three tested concentrations (5, 10 and 20% v/v) against insect pests of watermelon. The experiment was set up in a randomized complete block design with three replicates. The results showed that M. oleifera extracts had 62% reduction of Phyllotreta cruciferae compared with T. vogelii which had 45% control. However, T. vogelii extracts had 64% control of Diabrotica undecimpunctata and Bactrocera curcubitea but M. olefera extracts had 50% control. The plant extracts proved effective against studied insects when compared with untreated plots. However, the effectiveness of the two plants extracts were concentration dependent. Therefore, the two plant extracts can be used in the control of insect pests of the watermelon

scholarly journals Allelopathic properties of plant extracts as potential bioherbicides

Biljni lekar ◽  
2021 ◽  
Vol 49 (1) ◽  
pp. 94-106
Author(s):  
Dragana Bošković
Keyword(s):  
Weed Control ◽  
Plant Extracts ◽  
Agricultural Production ◽  
Plant Production ◽  
Alternative Methods ◽  
Weed Species ◽  
Negative Effects ◽  
Chemical Substances ◽  
Control Chemical ◽  
Allelopathic Effects

Weeds are constant companions of plant production. For their control chemical substances, ie herbicides are used. In addition to a number of properties, the use of herbicides has numerous consequences, for the living world and for the environment, as well. Considering their negative effects, there is a need to find alternative methods of weed control. In recent decades, numerous researches have been done within the framework of biologically and eco-friendlier acceptable ways of controlling various pests, including weeds. Bioherbicides are compounds that contain microorganisms (such as bacteria or fungi), products of their metabolism, or plant extracts that have an effect on certain weed species. In this paper, the application of plant extracts that show allelopathic effects, as potential bioherbicides, in modern agricultural production, will be discussed.

Effects of plant extracts of Bothriochloa pertusa and Urochloa mosambicensis on seed germination and seedling growth of Stylosanthes hamata cv. Verano and Stylosanthes scabra cv. Seca

1997 ◽  
Vol 48 (8) ◽  
pp. 1257 ◽  
Author(s):  
F. D. Hu ◽  
R. J. Jones
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Plant Extracts ◽  
Osmotic Potential ◽  
Root Length ◽  
Potential Effect ◽  
Control Treatment ◽  
Water Control ◽  
Stylosanthes Hamata ◽  
Allelopathic Effects

Effects of osmotic stress and of aqueous plant extracts from 4 pasture species on seed germination and seedling growth of the tropical legumes S. hamata (L.) Taub cv. Verano and S. scabra Vog. cv. Seca were investigated. Allelopathic effects of plant extracts from B. pertusa (L.) A. Camus were measured on S. scabra cv. Seca in terms of lower germination (35%) and shorter root length (35%). Extracts from Urochloa mosambicensis(Hack.) Dandy cv. Nixon had no adverse effect on Seca germination, but also reduced Seca root length. There was no evidence to support the hypothesis that B. pertusa had allelopathic effects on Verano germination or seedling growth. Extracts from Verano and Seca also reduced germination, seedling weight, and root length of Seca as well as root length of Verano. Root length was more sensitive than seedling length for ascertaining allelopathic effects, as there was no osmotic potential effect on root length up to 300 mmol/kg, whereas seedling weight and shoot length declined linearly with increasing osmotic potential (r = -0·92 and -0·99, respectively). Germination responses of Verano and Seca in solutions of both mannitol and polyethylene glycol-600 (PEG) were similar up to 300 mmol/kg, but at 600 mmol/kg Verano had a significantly higher germination in mannitol. Since the osmotic potential of the plant extracts did not exceed 78 mmol/kg, the use of osmotically adjusted control treatments had little effect on the conclusions drawn from using a distilled water control treatment.

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