scholarly journals The Allelopathic Effect of Eucalyptus Leaf Extract on Grass Forage Seed

2015 ◽  
Vol 33 (2) ◽  
pp. 193-201 ◽  
Author(s):  
F.P. Carvalho ◽  
C.A.D. Melo ◽  
M.S. Machado ◽  
D.C.F.S. Dias ◽  
E.M. Alvarenga
Keyword(s):  
Leaf Extract ◽  
Allelopathic Effect ◽  
Panicum Maximum ◽  
Allelopathic Potential ◽  
Eucalyptus Leaves ◽  
Randomized Design ◽  
Urochloa Decumbens ◽  
Completely Randomized Design ◽  
Germination Vigor ◽  
Eucalyptus Urograndis

This study aimed to evaluate the allelopathic effect of various concentrations of an aqueous extract of eucalyptus leaves on Urochloa decumbens and Panicum maximum seeds. The extract was prepared from Eucalyptus urograndis leaves that were milled and mixed with distilled water in a 1:9 milled leaves: water ratio to obtain an extract with a defined concentration of 100%. In addition, dilutions of 50%, 25% and 12.5% were prepared, and a 0% dilution was used as a control. The experiment followed a completely randomized design, with four replicates, each of 50 seeds of U. decumbens and 50 seeds of P. maximum, arranged on filter paper moistened with each concentration of extract in a Gerbox plastic box. The results demonstrated the allelopathic potential of E. urograndis aqueous extracts applied to the seeds of U. decumbens and P. maximum. The 50% and 100% concentrations of leaf extract most strongly inhibited the germination, vigor and seedling growth of U. decumbens and P. maximum. The germination speed index and the root length were the characteristics that were most affected by the potentially allelopathic substances contained in the eucalyptus extracts at all concentrations.

scholarly journals Initial Development of Eucalyptus According to Different Desiccation Periods of Signalgrass

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
Y. GRAAT ◽  
A.L. BACHA ◽  
M.P. NEPOMUCENO ◽  
P.L.C.A. ALVES
Keyword(s):  
Dry Matter ◽  
Control Sample ◽  
Experimental Period ◽  
Initial Development ◽  
Randomized Design ◽  
Urochloa Decumbens ◽  
Completely Randomized Design ◽  
Red Latosol ◽  
Eucalyptus Urograndis ◽  
Herbicide Glyphosate

ABSTRACT: This study aimed at evaluating the effects of different desiccation periods of Urochloa decumbens on the initial development of Eucalyptus urograndis (clone C-219H). The experiment was conducted in 100 liter concrete boxes, previously filled with Dark-Red Latosol. U. decumbens was sown in all plots, except for the control sample without covering. After 95 days from sowing, the herbicide glyphosate (dose of 1,424 g a.e. ha-1) was sprayed at intervals of 0 (Apply-Plant), 7, 14, 21, 28 and 35 days before eucalyptus planting, plus a control sample without covering, totaling seven treatments. A completely randomized design with six replications was used. Eucalyptus plants were evaluated 30, 60 and 90 days after planting (DAP), when the height of the plants and the diameter of the stem were determined. At the end of the experimental period (90 DAP), the leaf area and the dry matter of leaves and stem were measured. It is possible to conclude that the Apply-Plant modality was harmful to some of the eucalyptus characteristics (E. urograndis - C-219H), while planting the seedlings in periods over 14 days after the desiccation of U. decumbens plants promoted a better development of the culture.

scholarly journals Dynamics of Clomazone Formulations Under Different Applications Conditions

2019 ◽  
Vol 37 ◽  
Author(s):  
L. TROPALDI ◽  
I.P.F.S. BRITO ◽  
R.C. DIAS ◽  
M.L.B. TRINDADE ◽  
C.A. CARBONARI ◽  
...  
Keyword(s):  
Dry Matter ◽  
Soil Surface ◽  
Physicochemical Characteristics ◽  
Rainfall Simulation ◽  
Panicum Maximum ◽  
Sugarcane Straw ◽  
Randomized Design ◽  
Urochloa Decumbens ◽  
Completely Randomized Design ◽  
Production Areas

ABSTRACT: Maintenance of straw on the soil surface in sugarcane production areas can influence weed occurrence and herbicide dynamics. After application, considerable losses of clomazone can occur as a result of its physicochemical characteristics. For this reason, novel formulations have been developed. In addition to the conventional formulation, microencapsulated formulations are currently available. Thus, the aim of this study was to observe and compare the effect of clomazone formulations under different application conditions. For this purpose, the experiment was carried with 12 treatments in a completely randomized design, with four replications, using clomazone formulations (1,200 g a.i. ha-1), on soils with different moisture levels, in the presence and absence of sugarcane straw, followed or not by rainfall simulation. The treatments were compared by observation of number of emerged plants and phytotoxicity at 7 and 14 DAA, as well shoot dry matter at 14 DAA for Ipomoea nil, Urochloa decumbens and Panicum maximum. In general, the microencapsulated formulation presented a better performance under the less suitable application conditions when compared to the conventional one. However, for the other conditions, both formulations had a similar performance.

scholarly journals Essential oil of Lippia alba (Mill.) N.E.Br. influences the germination, vigor and emergence of lettuce seeds

2019 ◽  
Vol 13 (3) ◽  
pp. 416-425
Author(s):  
Leonardo Antonio Thiesen ◽  
Denise Schmidt ◽  
Marcos Vinícius Marques Pinheiro ◽  
Ezequiel Holz ◽  
Bruna Stringari Altissimo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Lettuce Seed ◽  
Allelopathic Potential ◽  
Lippia Alba ◽  
Lettuce Seeds ◽  
Randomized Design ◽  
Germination Vigor ◽  
Environment Experiment

Secondary metabolites are produced by certain plant species and may influence the development of some species through the action of allelopathic effects. Thus, the objective of this study was to evaluate the allelopathic effect of Lippia alba essential oil on the germination, emergence and vigor of seedlings of different batches of lettuce seeds. This experiment was conducted in a completely randomized design with a 3´5 factorial scheme consisting of three batches of seeds of the cultivar Grand Rapids® and five doses of L. alba essential oil (0, 0.25, 0.50, 0.75 and 1.00%) diluted in distilled water and homogenized in Tween® 80. Seed germination and vigor, in the laboratory (experiment I), and emergence, in a protected environment (experiment II), were evaluated. The results demonstrated that there was an inhibitory effect with a significant reduction of germination, vigor and seed emergence when L. alba essential oil was added starting at concentrations of 0.25%. The essential oil showed allelopathic potential over different lettuce seed lots, affecting germination, vigor and seed emergence.

scholarly journals Allelopathic Effect of Parthenium hysterophorus on Germination and Growth of Some Important Crops and Weeds of Economic Importance

2018 ◽  
Vol 36 ◽  
Author(s):  
G. HASSAN ◽  
H.U. RASHID ◽  
A. AMIN ◽  
I.A. KHAN ◽  
N. SHEHZAD
Keyword(s):  
Sustainable Management ◽  
Parthenium Hysterophorus ◽  
Allelopathic Effect ◽  
Invasive Weed ◽  
Test Species ◽  
Allelopathic Potential ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
The University ◽  
Germination And Growth

ABSTRACT: Parthenium hysterophorus being a declared invasive weed worldwide is threatening the biodiversity of Pakistan. To study its allelopathic potential, laboratory and pots based studies were undertaken during July-August and October-November, 2010 in Weed Research Laboratory, Department of Weed Science, The University of Agriculture Peshawar, Khyber Pakhtunkhwa Pakistan. The experiments were conducted to investigate the allelopathic effect of parthenium on crops Triticum aestivum, Cicer arietinum and Brassica campestris, and weeds including Avena fatua, Asphodelus tenuifolius and Lolium rigidum The fresh leaves of P.hysterophorus were dried in shade and grinded. The desired quantity of powder was soaked for 16 hr. in the desired quantity of water to make the stock solution of the maximum concentration viz. 75 g L-1. Five seeds of each species were placed in Petri dishes and in pots, extracts were applied when needed. Control (0 g L-1) was also included for comparison. Both experiments were laid out as Factorial in completely randomized design (CRD) with four replications and two runs each. Since the statistical differences between the runs were non-significant the data were pooled before subjecting it to ANOVA and mean separation. The differences among the test species and the rates of parthenium extracts were different statistically (P?0.05) for all the traits examined, while for the species x parthenium concentration interaction, the differences were only significant (P?0.05) for plant height in the pot experiment. The results showed that with the increasing concentration of P. hysterophorus, all the parameters studied in the six test species were significantly decreased. Hence, the present study suggests that P. hysterophorus affects the agro-ecosystem and needs to be properly managed, moreover, its allelopathy on weeds is an encouraging finding for the weed managers for the sustainable management of weeds.

PENGARUH EKSTRAK DAUN MIMBA TERHADAP PERKEMBANGAN HAMA Callosobruchus chinensis L. (Coleoptera : Bruchidae)

AGRICA ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 32-37
Author(s):  
Yustina M.S.W Puu ◽  
Hildegardis Nalti Nansi
Keyword(s):  
Mung Bean ◽  
Leaf Extract ◽  
Callosobruchus Chinensis ◽  
Spawning Activity ◽  
Green Beans ◽  
Leaf Extracts ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Contact Poison ◽  
Neem Leaf Extract

Callosobruchus Chinensis is a pest that damages mung bean seeds in storage and causes damage to both the quality and quantity of seeds. This study aims to determine the effectiveness of neem leaf extracts in suppressing the development of the Callosobruchus Chinensis pest as one of the postharvest pests in the commodity green beans. This research conducted at the Laboratory of the Faculty of Agriculture, University of Flores, by using a Completely Randomized Design (CRD) with five treatments and three replications. The concentration of neem leaf extract treatment is 0 ml / l, 25 ml / l, 30 ml / l, 35 ml / l, and 40 ml / l. The results showed that the concentration of neem leaf extract 40 ml / l caused mortality of C. Chinensis imago as contact poison by 99% and nerve poison by 47%. While the effectiveness of the limb leaf extract on spawning activity was 86%.

scholarly journals Consumo, digestibilidade e balanço de nitrogênio de rações contendo diferentes teores de torta de murumuru em dietas para ovinos

2016 ◽  
Vol 37 (1) ◽  
pp. 415
Author(s):  
Bruno Peres de Menezes ◽  
Laurena Silva Rodrigues ◽  
José De Brito Lourenço Júnior ◽  
André Guimarães Maciel e Silva ◽  
Stefano Juliano Tavares de Andrade ◽  
...  
Keyword(s):  
Nitrogen Balance ◽  
Neutral Detergent Fiber ◽  
Panicum Maximum ◽  
Linear Effect ◽  
Randomized Design ◽  
Linear Effects ◽  
Completely Randomized Design ◽  
Quadratic Effects ◽  
Potential Use ◽  
Male Sheep

This study aimed to assess the potential use of increasing levels of murumuru cake (Astrocaryum murumuru var. murumuru, M art.) (MC) in sheep diets as a replacement for Mombasa grass (Panicum maximum Jacq). Metabolic tests were performed with 20 castrated male sheep at Embrapa Amazônia Oriental, Belém, Pará, during 26 days. The experiment was arranged in a completely randomized design, with five diets and four replications. MC0: 100% grass; MC10: 10% MC and 90% grass; MC20: 20% MC and 80% grass; MC40: 40% MC and 60% grass; and MC60: 60% MC and 40% grass. The intake and the coefficient of apparent digestibility of dry matter (DMI and CDDM), organic matter (OMI and CDOM), crude protein (CPI and CDCP), neutral detergent fiber (NDFI and CDNDF), acid detergent fiber (ADFI and CDADF), ether extract (EEI and CDEE), cellulose (CELI and CDCEL), hemicellulose (HEMI and CDHEM), and nitrogen balance (NB) of experimental diets were determined. The intake of mineral material (MMI) and lignin (LIGI) were also determined. The DMI, OMI, MMI, CPI, NDFI, and ADFI displayed a decreasing linear effect with the replacement of Mombasa grass by MC in the diet. The EEI and the LIGI presented quadratic effects according to the replacement levels of MC in the diet. The CDDM, CDOM, and CDHEM displayed increasing linear effects, between MC0 and MC60. The CDEE, CDNDF, CDADF, and CDCEL displayed a quadratic effect, with optimum replacement levels of 56.65%, 41%, 31.33%, and 27.46%, respectively. The nitrogen balance presented a negative linear effect in the range of 0% to 60% of murumuru cake. One can conclude that murumuru cake is an alternative to the dietary supplementation of ruminants in replacing the Mombasa grass because it provides an increase in the digestibility of nutrients for sheep. However, a limited replacement level must be implemented, considering that from 27.46%, 31.33%, 41%, and 56.65% replacement, a decline occurs in the CDCEL, CDADF, CDNDF, and CDEE, respectively, although a negative nitrogen balance does not occur.

scholarly journals Potensi Ekstrak Karamunting (Melastoma malabathricum L.) sebagai Insektisida Nabati untuk Mengendalikan Ulat Grayak (Spodoptera litura F.)

2019 ◽  
Vol 4 (1) ◽  
pp. 28
Author(s):  
Kartina Kartina ◽  
Shulkipli Shulkipli ◽  
Mardhiana Mardhiana ◽  
Saat Egra
Keyword(s):  
Spodoptera Litura ◽  
Leaf Extract ◽  
Feeding Activity ◽  
Larval Mortality ◽  
Wild Plant ◽  
Botanical Insecticides ◽  
Botanical Insecticide ◽  
Melastoma Malabathricum ◽  
Randomized Design ◽  
Completely Randomized Design

<h1>Spodoptera litura F. is one of the important pests in Horticulture commodities which can cause damage 80% and up to 100%. Karamunting (Melastome malabathricum) is a wild plant that grows in Tarakan City. This plant is known to contain secondary metabolites which are thought to have the potential to control pests. This study aims to determine the potential of Karamunting extract as a botanical insecticide material to control armyworms. This study uses a completely randomized design (CRD) method with 1 treatment factor, namely the concentration of Karamunting leaf extract. Potential extracts as botanical insecticides were tested by dye method using 4 concentrations, namely 0 (control); 500; 1000; 2000; 4000; and 8000 ppm. The results showed that Karamunting leaf extract was able to control armyworm pests. Giving extracts of 8000 ppm (P5) in feed caused the highest decrease in eating activity up to 41,2%, larval mortality up to 85%, and the highest mortality rate after 7 days of observation. Decreased feeding activity and larval mortality were thought to be influenced by the presence of phenol compounds, fatty acids, terpenoids, sterols and alkaloids identified in the extract. Thus, Karamunting leaf extract has the potential to be developed as an active ingredient in botanical insecticides to control armyworm.<strong></strong></h1>

scholarly journals PENGARUH WAKTU MASERASI TERHADAP AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN PEGAGAN (Centella asiatica (L.) Urban)

2020 ◽  
Vol 9 (4) ◽  
pp. 482
Author(s):  
Ni Komang Trisna Rahayu ◽  
I Dewa Gede Mayun Permana ◽  
GA. Kadek Diah Puspawati
Keyword(s):  
Antioxidant Activity ◽  
Experimental Design ◽  
Leaf Extract ◽  
Centella Asiatica ◽  
Total Flavonoid ◽  
Time Duration ◽  
Time Treatment ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Effect On Yield

This research aimed to determine the effect of maceration time on the antioxidant activity of pegagan leaf extract and to determine the best maceration time with highest antioxidant activity of pegagan leaf extract. The experimental design used was Completely Randomized Design with maceration time duration there were 18, 24, 30, 36, 42, and 48 hours. All of the treatment repeated three times to obtained 18 units of experiments. The data analyzed by analyze of variance, if the treatment had a significant effect followed by The Duncan Test. The results showed that the maceration time treatment had a significant effect on yield, total phenolik, total flavonoid, total tannin and antioxidant activity of pegagan leaf extract. The 24 hour maceration time was the best treatment with antioxidant activity 66.67%, IC50 632.82 ppm, a yield of 24.30%, a total phenolik of 57.85 mgGAE / g, a total flavonoid of 105.28 mgQE / g. total tannin 54.09 mgTAE / g.

scholarly journals KAJIAN SIFAT ORGANOLEPTIK DAN DAYA TERIMA ES KRIM JALOR (JAMBU BIJI DAN SARI DAUN KELOR)

2019 ◽  
Vol 4 (1) ◽  
pp. 47
Author(s):  
Nadya Natasya
Keyword(s):  
Adolescent Girls ◽  
Experimental Research ◽  
Young Women ◽  
Leaf Extract ◽  
Ice Cream ◽  
Food Product ◽  
Acceptance Test ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Moringa Leaf Extract

Background: Young women generally have characteristics of unhealthy meal habits and many of them lack of nutrients needed, so there is a need to have an alternative nutritionally rich and attractive food product through the manufacture of JALOR Ice Cream which is produced from Milk, Guava and Moringa Leaf Extract, to increase iron in order to prevent iron deficiency.Methods: This study was conducted using an experimental research design. The experiment was carried out using a Completely Randomized Design (CRD) using 5 treatments with the addition of Moringa Leaf Extract: t1 (10%), t2 (20%), t3 (30%), t4 (40%) and t5 (50%). The experiment were carried out on hedonic tests on 20 panelists with 5 scales, namely: 5 = Very like, 4 = Like, 3 = Neutral, 2 = Dislike, and 1 = Very dislike. Acceptance test was conducted on young women.Result: The results of the organoleptic test showed that JALOR Ice Cream was chosen on treatment t2 with the addition of 20% Moringa Leaf Extract. The results of the adolescent girls' acceptance of selected JALOR Ice Cream products showed that all (100%) panelists were at the level of good category.Conclusion: JALOR Ice Cream is with the addition of 20% Moringa Leaf Extract is the most preffered. The acceptance of Ice Cream can be well received by panelists.

scholarly journals Produktivitas Rumput Hamil (Panicum maximum cv Hamil) yang Ditanam Menggunakan Benih Berbeda

2021 ◽  
Vol 26 (3) ◽  
pp. 444-449
Author(s):  
Ahmad Fanindi ◽  
Endang Sutedi ◽  
Harmini Harmini
Keyword(s):  
Reproductive Traits ◽  
Morphological Characters ◽  
Selection Method ◽  
Panicum Maximum ◽  
Plant Materials ◽  
Randomized Design ◽  
Different Types ◽  
Completely Randomized Design ◽  
The Difference ◽  
Generative Phase

Reproductive traits determine the selection method in plant breeding. The benggala grass of the Hamil cultivar was thought to be apomictic; thus, a study was conducted to determine its reproduction. The research began by studying the morphological characters, continued with observing the generative phase and seed production of the cultivar planted from seeds (generative) and from pols (vegetative). The experiment was conducted in the greenhouse of the Research Institute of Animal Production. The experimental design was a completely randomized design with ten replications, and the treatments were different types of plant materials: seeds and pols. The Hamil cultivar taken from RIAP Collection was planted in pots with a diameter of 40 cm and a height of 30 cm. The results showed that most of the morphological characters of the Hamil cultivar planted from seeds and from pols were not different (P >0.05), so it was presumed that they were apomictic. The difference in morphology was only in the length and width of the flag leaves and the length of the internodes, where the cultivars planted using seeds were higher. The production of seeds, pithy seed weight, and seed germination of cultivars planted using seeds were higher (P <0.05). Further research is needed to determine the apomixis properties based on cytologically Hamil cultivars.   Keywords: apomixis, benggala grass, morphology, plnting material; seed

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