scholarly journals Studies of allelopathic effect of Lantana camara aqueous leaf extract on growth of Parthenium hysterophorus in flowering stage

2011 ◽  
Vol 4 (6) ◽  
pp. 33-35 ◽  
Author(s):  
Dr. Arpana Mishra ◽  
Keyword(s):  
Leaf Extract ◽  
Lantana Camara ◽  
Parthenium Hysterophorus ◽  
Allelopathic Effect ◽  
Flowering Stage ◽  
Aqueous Leaf Extract

scholarly journals Propagation and Possible Allelopathic Effects of Vernoniazeylanica on Selected Bioassay Species

CORD ◽  
2020 ◽  
Vol 36 ◽  
pp. 41-46
Author(s):  
S.H.S. Senarathne ◽  
S. S. Udumann
Keyword(s):  
Seed Germination ◽  
Plant Species ◽  
Seedling Growth ◽  
Contaminated Soil ◽  
Leaf Extract ◽  
Cocos Nucifera ◽  
Test Plant ◽  
Allelopathic Effect ◽  
Aqueous Leaf Extract ◽  
Allelopathic Effects

Vernonia zeylanica (L.) belongs to the family Asteraceae, is one of the major endemic weed species present in coconut (Cocos nucifera L.) plantations of the tropics, which propagates very easily.  There is a possibility that this plant could also possess allelopathic effects, but this has not been scientifically tested.  Thus, a study was carried out to determine the seed germination of V. zeylanica under soil moisture stress conditions, shoot propagation methods and possible allopathic effects of this species, on selected species in bioassay tests.  Germination of V. zeylanica seeds was not observed at higher osmotic potential (-0.9 MPa).  The highest sprouting percentage of this species were obtained with soft wood cuttings.  The aqueous leaf extract was highly phytotoxic, and it significantly reduced germination and seedling growth of all bioassay species tested. Full strength (33.3 g L-1) aqueous extracts of leaves significantly reduced the germination percentage, root and hypocotyl growth rates of all species tested.  The inhibitory effects were often dependent on concentration.  However, the degree of inhibition varied among the test plant species.  The seedling emergences of all four tested plants were severally inhibited when planted in V. zeylanica contaminated soil.  The results indicated that incorporated aqueous leaf extract of V. zeylanica and its rhizosphere contaminated soil can suppress seed germination, seedling growth and seedling emergence of certain plant species indicating a possible allelopathic effect.

scholarly journals Nematicidal Activity of Lantana Camara L. for Control of Root-Knot Nematodes

2015 ◽  
Vol 3 (1) ◽  
pp. 1-5
Author(s):  
Ganesh Ghimire ◽  
Ranjana Gupta ◽  
Arvind K Keshari
Keyword(s):  
Leaf Extract ◽  
Lantana Camara ◽  
Root Knot Nematode ◽  
Second Stage ◽  
Time Period ◽  
S 100 ◽  
Meloidogyne Spp ◽  
Aqueous Leaf Extract ◽  
Chemical Pesticides

Various concentrations of aqueous leaf extract of Lantana camara L. were assessed against second stage juveniles (J2) of Meloidogyne spp. (Goeldi, 1982) for its nematicidal potency in vitro conditions. Study showed 50% concentration of Lantana camara leaf extract at 48 hrs of incubation period and above showed effective in immobilizing second stage of larvae (J2) of Meloidogyne spp. The standard concentration ‘S’ (100%) of leaf extract was found to be highly nematostatic, 98.66% of nematode were found dead in 48 hrs. Similarly, 57.66% of nematode juveniles were found dead when applied 50% concentration in 48 hrs. Mean number of (J2) dead at 100% concentration for three time period was statistically significant highest at 48 hrs. So far, 50% concentration in 48 hrs and above was appropriate for controlling the root-knot nematode which seems as an alternative to chemical pesticides.

scholarly journals Studies on Allelopathic Effect of Aqueous Leaf Extract of Putranjiva Roxburghii Wall. on Seed Germination and Early Growth of Chickpea (Cicer Arietinum L.)

2019 ◽  
Author(s):  
Satyajit Oraon ◽  
Subrata Mondal
Keyword(s):  
Seed Germination ◽  
Leaf Extract ◽  
Inhibitory Effect ◽  
Early Growth ◽  
Growth Stages ◽  
Allelopathic Effect ◽  
Leaf Extracts ◽  
Cicer Arietinum L ◽  
Aqueous Leaf Extract ◽  
Putranjiva Roxburghii

The present study reveals the allelopathic effect of aqueous leaf extracts of Putranjiva roxburghii Wall. on seed germination and early growth stages of an economically important plant chickpea (Cicer arietinum L.). Aqueous leaf extracts at 0, 5, 10, 15, 25, 35, 50, 75 and 100% concentrations were applied to determine their effect on seed germination and early growth stages under laboratory conditions. Laboratory-based experiments with three replicates were used to arrange treatments accordingly. After 5 days of incubation the rate of seed germination, radicle length and hypocotyls length etc. of chickpea seeds were observed after treatment with aqueous leaf extracts. Highest inhibitory effect was noticed in 100% of aqueous leaf extract. Results indicated that the inhibitory effect was proportional to the concentration of the extracts. The water soluble leaf extracts contain allelochemicals, which inhibit the seed germination and reduced the early growth of chickpea.

Aqueous Leaf Extract of Duranta repens Promotes Seed Germination and Seedling Growth of Salinity-Stressed Solanum lycopersicum Seedlings.

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Shuaib olasupo Osineye
Keyword(s):  
Solanum Lycopersicum ◽  
Leaf Extract ◽  
Growth Parameters ◽  
Chlorophyll Concentration ◽  
Allelopathic Effect ◽  
Distilled Water ◽  
Positive Role ◽  
Aqueous Leaf Extract ◽  
Group 5 ◽  
Group 2

Aqueous extract of Duranta repens leaves was investigated for its allelopathic effect on Solanum lycopersicum seedlings germinated and grown under salinity condition. The study was carried out using both laboratory petridish and pot assays to simulate the plant’s immediate environmental conditions. The experiment consisted of 5 groups (1-5) each containing 4 replicates (of 10 seeds). Group 1 was treated with distilled water; Group 2 was treated with 5 mM NaCl; Group 3 was treated with Duranta repens aqueous leaf extract, Group 4 was treated with a mixture of 5 mM NaCl and the extract (2:1 v/v) and Group 5 was treated with a mixture of 5 mM NaCl and the extract (1:2 v/v). Results from the studies revealed that treatment with NaCl caused significant (p < 0.05) reduction in percentage germination and growth parameters (plumule and radicle lengths) of S. lycopersicum seedlings, when compared to those treated with distilled water and D. rupens aqueous leaf extract. NaCl treatment (Group 2) also caused an increase in malondialdehyde (MDA) and also increased the activities of superoxide dismutase (SOD) and catalase (CAT) while reducing chlorophyll concentration of the plants. However, in the presence of the extract, the adverse effects of the NaCl were attenuated, implying that the extract improved tolerance of S. lycopersicum seedlings. In conclusion, the findings of this study indicate that the constituents of the extract may play a positive role in plant survival under saline conditions and could be employed in the management of soil salinity problem in agriculture.

Enhanced larvicidal, antibacterial, and photocatalytic efficacy of TiO2 nanohybrids green synthesized using the aqueous leaf extract of Parthenium hysterophorus

2017 ◽  
Vol 25 (11) ◽  
pp. 10328-10339 ◽  
Author(s):  
Keerthika Thandapani ◽  
Manikandan Kathiravan ◽  
Elangovan Namasivayam ◽  
Indira Arulselvi Padiksan ◽  
Geetha Natesan ◽  
...  
Keyword(s):  
Leaf Extract ◽  
Parthenium Hysterophorus ◽  
Aqueous Leaf Extract

scholarly journals Allelopathic effect of different accessions of Jatropha curcas on field crops in Bundelkhand Region (U.P.) India

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Neel Ratan ◽  
Ghan Shyam ◽  
R.K. Gupta ◽  
U.N. Singh
Keyword(s):  
Triticum Aestivum ◽  
Jatropha Curcas ◽  
Linum Usitatissimum ◽  
Raphanus Sativus ◽  
Leaf Extract ◽  
Allelopathic Effect ◽  
Lens Esculenta ◽  
Field Crops ◽  
Maximum Inhibition ◽  
Aqueous Leaf Extract

Allelopathic effect of three accessions of Jatropha curcas on four field crops viz. Triticum aestivum, Raphanus sativus, Linum usitatissimum and Lens esculenta through bioassy was studied in laboratory. The level of inhibition of aqueous leaf extract of J. curcas varied with its accessions and type of tested field crops. The tolerance of the crops was in order of Lens esculenta > T. aestivum > Raphanus sativus > Linum usitatissimum. Invariably, maximum inhibition was observed in the higher concentrations of aqueous extract.

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