Allelopathic potential of Carica papaya against selected weeds of wheat crop

Abstract Due to increased number of herbicide resistant weeds, it is needed to explore the allelopathic potential of plants as an alternative. The research was conducted to investigate allelopathic effects of Carica papaya L. leaf powder and aqueous extract on seeds as well as pre-germinated seeds of Avena fatua L., Helianthus annuus L., Rumex dentatus L., Zea mays L. and Triticum aestivum L. on filter paper and soil in Weed Management Program Laboratory, Department of Plant and Environmental Protection at PARC Institute of Advanced Studies in Agriculture, National Agriculture Research Centre, Islamabad, Pakistan. Germination percentage (%), radicle length (cm) and plumule length (cm) were parameters observed for ‘Plant leaf powder bioassay’ and ‘Aqueous extract method’. Most significant growth inhibition was observed in A. fatua seedlings in filter paper method. A. fatua radicle length was reduced by C. papaya aqueous extract (80%) and leaf powder (89%) bioassays. Plumule length was reduced under the influence of aqueous extract (57-73%) and powdered material (59-77%). The inhibitory effects on other test species were in sequence of H. annuus followed by Z. mays and R. dentatus. The aqueous extract showed non-significant effect on wheat seed germination, radicle and plumule growth. It is suggested that C. papaya aqueous extract can be used as source of weed management in wheat crop.

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Herbicidal potential of Aerva javanica to control wild oat in wheat crop

Allelopathy Journal ◽

10.26651/allelo.j/2020-51-2-1299 ◽

2020 ◽

Vol 51 (2) ◽

pp. 177-194

Author(s):

Al-Ghamdi A.M. ◽

El-Zohri M

Keyword(s):

Dry Weight ◽

Soluble Carbohydrates ◽

Wheat Crop ◽

Aqueous Extracts ◽

Wild Oat ◽

Culture Experiment ◽

Allelopathic Potential ◽

Root Extracts ◽

Wheat Germination ◽

Radical Length

We investigated the phytotoxicity of desert cotton (Aerva javanica) extracts on wild oat and wheat. Aqueous extracts from A. javanica roots, leaves and inflorescences collected from Jeddah and Al-Baha regions, Saudi Arabia were used. Generally, the allelopathic potential of water extracts of A. javanica collected from Jeddah were more in inhibitory to wild oat germination and seedlings growth than those from Al-Baha. In both regions, root extracts were inhibitory to wild oat followed by leaves and inflorescences extracts. All test aqueous extracts of both regions did not inhibit the wheat germination or seedlings growth.Whreas, the wild oat germination was reduced by root extracts 58.62 %, 28.62 % leaves extracts : 32.72 %, 17.72 % and inflorescences extract 28.11 %, 12.13 % by in plants samples collected from Jeddah and Al-Baha, respectively. Wild oat radical length was inhibited by root extracts 53.27 %, 32.84 % leaves 42.35 %, 9.63 % and inflorescences extracts 22.64 %, 16.75 % in case of Jeddah and Al-Baha plants, respectively. In pot culture experiment, all treatments markedly reduced the plant dry weight and soluble carbohydrates, proteins and free amino acids contents in wild oat. The differences in the allelopathic potentials of studied A. javanica extracts were related to the qualitative variations in their phytochemicals constituents. Our results showed that A. javanica extracts could be safely used to control wild oat growth in wheat fields after more detsaled research..

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ALLELOPATHIC POTENTIAL OF LANTANA CAMARA AGAINST SELECTED WEEDS OF WHEAT CROP

Applied Ecology and Environmental Research ◽

10.15666/aeer/1605_67416760 ◽

2018 ◽

Vol 16 (5) ◽

pp. 6741-6760 ◽

Cited By ~ 2

Author(s):

T ANWAR ◽

N ILYAS ◽

R QURESHI ◽

M MAQSOOD ◽

M MUNAZIR ◽

...

Keyword(s):

Lantana Camara ◽

Wheat Crop ◽

Allelopathic Potential

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PHYTOTOXIC ACTIVITY OF BIOACTIVE COMPOUNDS FROM FOUR PLANTS AGAINST SELECTED WEEDS IN AGRICULTURE

Acta Scientiarum Polonorum Formatio Circumiectus ◽

10.15576/asp.fc/2021.20.1.33 ◽

2021 ◽

Vol 20 (1) ◽

pp. 33-42

Author(s):

Tauseef Anwar ◽

◽

Huma Qureshi ◽

Keyword(s):

Carica Papaya ◽

Chenopodium Album ◽

Field Analysis ◽

Wide Field ◽

Inhibitory Effects ◽

Pinus Roxburghii ◽

Allelopathic Potential ◽

Phytotoxic Activity ◽

Hexane Extracts ◽

Living Organisms

Aim of the Study. Heavy doses of synthetic weed control chemicals have caused herbicide resistance in weeds. Natural com pounds produced by living organisms constitute a wide field for ecologically safe herbicides. The experiments were designed to test allelopathic potential of hexane extracts of selected plants against common weeds in agriculture viz. Euphorbia helioscopia, Rumex dentatus, Phalaris minor, Avena fatua and Chenopodium album. Materials and methods. Allelopathic potential of Carica papaya, Rhazya stricta, Lantana camara and Pinus roxburghii hexane extracts against weeds was determined at 100%, 75% and 50% concentration on soil, filter paper and agar. Parameters adopted for assessing allelopathic potential were the germination (%) and the length of seedling (cm). Data analysis was performed using the Statistica 9 software. Results and Conclusion. The results indicated that R. stricta, C. papaya, L. camara and P. roxburghii hexane extracts possesses suppression effects against weeds among which L. camara had the most conspicuous inhibition effects on selected weeds. The inhibitory effects of germination and seedling growth were in order R. stricta > L. camara > C. papaya > P. roxburghii. Field analysis to assess the phytotoxic ability of these species to be used as herbicide is recommended.

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Allelopathic interference of Sonchus oleraceus L. with wheat and the associated weeds: a field study

Acta agriculturae Slovenica ◽

10.14720/aas.2020.115.1.1258 ◽

2020 ◽

Vol 115 (1) ◽

pp. 123

Author(s):

Mahmoud Omar HASSAN

Keyword(s):

Field Study ◽

Total Yield ◽

Weed Suppression ◽

Integrated Weed Management ◽

Wheat Crop ◽

Nitrogen And Phosphorus ◽

Available Nitrogen ◽

Allelopathic Potential ◽

Sonchus Oleraceus ◽

Density And Biomass

A field study was conducted to examine the allelopathic potential of Sonchus oleraceus L. residue against the weeds associated with wheat crop. Residue application was carried out under field conditions in two doses: 150 and 300 g m−2. Weed richness, density and above-ground biomass were assessed at 6 and 12 weeks after application to evaluate the potential effect of S. oleaceus manure on weed control. Some growth criteria and the total yield of the cultivated wheat crop were also measured. The residue-containing quadrates attained lower weed richness, density and biomass. Unlikely, residue application reduced the grain yield of wheat. The available nitrogen and phosphorus were increased in soil at the higher application dose. These results suggest that S. oleraceus could interfere most of winter weeds, but affect productivity of wheat. Weed suppression could be attributed to the allelopathic potential of S. oleraceus residue. These results suggest also that the manure of this weed could be used successfully in the integrated weed management programs to reduce weed infestation in winter crops. However, another crop species may be selected.

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