ALLELOPATHIC EFFECTS OF AQUEOUS EXTRACTS OF Carthamus tinctorius L. ON EMERGENCE AND SEEDLING GROWTH OF Echinochloa crus-galli L. | [Pakistan Journal of Weed Science Research • 2020]

Author(s):

1. Muhammad Ather Nadeem: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

2. Bilal Ahmad Khan: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

3. Sadia Afzal: Department of Botany, University of Agriculture Faisalabad,Pakistan

4. Ahsan Aziz: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

5. Rizwan Maqbool: Department of Agronomy, University of Agriculture Faisalabad,Pakistan

6. Muhammad Mohsin Amin: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

7. Amir Aziz: Department of Soil & Environmental Sciences, College of Agriculture, University of Sargodha,Pakistan

8. Amjed Ali: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

9. Muhammad Adnan: Department of Agronomy, College of Agriculture, University of Sargodha,Sargodha,Pakistan

10. Durrishahwar: Department of Agriculture, University of Swabi,KP,Pakistan

Abstract:

Plant secretions have ability either to promote or inhibit seed germination and seedling growth of surrounding crops and weeds and this situation is termed as allelopathy. Laboratory experiment was performed to determine the suppressive or simulative influence of aqueous extracts of leaves, stem and fruit of Carthamus tinctorius L. at different concentrations(0, 0.25, 0.50, 1, 2, 4, and 8%)on Echinochloa cruss-galli L. Results revealed that 8%concentration of aqueous extracts of all tested parts of C. tinctorius was most phytotoxic against germination as well growth of E. cruss-galli. Maximum mean emergence time (5.60 days), minimum emergence index (1.87), time to 50% emergence (6.17 days), minimum shoot (5.82 cm) and root length (1.91 cm) were recorded with the application of leaf extract at 8% concentration of C. tinctorius. The E. cruss-galli emergence percentage (53.33%) and seedling fresh biomass (15.35 g) was minimum when treated with 8% aqueous extract of C. tinctorius fruit extract. The lower concentration (0.25% to 2%) of all the studied extracts showed a hermetic response and stimulated the root, shoot and seedling fresh weight of E. cruss-galli. The aqueous extracts inhibitory effect was in order of leaf > fruit > stem. This study leads to conclusion that 8% or higher concentration of C. tinctorius leaf aqueous extract may be exploited to biologically suppress the E. cruss-galli.

Page(s): 367-379

DOI: DOI not available

Published: Journal: Pakistan Journal of Weed Science Research, Volume: 26, Issue: 3, Year: 2020

Keywords:

Seedling Growth , Emergence , Allelopathy , inhibitory , extractsconcentrations

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