EFFECT OF AQUEOUS EXTRACT OF CARTHAMUS TINCTORIUS L. ONGERMINATION AND INITIAL SEEDLING GROWTH OF ORYZA PUNCTATA L.
EFFECT OF AQUEOUS EXTRACT OF CARTHAMUS TINCTORIUS L. ONGERMINATION AND INITIAL SEEDLING GROWTH OF ORYZA PUNCTATA L.
Muhammad Ather Nadeem1, Bilal Ahmad Khan 1, Sadia Afzal2, Muhammad Azim
Khan3, Tasawer Abbas4, Muhammad Mansoor Javaid1, Muhammad Mohsin Amin1,
Naila Farooq5 Amir Aziz5
ABSTRACT
Chemical weed control method may cause environmental hazards and residual
effects in crops and soil. Alternate approach to control weeds is getting attentions in
sustainable production system. Use of aqueous extracts of crops is getting scientific
attention as eco-friendly alternative to synthetic herbicides especially under scenario of fast
increasing herbicide resistance in weeds. To investigate the herbicidal potential of aqueous
extract of winter crop Carthamus tinctorius L. (safflower) on summer weed Oryza punctata
L. (red rice) seed emergence and initial seedling growth, a study was planned. In this study,
seeds of Oryza punctata were incubated in seven concentrations (0, 0.25, 0.50, 1, 2, 4, and
8%) of different parts i.e. leaves, stem and fruit of C. tinctorius. All the tested
concentrations of various plant parts of C. tinctorius significantly inhibited the mean
emergence time, emergence index, emergence percentage (%), time taken to 50%
emergence as well as growth of O. punctata weed. However, maximum mean emergence
time (4.73 days), time taken to 50% emergence (4.19 days) was noted at 8%
concentration and emergence index of O. punctata was noted at 0.25% concentration when
fruit extract was applied. Leaf aqueous extract at the concentration of 8% caused the lowest
root length (1.53 cm), shoot length (4.51 cm) and fresh weight (54.72 g) of O. punctata.
Results suggested leaf and flower extract of C. tinctorius at 8%concentration can be used
potential bio-herbicide for the control of red rice.
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September 2020
Vol. 26, Iss. 3
