LOW DOSES OF ATRAZINE CAUSE HORMESIS IN TRIBULUS TERRESTRIS
LOW DOSES OF ATRAZINE CAUSE HORMESIS IN TRIBULUS TERRESTRIS
Mamoona Arooj1, Bilal Ahmad Khan*1, Muhammad Ather Nadeem1, Muhammad Mansoor
Javaid1, Erum Rashid2, Muhammad Saleem Jilani3, Jamshahid Qamar1, Faryal Ali4, Sadaf
Javeria5, Muhammad Faisal4
ABSTRACT
Growth stimulation due to ultra-low doses of different herbicides in several crop
species has been observed both in controlled as well as in the field conditions; however
available data of hermetic effects on weeds growth is very limited. This study investigates
the promotive effect of low doses of atrazine on growth of Tribulus terrestris. Pot
experiments were conducted at Agronomic Research Area, collage of Agriculture, University
of Sargodha, during 2019. Six different concentrations of atrazine [0, 5, 10, 20, 40 and 80 g
a.i. ha-1] were applied as post emergence herbicides at 3- 4 leaves stage of the weeds
under two different water regimes (60 % and 100 % water concentrations). Results
revealed that increase in plant chlorophyll content, fresh weight, dry weight, root length and
shoot length were observed after spraying of atrazine @ 5, 10 and 20 g a.i. ha-1 at 100 %
water concentration. Doses of atrazine above 20 g a.i. ha-1 negatively affect the growth of
Tribulus terrestris.
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September 2021
Vol. 27, Iss. 3, Pages 253-441
