EFFECT OF PULL 5 EC AND 2,4-D ON WEED KILLING EFFICACY TOWARDS PHENOLOGY AND YEILD OF MUNGBEAN

A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN AGRONOMY SEMESTER: JANUARY–JUNE, 2015

A field experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from April 2015 to June 2015 to study the efficacy of Pull 5 EC and 2, 4-D herbicides on phenology and yield of BARI mungbean 6. The experiment comprised of 7 treatments viz. Weedy check (T ), spraying of Pull 5 EC @ 550 ml /ha at 15 and 25 DAS (T 2 1 ), spraying of Pull 5 EC @ 600 ml /ha at 15 and 25 DAS (T 3 ) , spraying of Pull 5 EC @ 650 ml /ha at 15 and 25 DAS (T ), spraying of @ Pull 5 EC 700 ml/ ha at 15 and 25 DAS (T ), spraying of Pull 5 EC @ 750 ml /ha at 15 and 25 DAS (T 6 5 ) and spraying 2,4-D 650 ml /ha at 15 and 25 DAS (T ) . Result showed that the tallest plant (36.78 cm) at harvest was obtained from spraying of Pull 5 EC @ 600 ml /ha at 15 and 25 DAS (T 7 ) and the highest dry weight of plant was observed in spraying of Pull 5 EC @ 650 ml /ha at 15 and 25 DAS (T ). At 25 DAS, the maximum number of weeds was found in (T 7 4 ) spraying 2, 4-D 650 ml /ha at 15 and 25 DAS and at 35 DAS in (T ) Weedy check. The highest weed control efficiency of 78.10 % and 78.42 % were found at 25 and 35 DAS respectively with (T 1 ) spraying of Pull 5 EC @ 600 ml /ha at 15 and 25 DAS. As far as seed yield was concerned, the highest seed yield (1.64 t/ha) was obtained from (T 4 3 ) spraying of Pull 5 EC @ 650 ml /ha at 15 and 25 DAS followed by (T ) spraying of Pull 5 EC @ 600 ml /ha at 15 and 25 DAS (1.6 t/ha). On the other hand spraying of 2, 4-D had negative impact on growth and yield of mungbean. 3 4 3