PERFORMANCE OF HERBICIDE ON WEED SIJPPRESSION TOWARDS GROWTH AND YIELD OF WHEAT

Abstract

An experiment on the perfbrrnance of herbicide (Ronstar. Sencor and I.intur) on weed suppression towards growth and yield of wheat was conducted at the Agronomy Field, Shcr-e-Bangla Agricultural University, Dhaka-1207 during the period from November. 2007 to March. 2008. The experiment was laid out in a randomized complete block design having twelve combination treatments viz. (1) Ronstar 25EC Ø 1.0 I/ha. (ii) Ronstar 25 EC @ 1.5 I/ha. (iii) Ronstar 25EC @ 2.0 I/ha. (iv) Ronstar 25flC @ 2.5 I/ha. (v) Lintur 70W6 'd 0.20 kg /ha, (vi) l.intur 70WC1 0.25 kg /ha. (vii) l,intur 70WG @ 0.30 kg /ha, (viii) Lintur 70WG @ 0.35 kg Tha. (ix) Sencor 70WG 1; 0.30 kg/ha. (x) Sencor 70\VG @ 0.40 kg fha, (xi) Sencor 70W0 47 0.50 kg /ha. and (xii) Sencor 70WG ( 0.60 kg /ha, along with control (weedy) with three replications. Result showed that higher dry wcightiplant. 1000 seed weight, total grain yield, harvest index and benefit cost ratio (42.58g. 45.84g. 3.51 t!ha. 46.69% and 1.50 respectively) were obtained with Sencor 70WC1 (i. 0.50 Kg/ha treated crop. The highest plant height, number of tillers/plant. number of spikes/plant. spike length at harvest was also observed with the same treatment. In addition to those parameters. the lowest weed dry matter (19.38 kg/ha.) by Sencor 70WG d! 0.60 kg/ha. Sencor 70W6 (21? 0.50 kg/ha, showed the highest net return (23500.00 fl/ha). So. Sencor 70WG (2 0.500.60 kg/ha, could he considered as the recommended rate for controlling weeds in wheat field.