| Pak. J. Bot., 35(2): 161-166, 2003. | Back to Contents | ||||
|
|
Updated: 09-07-09 | ||||
|
EFFECT OF CULTURAL AND CHEMICAL WEED CONTROL METHODS ON WEED POPULATION AND YIELD OF COTTON A. TANVEER, N.H. CHAUDHRY, M. AYUB AND R. AHMAD*
Abstract: Effect of cultural and chemical weed control methods on
weed population and yield of cotton (Gossypium hirsutum L.) cultivar "CIM-443"
was studied under field conditions during 1999. Weed control treatments were:
no weeding (control), two hoeings [(3 + 6 weeks after sowing (WAS)], one hoeing
(3 WAS) + one earthing-up (6 WAS), S-metolachlor @ 2.4 kg a.i.ha-1,
S-metolachlor @ 2.4 kg a.i.ha-1 + one hoeing (6WAS), S-metolachlor
@ 2.4 kg a.i.ha-1 + one earthing-up (6WAS). All weed control treatments
increased sympodial branches per plant, total number of bolls per plant, number
of open bolls per plant, seed cotton yield and decreased weed biomass significantly
over control. Maximum seed cotton yield (2207.77 kg ha-1) was obtained
in S-metolachlor treated plots and minimum from weedy check (1377.77 kg ha-1).
Different weed control treatments gave 39.85% to 60.24% more yield and 29.40%
to 53.14% more net monetary return over the control.
Department of Agronomy , University of Agriculture, Faisalabad,
Pakistan. |
|||||
| Back to Contents |
|
Back to Contents | |||