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Effect of tillage on the
efficacy of CGA362622 on weed control in maize
J. U. Chokor1, C. E. Ikuenobe2*
and C. N. Odoh1
1Department
of Soil Science, University of Benin, Benin-City, Nigeria.
2Nigerian
Institute for Oil Palm Research, Benin-City, Nigeria.
*Corresponding author. E-mail:
jutienyi@yahoo.com.
Accepted
23 October, 2008 |
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A field trial was conducted to assess the performance of
CGA362622 (trifloxysulfuron sodium), a sulfonylurea based
herbicide formulated with ametryn (N-ethyl-N-(1- methy
(ethyl)-6-(methylthio)-1,3,5-triazine-2, 4-diamine) on weed
control in maize at the Faculty of Agriculture, University
of Benin, Benin City, Nigeria. The herbicide was applied
pre-emergence at 200 g ai/ha and post emergence at 300 g a.i.
ha-1 under three tillage methods. The trial was
laid out in a split plot arrangement in a randomized
complete block design. The main plots were tillage and
subplots treatments were the weed control methods. The
tillage treatments were no-till with existing stubble packed
(NT), ploughed (P), and ploughed and harrowed to obtain a
fine seed bed (P+H). The subplots were herbicide (H) and no
herbicide (NH). Weed regeneration was significantly higher
under NT compared with other methods of land preparation.
The herbicide treatment depressed maize yield. Grain yields
were 1619.58 and 277.46 kg/ha for H and NH, respectively.
Tillage treatment significantly affected grain yield with
values of 3446.4, 2296.67 and 841.99 kg/ha for P+H, P and
NT, respectively (P<0.05).
Key
words:
Plough, no-till, herbicides. |
