volume 30 issue 1 (march 2010) : 6 - 10
WEED SEED BANK AND DYNAMICS OF WEED FLORA AS INFLUENCED BY TILLAGE AND WEED CONTROL METHODS IN MAIZE (ZEA MAYS L.)
1Department of Agronomy,
CSK H.P. Krishi Vishvavidyalaya, Palampur-176 062, India
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Agricultural Science Digest
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volume 30 issue 1 (march 2010) : 6 - 10
WEED SEED BANK AND DYNAMICS OF WEED FLORA AS INFLUENCED BY TILLAGE AND WEED CONTROL METHODS IN MAIZE (ZEA MAYS L.)
1Department of Agronomy,
CSK H.P. Krishi Vishvavidyalaya, Palampur-176 062, India
ABSTRACT
To study the effect of tillage and weed control methods on weed seed bank and composition
of weed flora in maize (Zea mays L.), a field experiment was conducted at CSK Himachal Pradesh
Krishi Vishvavidyalaya, Palampur during Kharif seasons of 2002 and 2003. The weed seed bank
study revealed that while raised seedbed resulted in lowest number of seeds of D. sanguinalis, E.
colona and P. dichotomiflorum at 0-10 cm depth, their population was reduced to a lowest level by
zero tillage at 10-20 cm and 20-30 cm soil depths. However, lowest number of C. benghalensis seeds
was recorded in zero tillage at all the soil depths. Dynamics of weed flora followed the trend of weed
seed distribution in the soil and resulted in significantly lowest population and dry matter of D.
sanguinalis, E. colona and B. ramosa in raised seedbed and of C. benghalensis in zero tillage plots.
Conventional tillage was the next best in significantly reducing the population and dry matter of D.
sanguinalis and C. benghalensis, thereby being statistically at par with raised seedbed significantly
increased the grain yield of the maize. Atrazine 1.5 kg ha-1 being at par with acetachlor 1.25 kg ha-
1 resulted in significantly lower count and dry matter of D. sanguinalis, E. colona, Commelina
benghalensis and other weeds. Aceatchlore 1.25 kg ha-1 gave complete control of B. ramosa.
Consequently, atrazine and acetachlor increased the grain yield of maize by 75.2 and 71.7 per cent,
respectively over unweeded check
of weed flora in maize (Zea mays L.), a field experiment was conducted at CSK Himachal Pradesh
Krishi Vishvavidyalaya, Palampur during Kharif seasons of 2002 and 2003. The weed seed bank
study revealed that while raised seedbed resulted in lowest number of seeds of D. sanguinalis, E.
colona and P. dichotomiflorum at 0-10 cm depth, their population was reduced to a lowest level by
zero tillage at 10-20 cm and 20-30 cm soil depths. However, lowest number of C. benghalensis seeds
was recorded in zero tillage at all the soil depths. Dynamics of weed flora followed the trend of weed
seed distribution in the soil and resulted in significantly lowest population and dry matter of D.
sanguinalis, E. colona and B. ramosa in raised seedbed and of C. benghalensis in zero tillage plots.
Conventional tillage was the next best in significantly reducing the population and dry matter of D.
sanguinalis and C. benghalensis, thereby being statistically at par with raised seedbed significantly
increased the grain yield of the maize. Atrazine 1.5 kg ha-1 being at par with acetachlor 1.25 kg ha-
1 resulted in significantly lower count and dry matter of D. sanguinalis, E. colona, Commelina
benghalensis and other weeds. Aceatchlore 1.25 kg ha-1 gave complete control of B. ramosa.
Consequently, atrazine and acetachlor increased the grain yield of maize by 75.2 and 71.7 per cent,
respectively over unweeded check
REFERENCES
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- Lynn, L.B. (1980). In : Proceedings of the North Eastern Weed Science Society, 34 : 43-50.
- Mester, T.C. and Buhler, D.D. (1986). In: Proc. North Central Weed Control Conference, 41: 4-5.
- Mishra, S.S. et al. (1996). J. Appl. Bio., 6(1&2) : 126-127.
- Mueller, T.C. and Hayes, R.M. (1997). Weed Tech., 11(4): 698-703.
- Nikolova, V. and Baeva, G. (2004). Herbologia, 5(1) : 23-29.
- Pandey, A.K. et al. ( 2001). Indian J. Agron., 46 : 260-265.
- Pareja, M.R. and Staniforth, D.W. (1985). Weed Sci., 33: 190-195.
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- Sharma, A.R. et al. (2000). Indian J. Agric. Sci., 70(11): 757-761.
- Sharma, P.K. et al. (1988). Soil Till. Res., 12: 65-79.
- Sharma, V. et al. (1998). Indian J. Agron., 43(4) : 677-680.
- Somerhalder, B.R. (1971). Weed Sci., 19 : 666-668.
- Teasdale, J.R. et al. (1991). Weed Sci., 39 : 195-199.
- Wilson, R.G. (1988). In: Weed Management in Agro ecosystems : Ecological Approaches, CRC Press, Inc., Boca, FL. pp. 25-39
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In this Article
APC
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Submit your manuscript through user friendly platform and acquire the maximum impact for your research by publishing with ARCC Journals.
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Published In
Agricultural Science Digest