NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract



New Zealand Plant Protection 60 (2007): 183-188

Optimising time of planting and herbicide aplication for control of problem weeds in maize

T.K. James, A. Rahman and M. Trolove

ABSTRACT

Field trials in Waikato, Bay of Plenty and Manawatu investigated the efficacy of pre- and post-emergence herbicides for weed control in maize crops planted early, mid or late season with prior cultivation or into a stale seedbed. Achieving good control of broadleaf weeds was easier than for annual grass weeds. Some weed species germinated over a long period from spring to summer months. The residual activity of pre-emergence herbicides was not sufficient for season-long control of such weeds in the early and mid planted crops and a post-emergence herbicide was essential to control them and to maintain grain yields. When grass weeds were dominant, the pre- and post-emergence combination still did not provide season long control in the early plantings. In late planted crops, weed control was also poor in the absence of a post-emergence herbicide even though few weeds were present at the post-emergence application time. The weed seedbank was reduced where good weed control was achieved.

Keywords: maize, herbicide, weed control, post-emergence, grass weeds, weed seedbank.

Related articles
pdfEfficacy and crop selectivity of saflufenacil alone and with partner herbicides for weed control in maize
M.R. Trolove, A. Rahman, G.C. Hagerty and T.K. James (2011)
New Zealand Plant Protection 64: 133-141
pdfEfficacy of pre-emergence herbicides on three annual grass weeds in different soils
T.K. James and A. Rahman (2009)
New Zealand Plant Protection 62: 356-362
pdfWeed seedbank dynamics in maize under different herbicide regimes
A. Rahman, T.K. James, J. Mellsop and N. Grbavac (2001)
New Zealand Plant Protection 54: 168-173
pdfEffect of cultivation methods on weed seed distribution and seedling emergence
A. Rahman, T.K. James, J. Mellsop and N. Grbavac (2000)
New Zealand Plant Protection 53: 28-33
pdfWeed competition in maize crop under different timings for post-emergence weed control
T.K. James, A. Rahman and J. Mellsop (2000)
New Zealand Plant Protection 53: 269-272
pdfSpatial distribution of weed seedbank in maize cropping fields
A. Rahman, T.K. James, N. Grbavac and J. Mellsop (1996)
Proceedings of the NZ Plant Protection Conference 49: 291-295
pdfField persistence of some maize herbicides in two soils
A. Rahman and T.K. James (1994)
Proceedings of the NZ Plant Protection Conference 47: 6-10
pdfEffect of adjuvants and stage of growth on the efficacy of three sulfonylurea herbicides on grass weeds
T.K. James and A. Rahman (1994)
Proceedings of the NZ Plant Protection Conference 47: 11-16

Copyright © 2007 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.