Abstract
Weeds are posing a serious problem in maize. The congenial climatic conditions encourage more weed growth in the widely spaced crop like maize and cause yield reduction to the tune of 29 to 70 percent. A field experiment was conducted for two years at Tamil Nadu Agricultural University, Coimbatore during kharif seasons of 2010 and 2011 to evaluate the weed management options for transgenic stacked (TC 1507 & NK 603) and conventional maize hybrids. The experiments were conducted with the following objective to evaluate the weed control efficiency and crop productivity with K salt of glyphosate formulations under field conditions. Treatments consisted of two transgenic stacked hybrids named 30V92 and 30B11 applied with glyphosate as early post emergence at 900 and 1800 g a.e ha-1 during kharif, 2010 and conventional maize hybrids named 30V92 and 30B11 applied with glyphosate by controlled droplet application method at 900, 1350 and 1800 g a.e ha-1 during kharif, 2011 compared with non transgenic counterpart maize hybrids applied with pre emergence atrazine at 0.5 kg ha-1 followed by one hand weeding on 40 DAS with and without insect management. Based on the two years field experimentation, it was found that early post emergence application of glyphosate at 1800 g a.e ha-1 gave significantly lower weed density, weed dry weight and higher weed control efficiency at all the intervals. Higher grain yield was registered with post emergence application of glyphosate at 1800 g a.e ha-1 in transgenic and conventional maize hybrid of 30V92 (12.21 t ha-1 and 11.23 t ha-1 ) during both seasons of the study. Unweeded control accounted for grain yield which in turn reflected through higher weed index
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Claims 4
Claim · model-written summary
Glyphosate at 1800 g a.e ha-1 significantly lowered weed density and weed dry weight.
- Treatment
- early post emergence application of glyphosate at 1800 g a.e ha-1e0
- Interactor
- weede0weed
- Outcome
- weed density, weed dry weighte0
- Direction
- lowere0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early post emergence application of glyphosate at 1800 g a.e ha-1 gave significantly lower weed density, weed dry weight and higher weed control efficiency at all the intervals”
t0“Maize Hybrids”
Claim · model-written summary
Glyphosate at 1800 g a.e ha-1 significantly raised weed control efficiency.
- Treatment
- early post emergence application of glyphosate at 1800 g a.e ha-1e0
- Interactor
- weede0weed
- Outcome
- weed control efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early post emergence application of glyphosate at 1800 g a.e ha-1 gave significantly lower weed density, weed dry weight and higher weed control efficiency at all the intervals”
t0“Maize Hybrids”
Claim · model-written summary
Glyphosate at 1800 g a.e ha-1 produced 12.21 t ha-1 grain yield in transgenic maize hybrid 30V92.
- Material
- transgenice0
- Treatment
- post emergence application of glyphosate at 1800 g a.e ha-1e0
- Outcome
- grain yielde0
- Direction
- Highere0
- Value
- 12.21 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher grain yield was registered with post emergence application of glyphosate at 1800 g a.e ha-1 in transgenic and conventional maize hybrid of 30V92 (12.21 t ha-1 and 11.23 t ha-1 )”
t0“Maize Hybrids”
Claim · model-written summary
Glyphosate at 1800 g a.e ha-1 produced 11.23 t ha-1 grain yield in conventional maize hybrid 30V92.
- Material
- conventional maize hybrid of 30V92e0
- Treatment
- post emergence application of glyphosate at 1800 g a.e ha-1e0
- Outcome
- grain yielde0
- Direction
- Highere0
- Value
- 11.23 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher grain yield was registered with post emergence application of glyphosate at 1800 g a.e ha-1 in transgenic and conventional maize hybrid of 30V92 (12.21 t ha-1 and 11.23 t ha-1 )”
t0“Maize Hybrids”
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