Abstract
Effective weed control in no-till systems is mainly based on herbicides. Appropriate weed management strate- gies can reduce the application of herbicides to a considerable extent. In the study, a possible weed management has been envisaged in zero-till (ZT) with and without residue, and conventional till (CT) wheat [ Triticum aestivum (L.) emend. Fiori & Paol.] during 2010-11 and 2011-12 at Indian Agricultural Research Institute, New Delhi follow- ing residual effects of 12 weed control treatments, comprising of tank-mix and sequential application of herbicides in the previous rainy ( kharif) seasons, 2010 and 2011 in maize ( Zea mays L.). It was observed that total density of weeds did not differ significantly between weed control treatments adopted during previous rainy seasons. But, ZT with maize residue retention (ZT+R) caused a significant reduction on the population of grasses (e.g. Phalaris mi- nor, Avena ludoviciana), broad-leaved (e.g. Chenopodium album, Melilotus indica) and total weeds compared to CT and ZT (without residue). Wheat yield was almost similar in all previous season tank-mix and sequential herbi- cide applications except that in weed-free check adopted during both the seasons in both years. But, the tank-mix pre-emergence application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha combined with ZT+R resulted in higher wheat yield, and was comparable with weed-free check, indicating its considerable residual effect on weeds in wheat. This tank-mix pre-emergence application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha when followed by ZT in wheat fetched higher net returns and net benefit:cost, which showed its superiority over other weed control treatments except weed-free check.
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Claims 5
Claim · model-written summary
Previous maize weed treatments did not significantly differ in total weed density in wheat.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- weed control treatmentse0
- Outcome
- total density of weedse0
- Direction
- did not differe0
- Comparator
- between weed control treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total density of weeds did not differ significantly between weed control treatments adopted during previous rainy seasons”
t0“wheat”
Claim · model-written summary
Zero tillage with maize residue reduced grass, broadleaf and total weed populations versus conventional and residue-free zero tillage.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ZT with maize residue retention (ZT+R)e0
- Interactor
- Phalaris mi- nore0weed
- Outcome
- population of grassese0
- Direction
- reductione0
- Comparator
- CT and ZT (without residue)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ZT with maize residue retention (ZT+R) caused a significant reduction on the population of grasses (e.g. Phalaris mi- nor, Avena ludoviciana), broad-leaved (e.g. Chenopodium album, Melilotus indica) and total weeds compared to CT and ZT (without residue)”
t0“wheat”
Claim · model-written summary
Wheat yield was nearly similar across prior herbicide applications, aside from the weed-free check.
- Taxon
- WheatTriticum aestivume0
- Treatment
- tank-mix and sequential herbi- cide applicationse0
- Outcome
- Wheat yielde0
- Direction
- almost similare0
- Comparator
- weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yield was almost similar in all previous season tank-mix and sequential herbi- cide applications except that in weed-free check”
Claim · model-written summary
Pendimethalin plus imazethapyr with residue-retaining zero tillage produced higher wheat yield comparable to the weed-free check.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha combined with ZT+Re0
- Outcome
- wheat yielde0
- Direction
- highere0
- Comparator
- weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tank-mix pre-emergence application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha combined with ZT+R resulted in higher wheat yield, and was comparable with weed-free check”
t0“wheat”
Claim · model-written summary
Pendimethalin plus imazethapyr followed by zero tillage gave higher net returns and net benefit to cost than other treatments except the weed-free check.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha when followed by ZTe0
- Outcome
- net returns and net benefit:coste0
- Direction
- highere0
- Comparator
- other weed control treatments except weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tank-mix pre-emergence application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha when followed by ZT in wheat fetched higher net returns and net benefit:cost, which showed its superiority over other weed control treatments except weed-free check”
t0“wheat”
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