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Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn

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dc.contributor.author Soltani, N.
dc.contributor.author Vyn, R.J.
dc.contributor.author Van Eerd, L.L.
dc.contributor.author Shropshire, C.
dc.contributor.author Sikkema, P.H.
dc.date.accessioned 2013-09-17T14:43:55Z
dc.date.available 2013-09-17T14:43:55Z
dc.date.issued 2009
dc.identifier.citation Soltani, N., Vyn, R. J. , Van Eerd, L. L. , Shropshire, C. , and Sikkema, P. H.. 2009. Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn. Canadian Journal of Plant Science. 89(5): 969-975 en_US
dc.identifier.issn 1918-1833
dc.identifier.uri http://hdl.handle.net/10214/7551
dc.description.abstract A study was conducted over a 3-yr period (2003, 2004, and 2005) to evaluate the effect of reduced herbicide rates 20, 40, 60, 80, and 100% of the manufacturer’s recommended rate (MRR) on weed biomass reduction, environmental impact (EI), yield, and profitability of corn (Zea mays L.) in Ontario. The herbicide rate required to provide 95% biomass reduction of velvetleaf (Abutilon theophrasti Medic.), redroot pigweed (Amaranthus retroflexus L.), common ragweed (Ambrosia artemisiifolia L.), common lambsquarters (Chenopodium album L.), and annual grasses was 92, 30, 41, 28, and 83% of the MRR for isoxaflutole plus atrazine, 200, 119, 23, 23, and 117% of the MRR for dimethenamid plus dicamba/atrazine, 141, 72, 46, 45, and 200% of the MRR for glufosinate plus atrazine, and 81, 29, 18, 24, and 88% of the MRR for nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr, respectively. The herbicide rate required to provide 95% of weed-free corn yield was 61, 22, 130, and 11% of the MRR for isoxaflutole plus atrazine, imethenamid plus dicamba/atrazine, glufosinate plus atrazine, and nicosulfuron/ rimsulfuron plus dicamba/diflufenzopyr, respectively. Nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr had the lowest EI. The results of profitability analysis suggested that the MRR rates do not tend to maximize profit margins. In most cases, there were no significant differences in profit margins for treatments with 40, 60, 80, and 100% of the MRR. en_US
dc.description.sponsorship Ontario Corn Producers Association; Agricultural Adaptation Council en_US
dc.language.iso en en_US
dc.publisher Canadian Journal of Plant Science en_US
dc.subject Atrazine en_US
dc.subject dicamba en_US
dc.subject diflufenzopyr en_US
dc.subject dimethenamid en_US
dc.subject glufosinate en_US
dc.subject nicosulfuron en_US
dc.subject rimsulfuron en_US
dc.subject Zea mays L. en_US
dc.title Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn en_US
dc.type Article en_US
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