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ZOBIOLE,L.H.S.; GAST,R.; MASTERS,R.A.; PEREIRA,G.R.; RUBIN,R.. |
ABSTRACT: Few herbicides are currently registered in Brazil for weed control in wheat. The objective of this research was to determine the wheat crop selectivity and the response of Lolium multiflorum to pyroxsulam. Field experiments were conducted at two locations in Paraná, Brazil. At the proposed commercial rates of 15 and 18 g a.i. ha-1 pyroxsulam did not cause visual injury above 10% in wheat. Pyroxsulam caused >10% injury in wheat at one location (Cascavel) when applied at 21, 30, 36 and 42 g a.i. ha-1; however, the crop fully recovered from the injury by 28 days after application and did not have an adverse effect on wheat grain yield, regardless of the rate applied. Pyroxsulam applied at 15 or 18 g a.i. ha-1 provided excellent control (>85%)... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Visual injury; Triticum spp.; ALS-inhibiting herbicides; Systemic herbicide; Lolium multiflorum. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100263 |
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Francischini,A.C.; Constantin,J.; Oliveira JR.,R.S.; Santos,G.; Braz,G.B.P.; Dan,H.A.. |
Due to the limited number of herbicides registered for the control of dicot weeds in cotton crops, ALS inhibitors have been used on an intensive and recurrent basis. Given that, cases of poor weed control have been described after application of these herbicides in the main cotton producing areas in Brazil, the purpose of the present work was to evaluate the occurrence of resistance to ALS herbicides in Amaranthus viridis biotypes from those areas. Dose-response curves were prepared after pre-emergence applications of trifloxysulfuron-sodium (0; 1.8; 3.7; 7.5; 15 and 30 g ha-1) and pyrithiobac-sodium (0; 35; 70; 140; 280 and 560 g ha-1), equivalent to 0, ¼, ½, 1, 2 and 4 times the recommended commercial rates. The selection of trifloxysulfuron-sodium... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trifloxysulfuron-sodium; Pyrithiobac-sodium; Slender amaranth; ALS-inhibiting herbicides. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000300013 |
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