Abstract
Maize hybrids have different levels of tolerance to the herbicide nicosulfuron, depending on the dose, the environment, the phenological stage of the plant and the timing of nitrogen fertilization, and phytotoxic effects can occur without proper management. There is also limited information on the selectivity of current genetically modified hybrids for other recommended herbicides, such as tembotrione. Thus, the objective of this study was to evaluate the effects of herbicides (tembotrione and nicosulfuron) and the timing of nitrogen fertilization on the yield of maize hybrids. The experimental design was a randomized block design, in a 4 × 2 factorial arrangement, with 4 replicates. The treatments consisted of four treatments [weeding; nicosulfuron + atrazine (20 and 32 + 1250 g ha-1 ai) and tembotrione + atrazine (75.6 + 1250 g ha-1 ai)] and two nitrogen fertilization times (0 and 7 days after application). Maize hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2 were assessed in two growing seasons (1st and 2nd harvest) during the 2016/2017 growing season. The percentages of weed control; phytotoxicity at 7, 14 and 21 days after application (DAA); plant height; number of rows per ear; and yield at harvest were evaluated. All herbicides were more effective in controlling weeds at the 1st harvest because of favourable climatic conditions. Nitrogen fertilization can be carried out on the same day as the application of the herbicides nicosulfuron and tembotrione with no reduction in yield for the hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2.
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Claims 3
Claim · model-written summary
Herbicides controlled weeds more effectively in the first harvest under favorable climate.
- Taxon
- Maize hybridse1
- Treatment
- All herbicidese0
- Interactor
- weedse0weed
- Outcome
- controlling weedse0
- Direction
- more effectivee0
- Qualifier
- at the 1st harvest because of favourable climatic conditionse0
Not reportedComparator
Verbatim
e0“All herbicides were more effective in controlling weeds at the 1st harvest because of favourable climatic conditions”
e1“Maize hybrids have different levels of tolerance to the herbicide nicosulfuron”
Claim · model-written summary
Same-day nitrogen fertilization with nicosulfuron caused no yield reduction in three maize hybrids.
- Taxon
- Maize hybridse1
- Material
- P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2e0
- Treatment
- nicosulfurone0
- Outcome
- yielde0
- Direction
- no reductione0
Not reportedComparator
Verbatim
e0“Nitrogen fertilization can be carried out on the same day as the application of the herbicides nicosulfuron and tembotrione with no reduction in yield for the hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2”
e1“Maize hybrids have different levels of tolerance to the herbicide nicosulfuron”
Claim · model-written summary
Same-day nitrogen fertilization with tembotrione caused no yield reduction in three maize hybrids.
- Taxon
- Maize hybridse1
- Material
- P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2e0
- Treatment
- tembotrionee0
- Outcome
- yielde0
- Direction
- no reductione0
Not reportedComparator
Verbatim
e0“Nitrogen fertilization can be carried out on the same day as the application of the herbicides nicosulfuron and tembotrione with no reduction in yield for the hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2”
e1“Maize hybrids have different levels of tolerance to the herbicide nicosulfuron”
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