Population Interference of Glyphosate Resistant and Susceptible Ryegrass on Eucalyptus Initial Development

Braga, Andreísa Flores; Barroso, Arthur Arrobas Martins; Amaral, Cárita Liberato do; Nepomuceno, Mariluce Pascoína; Alves, Paulo Roberto Arruda

doi:10.1590/s0100-83582018360100086

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…Currently, the application of herbicides is the most-used management method for the control of these species, as it has a good cost–benefit ratio. However, the application of these products, when poorly performed, may increase the selection of herbicide-resistant plants, and it also may cause product waste, increasing costs and the risks of environmental contamination (Braga et al 2018; López-Granados 2010).…”

Section: Introductionmentioning

confidence: 99%

Discrimination of morningglory species (Ipomoea spp.) using near-infrared spectroscopy and multivariate analysis

Braga

Chiconi²,

Bacha³

et al. 2023

Weed Sci

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The occurrence of weeds is one of the main factors limiting agricultural productivity. Studies on new techniques for the identification of these species can contribute to the development of proximal sensors, which, in the future, might be coupled to machines to optimize the performance of a species-specific weed management. Thus, the objective of this study was to use near infrared spectroscopy (NIR) and multivariate analysis to discriminate three morningglory species (Ipomoea spp.). The NIR spectra were collected from the leaves of three weed species in vegetative stage (up to five leaves), within the spectral band of 4,000 to 10,000 cm-1. The discrimination models were selected according to accuracy, sensitivity, specificity, and Youden’s index and analyzed with a validation data set (n = 135). The best results occurred when the selection of spectral bands associated with the use of pre-processing was performed. It was possible to obtain an accuracy of 99.3, 98.5, and 98.7% for ivylead morningglory (Ipomoea hederifolia L.), Japanese morningglory [Ipomoea nil (L.) Roth] and hairy woodrose [Merremia aegyptia (L.) Urb.], respectively. NIR spectroscopy associated with principal component analysis and linear discriminant analysis (PC-LDA), or associated with partial least squares regression with discriminant analysis (PLS-DA), can be used to discriminate morningglory species.

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Section: Introductionmentioning

confidence: 99%

Discrimination of morningglory species (Ipomoea spp.) using near-infrared spectroscopy and multivariate analysis

Braga

Chiconi²,

Bacha³

et al. 2023

Weed Sci

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show abstract

“…Although the genetic improvement of this crop is at an advanced stage, another determining factor for the higher productivity of eucalyptus plantations is the control of diseases, pests and weeds [15,16]. Competition with weeds is a limiting factor for the development of most forest species [17]. Generally, weeds are considered the pest of greatest economic impact and phytosanitary risk in eucalyptus cultivation.…”

Section: Introductionmentioning

confidence: 99%

Development of Commercial Eucalyptus Clone in Soil with Indaziflam Herbicide Residues

Maciel,

Duque,

Carvalho

et al. 2023

Forests

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The pre-emergent herbicide indaziflam is efficient in the management of weeds in eucalyptus crops, but this plant may develop less in soil contaminated with it. The objective was to evaluate the levels of chlorophylls a and b, the apparent electron transport rate (ETR), growth and dry mass of leaves, stems and roots of Clone I144, in clayey soil, contaminated with the herbicide indaziflam and the leaching potential of this herbicide. The design was completely randomized in a 3 × 5 factorial scheme, with four replications. The leaching of indaziflam in the clayey soil profile (69% clay) was evaluated in a bioassay with Sorghum bicolor, a plant with high sensitivity to this herbicide. The injury and height of this plant were evaluated at 28 days after sowing (DAS). We believe that this is the first work on Eucalyptus in soil with residues of the herbicide indaziflam. Chlorophyll a and b contents and ETR, and height and stem dry mass of Clone I144, were lower in soil contaminated with indaziflam residues. The doses of indaziflam necessary to cause 50% (C50) of injury and the lowest height of sorghum plants were 4.65 and 1.71 g ha−1 and 0.40 and 0.27 g ha−1 in clayey soil and sand, respectively. The sorption ratio (SR) of this herbicide was 10.65 in clayey soil. The herbicide indaziflam leached up to 30 cm depth at doses of 37.5 and 75 g ha−1 and its residue in the soil reduced the levels of chlorophylls a and b, the apparent ETR and the growth of Clone I144.

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“…Although the genetic improvement of this crop is at an advanced stage, other determining factors for the high productivity of eucalyptus plantations are the control of diseases, pests and weeds [14,15]. Competition with weeds is a limiting factor for the development of most forest species [16]. In general, weeds are considered the pests of economic importance and the greatest phytosanitary risk in eucalyptus cultivation.…”

Section: Introductionmentioning

confidence: 99%

Development of Commercial Eucalyptus Clone in Soil with Indaziflam Herbicide Residues

Maciel¹,

Duque²,

Carvalho³

et al. 2023

Preprint

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The pre-emergent herbicide indaziflam is efficient in the management of weeds in eucalyptus crops, but this plant may develop less in soil contaminated with it. The objective was to evaluate the levels of chlorophylls a and b, the apparent electron transport rate (ETR), growth and dry matter of leaves, stems and roots of Clone I144, in clayey soil, contaminated with the herbicide indaziflam and the leaching potential of this herbicide. The design was completely randomized in a 3 x 5 factorial scheme, with four replications. Chlorophyll a and b contents, apparent electron transport rate (ETR), height growth and dry matter of leaves, stems and roots of Clone I144 were evaluated. The leaching of indaziflam in the clayey soil profile (69% clay) was evaluated in a bioassay with Sorghum bicolor, a plant with high sensitivity to this herbicide. The visual intoxication and height of this plant were evaluated at 28 days after sowing (DAS). Chlorophyll a and b contents and ETR, height and stem dry matter of Clone I144 were lower in soil contaminated with indaziflam residues. The dose of indaziflam, necessary to cause 50% (C50) of intoxication and the lowest height of sorghum plants, was 4.65 and 1.71 g ha-1 and 0.40 and 0.27 g ha-1 in clayey soil and sand, respectively. The sorption ratio (SR) of this herbicide was 10.65 in clayey soil. The herbicide indaziflam leached up to 30 cm depth at doses of 37.5 and 75 g ha-1 and its residue in the soil reduced the levels of chlorophylls a and b, the apparent electron transport rate (ETR) and the growth of Clone I144.

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Population Interference of Glyphosate Resistant and Susceptible Ryegrass on Eucalyptus Initial Development

Cited by 4 publications

References 18 publications

Discrimination of morningglory species (Ipomoea spp.) using near-infrared spectroscopy and multivariate analysis

Discrimination of morningglory species (Ipomoea spp.) using near-infrared spectroscopy and multivariate analysis

Development of Commercial Eucalyptus Clone in Soil with Indaziflam Herbicide Residues

Development of Commercial Eucalyptus Clone in Soil with Indaziflam Herbicide Residues

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