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2021
Villela, André Luís Gnaccarini; Martinelli, Rodrigo; Zenatti, Thiago Ferreira; Rufino-Jr, Luiz Renato; Monquero, Patricia Andrea; Conceição, Patrícia Marluci; Azevedo, Fernando Alves
Potential of two cover crops, signal grass and ruzi grass: suggested allelopathic effect on some important weeds Journal Article
In: AJCS, vol. 15, iss. 02, pp. 1835-2707, 2021.
Abstract | Links | BibTeX | Tags: cover crops, ecological mowing, integrated weed management, leaf extracts, root exudates, Urochloa
@article{nokey,
title = {Potential of two cover crops, signal grass and ruzi grass: suggested allelopathic effect on some important weeds},
author = {André Luís Gnaccarini Villela and Rodrigo Martinelli and Thiago Ferreira Zenatti and Luiz Renato Rufino-Jr and Patricia Andrea Monquero and Patrícia Marluci Conceição and Fernando Alves Azevedo},
doi = {10.21475/ajcs.21.15.02.p2958},
year = {2021},
date = {2021-01-01},
journal = {AJCS},
volume = {15},
issue = {02},
pages = {1835-2707},
abstract = {There is evidence that signal (SG) and ruzi (RG) grass have an allelopathic effect on weeds. This study aim to evaluate this effects on difficult-to-control weeds: hairy beggarticks (HB), benghal dayflower (BD), horseweed (H), sourgrass (S) and tall windmill grass (TWG). The first experiment was installed in a completely randomized design with 2 donor species (SG and RG) × 4 extract concentrations (0, 75, 150 and 225 mg ml −1) in factorial scheme with four replicates. Weed germination percentage was evaluated in three-day intervals. In the second experiment, the weeds emerged in substrates previously cultivated with SG and RG, in completely randomised block design with four replicates. The emergence, shoot growth and root growth were evaluated. The results were as follows: (i) on horseweed (H), 84% germination inhibition by RG leaf extracts and 38% emergence inhibition by SG root exudates were observed; (ii) on benghal dayflower (BD), 84% germination inhibition by RG leaf extracts and 37% emergence inhibition and 4.3 times the SRL values than control by RG root exudates; (iii) on hairy beggarticks (HB) 52% germination inhibition by RG leaf extracts scored, while SG root exudates reduced 43% of the emergence, 24% shoots biomass accumulation and 11.3% root length; (iv) on sourgrass (S) 71% germination inhibition by both donor plants and 75% germination inhibition by RG leaf extracts were measured. Finally, on tall windmill grass (TWG) 69% germination inhibition was observed upon using both donor plants. It can be concluded that foliar allelochemicals inhibit the germination of: BD > S > TWG > H > HB, while root exudate allelochemicals, inhibit the emergence and root development of all weeds.},
keywords = {cover crops, ecological mowing, integrated weed management, leaf extracts, root exudates, Urochloa},
pubstate = {published},
tppubtype = {article}
}
There is evidence that signal (SG) and ruzi (RG) grass have an allelopathic effect on weeds. This study aim to evaluate this effects on difficult-to-control weeds: hairy beggarticks (HB), benghal dayflower (BD), horseweed (H), sourgrass (S) and tall windmill grass (TWG). The first experiment was installed in a completely randomized design with 2 donor species (SG and RG) × 4 extract concentrations (0, 75, 150 and 225 mg ml −1) in factorial scheme with four replicates. Weed germination percentage was evaluated in three-day intervals. In the second experiment, the weeds emerged in substrates previously cultivated with SG and RG, in completely randomised block design with four replicates. The emergence, shoot growth and root growth were evaluated. The results were as follows: (i) on horseweed (H), 84% germination inhibition by RG leaf extracts and 38% emergence inhibition by SG root exudates were observed; (ii) on benghal dayflower (BD), 84% germination inhibition by RG leaf extracts and 37% emergence inhibition and 4.3 times the SRL values than control by RG root exudates; (iii) on hairy beggarticks (HB) 52% germination inhibition by RG leaf extracts scored, while SG root exudates reduced 43% of the emergence, 24% shoots biomass accumulation and 11.3% root length; (iv) on sourgrass (S) 71% germination inhibition by both donor plants and 75% germination inhibition by RG leaf extracts were measured. Finally, on tall windmill grass (TWG) 69% germination inhibition was observed upon using both donor plants. It can be concluded that foliar allelochemicals inhibit the germination of: BD > S > TWG > H > HB, while root exudate allelochemicals, inhibit the emergence and root development of all weeds.
Villela, André Luís Gnaccarini; Martinelli, Rodrigo; Zenatti, Thiago Ferreira; Rufino-Jr, Luiz Renato; Monquero, Patricia Andrea; Conceição, Patrícia Marluci; Azevedo, Fernando Alves
Potential of two cover crops, signal grass and ruzi grass: suggested allelopathic effect on some important weeds Journal Article
In: AJCS, vol. 15, iss. 02, pp. 1835-2707, 2021.
Abstract | Links | BibTeX | Tags: cover crops, ecological mowing, integrated weed management, leaf extracts, root exudates, Urochloa
@article{nokey,
title = {Potential of two cover crops, signal grass and ruzi grass: suggested allelopathic effect on some important weeds},
author = {André Luís Gnaccarini Villela and Rodrigo Martinelli and Thiago Ferreira Zenatti and Luiz Renato Rufino-Jr and Patricia Andrea Monquero and Patrícia Marluci Conceição and Fernando Alves Azevedo},
doi = {10.21475/ajcs.21.15.02.p2958},
year = {2021},
date = {2021-01-01},
journal = {AJCS},
volume = {15},
issue = {02},
pages = {1835-2707},
abstract = {There is evidence that signal (SG) and ruzi (RG) grass have an allelopathic effect on weeds. This study aim to evaluate this effects on difficult-to-control weeds: hairy beggarticks (HB), benghal dayflower (BD), horseweed (H), sourgrass (S) and tall windmill grass (TWG). The first experiment was installed in a completely randomized design with 2 donor species (SG and RG) × 4 extract concentrations (0, 75, 150 and 225 mg ml −1) in factorial scheme with four replicates. Weed germination percentage was evaluated in three-day intervals. In the second experiment, the weeds emerged in substrates previously cultivated with SG and RG, in completely randomised block design with four replicates. The emergence, shoot growth and root growth were evaluated. The results were as follows: (i) on horseweed (H), 84% germination inhibition by RG leaf extracts and 38% emergence inhibition by SG root exudates were observed; (ii) on benghal dayflower (BD), 84% germination inhibition by RG leaf extracts and 37% emergence inhibition and 4.3 times the SRL values than control by RG root exudates; (iii) on hairy beggarticks (HB) 52% germination inhibition by RG leaf extracts scored, while SG root exudates reduced 43% of the emergence, 24% shoots biomass accumulation and 11.3% root length; (iv) on sourgrass (S) 71% germination inhibition by both donor plants and 75% germination inhibition by RG leaf extracts were measured. Finally, on tall windmill grass (TWG) 69% germination inhibition was observed upon using both donor plants. It can be concluded that foliar allelochemicals inhibit the germination of: BD > S > TWG > H > HB, while root exudate allelochemicals, inhibit the emergence and root development of all weeds.},
keywords = {cover crops, ecological mowing, integrated weed management, leaf extracts, root exudates, Urochloa},
pubstate = {published},
tppubtype = {article}
}
There is evidence that signal (SG) and ruzi (RG) grass have an allelopathic effect on weeds. This study aim to evaluate this effects on difficult-to-control weeds: hairy beggarticks (HB), benghal dayflower (BD), horseweed (H), sourgrass (S) and tall windmill grass (TWG). The first experiment was installed in a completely randomized design with 2 donor species (SG and RG) × 4 extract concentrations (0, 75, 150 and 225 mg ml −1) in factorial scheme with four replicates. Weed germination percentage was evaluated in three-day intervals. In the second experiment, the weeds emerged in substrates previously cultivated with SG and RG, in completely randomised block design with four replicates. The emergence, shoot growth and root growth were evaluated. The results were as follows: (i) on horseweed (H), 84% germination inhibition by RG leaf extracts and 38% emergence inhibition by SG root exudates were observed; (ii) on benghal dayflower (BD), 84% germination inhibition by RG leaf extracts and 37% emergence inhibition and 4.3 times the SRL values than control by RG root exudates; (iii) on hairy beggarticks (HB) 52% germination inhibition by RG leaf extracts scored, while SG root exudates reduced 43% of the emergence, 24% shoots biomass accumulation and 11.3% root length; (iv) on sourgrass (S) 71% germination inhibition by both donor plants and 75% germination inhibition by RG leaf extracts were measured. Finally, on tall windmill grass (TWG) 69% germination inhibition was observed upon using both donor plants. It can be concluded that foliar allelochemicals inhibit the germination of: BD > S > TWG > H > HB, while root exudate allelochemicals, inhibit the emergence and root development of all weeds.
2017
Martinelli, Rodrigo; Monquero, Patrícia A.; Fontanetti, Anastácia; Conceição, Patrícia M.; Azevedo, Fernando A.
Ecological Mowing: An Option for Sustainable Weed Management in Young Citrus Orchards Journal Article
In: Weed Technology, vol. 31, iss. 2, pp. 260-268, 2017, ISSN: 0890-037X.
Abstract | Links | BibTeX | Tags: C.M. Evrard) Morrone &, Citrus latifolia (Yu. Tanaka) Tanaka., conservation agriculture, conventional mower, cover crops, ecological mower, Glyphosate, integrated weed management, mulch, no-tillage, ruzi grass, signal grass, Tahiti acid lime, Urochloa decumbens (Stapf) R.D. Webster, Urochloa ruziziensis (R. Germ. &, Zuloaga
@article{Martinelli2017,
title = {Ecological Mowing: An Option for Sustainable Weed Management in Young Citrus Orchards},
author = {Rodrigo Martinelli and Patrícia A. Monquero and Anastácia Fontanetti and Patrícia M. Conceição and Fernando A. Azevedo},
url = {https://www.cambridge.org/core/journals/weed-technology/article/abs/ecological-mowing-an-option-for-sustainable-weed-management-in-young-citrus-orchards/4090F7F06F7C0EFA72E5861A8BA4EF0C},
doi = {10.1017/WET.2017.3},
issn = {0890-037X},
year = {2017},
date = {2017-01-01},
journal = {Weed Technology},
volume = {31},
issue = {2},
pages = {260-268},
publisher = {Cambridge University Press},
abstract = {The citrus yield in Brazil is not ranked among the best in the world, potentially due to inadequate management by citrus growers. The low adoption of conservation agriculture (CA) techniques and the improper application of herbicides are also well-known problems. Thus, this study evaluated the use of CA techniques, and two Urochloa species (ruzi grass and signal grass) were used as cover crops. Two different types of mowers (ecological, EM; conventional, CM) launched the mowed biomass into different positions within a young Tahiti acid lime orchard (up to four years old). In addition, the integration of glyphosate into this management system was evaluated, with (GLY) and without (NO GLY) glyphosate application. This experiment was conducted across three growing seasons (2011-2014), in Mogi Mirim, São Paulo State, Brazil. The cover crop biomass yields and the effects of the mowing treatments, weed density, vegetative growth and fruit yields of the Tahiti acid lime trees were evaluated. In terms of major results, signal grass produced higher biomass yield values (up to 64%) than ruzi grass; EM promoted higher mowed biomass values in the intra-row (up to 5.1 ton ha−1, 9.0 times higher than CM), and a higher canopy volume (up to 33% than CM). These results were enhanced when ruzi grass was associated with the EM (56% lower weed density; 126% higher fruit yield than CM) and with GLY (52% higher fruit yield than NO GLY); and EM with GLY (43% lesser weed density and 107% higher fruit yield than NO GLY). Overall, ruzi grass was a good cover crop because it provided less competition for the citrus trees, EM provided a mulch layer in the intra-row of the citrus trees, and associated with GLY, these approaches could provide options for an integrated and more sustainable weed management, primarily for young Tahiti acid lime orchards.},
keywords = {C.M. Evrard) Morrone &, Citrus latifolia (Yu. Tanaka) Tanaka., conservation agriculture, conventional mower, cover crops, ecological mower, Glyphosate, integrated weed management, mulch, no-tillage, ruzi grass, signal grass, Tahiti acid lime, Urochloa decumbens (Stapf) R.D. Webster, Urochloa ruziziensis (R. Germ. &, Zuloaga},
pubstate = {published},
tppubtype = {article}
}
The citrus yield in Brazil is not ranked among the best in the world, potentially due to inadequate management by citrus growers. The low adoption of conservation agriculture (CA) techniques and the improper application of herbicides are also well-known problems. Thus, this study evaluated the use of CA techniques, and two Urochloa species (ruzi grass and signal grass) were used as cover crops. Two different types of mowers (ecological, EM; conventional, CM) launched the mowed biomass into different positions within a young Tahiti acid lime orchard (up to four years old). In addition, the integration of glyphosate into this management system was evaluated, with (GLY) and without (NO GLY) glyphosate application. This experiment was conducted across three growing seasons (2011-2014), in Mogi Mirim, São Paulo State, Brazil. The cover crop biomass yields and the effects of the mowing treatments, weed density, vegetative growth and fruit yields of the Tahiti acid lime trees were evaluated. In terms of major results, signal grass produced higher biomass yield values (up to 64%) than ruzi grass; EM promoted higher mowed biomass values in the intra-row (up to 5.1 ton ha−1, 9.0 times higher than CM), and a higher canopy volume (up to 33% than CM). These results were enhanced when ruzi grass was associated with the EM (56% lower weed density; 126% higher fruit yield than CM) and with GLY (52% higher fruit yield than NO GLY); and EM with GLY (43% lesser weed density and 107% higher fruit yield than NO GLY). Overall, ruzi grass was a good cover crop because it provided less competition for the citrus trees, EM provided a mulch layer in the intra-row of the citrus trees, and associated with GLY, these approaches could provide options for an integrated and more sustainable weed management, primarily for young Tahiti acid lime orchards.