Glyphosate-resistant Digitaria insularis effect on eucalyptus initial growth

Guidugli, Tauane Botelho; Bacha, Allan Lopes; Martins, Heytor Lemos; Novello, Bruna Dal’Pizol; Alves, Pedro Luis da Costa Aguiar

doi:10.1007/s11056-024-10028-y

New Forests

2024

DOI: 10.1007/s11056-024-10028-y

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Glyphosate-resistant Digitaria insularis effect on eucalyptus initial growth

Tauane Botelho Guidugli,

Allan Lopes Bacha,

Heytor Lemos Martins

et al.

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2024

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Cited by 2 publications

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Characterization of glyphosate-tolerant genetically modified eucalyptus

Mota Porto,

Wisniewski Gonsalves,

Vieira

et al. 2024

GM Crops & Food

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Eucalyptus stands out as one of the most productive tree species for large-scale cultivation. However, like all cultivated crops, it requires specialized management practices, including the control of weeds, pathogens, and pests. Glyphosate is the most widely applied herbicide used in the essential weeding effort, and it ensures the sustainable management of eucalyptus cultivation in Brazil. Given the sensitivity of eucalyptus to glyphosate, existing weed control methods in young eucalyptus farms predominantly rely on protected mechanical or/and knapsack spraying. Both methods contribute to herbicide drift, which compromises tree yield and increases chemical waste due to uneven spraying. This study provides a detailed observation of the physiological parameters and long-term field performance of glyphosate-tolerant (HT), genetically modified (GM) eucalyptus developed by FuturaGene/Suzano S.A. and approved in Brazil for operational deployment. The HT GM eucalyptus events were meticulously evaluated to ensure high levels of glyphosate tolerance. This involved the direct application of herbicide on seedlings in greenhouse studies and on young trees in field conditions. The herbicide-treated GM eucalyptus in all trials demonstrated consistent growth and maintained physiological parameters comparable to their respective non-sprayed wild-type (WT) counterparts. The HT GM eucalyptus represents a significant advancement by enabling the direct application of glyphosate over the top of the trees to control the weeds within the planting row. This innovative approach minimizes the need for frequent mechanical and manual interventions, thereby lowering worker herbicide exposure, reducing the environmental impact of mechanical operations, and enhancing the overall efficiency and sustainability of HT GM eucalyptus stands.

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Characterization of glyphosate-tolerant genetically modified eucalyptus

Mota Porto,

Wisniewski Gonsalves,

Vieira

et al. 2024

GM Crops & Food

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Impacts of Weed Resistance to Glyphosate on Herbicide Commercialization in Brazil

Procópio,

Barizon,

Pazianotto

et al. 2024

Agriculture

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Herbicides are essential tools for the phytosanitary security of agricultural areas, but their excessive use can cause problems in agricultural production systems and have negative impacts on human health and the environment. The objective of this study was to present and discuss the main causes behind the increase in herbicide commercialization in Brazil between 2010 and 2020. Data from the Brazilian pesticide database, provided by the Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA), were used. In 2010 and 2020, Brazil sold 157,512 and 329,697 tons of herbicide active ingredients, respectively, representing a 128.1% increase in commercialization over 11 years. Some herbicides, such as clethodim, haloxyfop-methyl, triclopyr, glufosinate, 2,4-D, diclosulam, and flumioxazin, showed increases in sales volumes between 2010 and 2020 of 2672.8%, 896.9%, 953.5%, 290.2%, 233.8%, 561.3%, and 531.6%, respectively, percentages far exceeding the expansion of Brazil’s agricultural area. The primary reason for this sharp increase in herbicide sales was the worsening cases of weeds resistant and tolerant to glyphosate, with species such as Conyza spp., Amaranthus spp., Digitaria insularis, and Eleusine indica standing out. This situation created the necessity of the use of additional herbicides to achieve effective chemical control of these weed species.

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Glyphosate-resistant Digitaria insularis effect on eucalyptus initial growth

Cited by 2 publications

References 56 publications

Characterization of glyphosate-tolerant genetically modified eucalyptus

Characterization of glyphosate-tolerant genetically modified eucalyptus

Impacts of Weed Resistance to Glyphosate on Herbicide Commercialization in Brazil

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