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Dutra FB, Almeida LS, Pinto GCV, Furlaneto LF, Souza TKS, Viveiros E, Piotrowski I, Piña-Rodrigues FCM, Silva JMS. Pre-emergent indaziflam can enhance forest seed germination in direct seeding? BRAZ J BIOL 2023; 83:e268716. [PMID: 37042910 DOI: 10.1590/1519-6984.268716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 03/06/2023] [Indexed: 04/13/2023] Open
Abstract
Pre-emergent herbicides can contribute to the control of weed competition in direct seeding restoration, however it is necessary to evaluate their effects on seeds of native tropical forest species. The aim of the study was to assess the potential impact of the herbicide indaziflam on the germination of 17 forest species. For this, a dosage of 180 mL of the product in 200L of water was compared to the control without herbicide. The degree of sensitivity of each species was calculated by a ratio between the percentage of germination with herbicide (GH) and the control without herbicide (GC) classifying them as: extremely sensitive (ES= (GH/GC) <0.25), sensitive (S=0.25< (GH/GC) <0.50), low sensitivity (LS=0.50< (GH/GC) <0.75), indifferent (I=0.75< (GH/GC) <1.0) and potentiated (P= (GH/GC) >1). The herbicide promoted a significant reduction in mean germination in 35% (n=6) of the species and 59% (n = 10) were sensitive or extremely sensitive to indaziflam, and only three did not germinate. On the other hand, 29.4% (n=5) showed low sensitivity or indifference to the herbicide, while seed germination was slightly increased by indaziflam to 11.7% (n=2). Pre-emergent indaziflam can be recommended in direct seeding restoration, as only 17.6% (n=3) of the species were inhibited by pre-emergent. However, the effect of indaziflam varies by species and requires further studies to support large-scale use in direct seeding.
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Affiliation(s)
- F B Dutra
- Universidade Federal de São Carlos - UFSCar, Programa de Pós-graduação em Planejamento e Uso de Recursos Renováveis, Sorocaba, SP, Brasil
| | - L S Almeida
- Universidade Federal de Viçosa - UFV, Departamento de Engenharia Florestal, Viçosa, MG, Brasil
| | - G C V Pinto
- Universidade Federal de São Carlos - UFSCar, Graduação em Engenharia Florestal, Sorocaba, SP, Brasil
| | - L F Furlaneto
- Universidade Federal de São Carlos - UFSCar, Graduação em Engenharia Florestal, Sorocaba, SP, Brasil
| | - T K S Souza
- Universidade Federal de São Carlos - UFSCar, Graduação em Engenharia Florestal, Sorocaba, SP, Brasil
| | - E Viveiros
- Universidade Federal de São Carlos - UFSCar, Programa de Pós-graduação em Planejamento e Uso de Recursos Renováveis, Sorocaba, SP, Brasil
- AES Brasil, Bauru, SP, Brasil
| | - I Piotrowski
- Universidade Federal de São Carlos - UFSCar, Departamento de Ciências Ambientais, Sorocaba, SP, Brasil
| | - F C M Piña-Rodrigues
- Universidade Federal de São Carlos - UFSCar, Departamento de Ciências Ambientais, Sorocaba, SP, Brasil
| | - J M S Silva
- Universidade Federal de São Carlos - UFSCar, Departamento de Ciências Ambientais, Sorocaba, SP, Brasil
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