Herbicides selectivity on seedlings of White Leadtree (Leucaena leucocephala)

Autores

  • Roque Carvalho Dias Programa de Pós-graduação em Proteção de Plantas – Faculdade de Ciências Agronômicas da Universidade Estadual Paulista “Júlio de Mesquita Filho” (FCA/UNESP), Botucatu, SP, Brasil. http://orcid.org/0000-0001-5433-5373
  • Diego Munhoz Gomes
  • Vitor Muller Anunciato
  • Leandro Bianchi
  • Caio Antonio Carbonari
  • Edivaldo Domingues Velini

DOI:

https://doi.org/10.15361/1984-5529.2020v48n1p56-66

Resumo

Difficulty in controlling weeds has hindered the success of vegetation recovery projects using white leadtree (Leucaena leucocephala) seedlings in degraded areas. The use of herbicides is indispensable to mitigate damage and make these areas viable. Therefore, this study evaluated the selectivity of pre- and postemergence herbi­cides on white leadtree seedlings. Two experiments were carried out in a greenhouse in a randomized block design with four replications. Pre-emergence treatments (g ha-1) were: atrazine (3,500.00), chlorimuron-ethyl (20.00), clomazone (900.00), flumioxazin (125.00), indaziflam (100.00), isoxaflutole (262.50), pendimethalin (1,150.00), sulfentrazone (500), and S-metolachlor (1,920.00), in addition to a control (without herbicide). The second experiment consisted of the following postemergence treatments (g ha-1): atrazine (2,500.00), chlorimuron-ethyl (15.00), clomazone (54.00), flumioxazin (20.00), glyphosate (396.25), haloxyfop-methyl (49.88), indaziflam (75.00), isoxaflutole (187.50), pendimethalin (1,150.00), and S-metolachlor (1,440.00), in addition to a control (without herbicide). Phytotoxicity, plant height, and root collar diameter were assessed at 3, 7, 14, 30, and 60 days after application (DAA). Shoot dry matter was assessed at 60 DAA. Herbicides atrazine, indaziflam, and isoxaflutole, applied in pre- and postemergence, in addition to glyphosate, negatively influenced all evaluations, being considered nonselective for white leadtree plants. Herbicides with selectivity, regardless of the application method, were chlorimuron-ethyl, clomazone, flumioxazin, haloxyfop-methyl, pendimethalin, sulfentrazone, and   S-metolachlor.

Biografia do Autor

Roque Carvalho Dias, Programa de Pós-graduação em Proteção de Plantas – Faculdade de Ciências Agronômicas da Universidade Estadual Paulista “Júlio de Mesquita Filho” (FCA/UNESP), Botucatu, SP, Brasil.

Engenheiro Agrônomo graduado pela Universidade Federal de Viçosa (2016). Mestre em Agronomia (Proteção de Plantas), pela Faculdade de Ciências Agronômicas Universidade Estadual Paulista Júlio de Mesquita Filho, Campus de Botucatu/SP (2016). Doutorando em Agronomia (Proteção de Plantas), pela Faculdade de Ciências Agronômicas, Universidade Estadual Paulista Júlio de Mesquita Filho, Campus de Botucatu (2018). Participou de intercâmbio acadêmico na Universidade de Caldas, Colômbia (2012-2012) e trainee do programa "Minnesota Agricultural Student" pela University of Minnesota (2014-2014). Têm experiência em Agronomia, com ênfase em Matologia, principalmente no manejo integrado de plantas daninhas e impactos de herbicidas no solo e planta.

Publicado

19/03/2020

Edição

Seção

Fitotecnia - Crop Production