02751nab a2200253 i 4500003000900000005001700009008004100026040001800067072000800085100002600093100001600119100002000135100001300155100001800168245011400186500006000300520179400360650002202154650002302176650001402199650001702213773019002230856007702420BR-BrBNA20230926085958.0230814b2020    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aH60  aCerveira Junior, W.R.  aSilva, A.F.  aCervoni, J.H.C.  aCruz, C.  aPitelli, R.A.  aThe addition of adjuvants on glyphosate enhances the control of aquatic plant Myriophyllum aquaticum (Vell.)   aPublicação on-line; 28 ref.; 9 tables; Summary (En)  a

ABSTRACT
Background: Knowledge about the action of glyphosate alone and
associated with adjuvants in the effectiveness to control aquatic plants is
important in the decision-making on its use.
Objective: This study aimed to evaluate the effectiveness of glyphosate
and five adjuvants in the control of Myriophyllum aquaticum.
Methods: Glyphosate (Rodeo®) at doses of 1.5, 3.5, 5.5, and 7.5 L ha-1
was sprayed alone and associated with Aterbane® BR, Veget’oil®, Dash®
HC, Assist®, and Agral® (0.5% v v-1), in addition to the control, with a
spray solution volume of 200 L ha-1. The effectiveness of control was
evaluated using the scores of a visual scale at 3, 7, 15, 21, 30, 45, and
60 days after application (DAA), regrowth, and dry matter accumulation
at 60 DAA.
Results: The best effectiveness of control of the glyphosate alone was
85% at the dose of 7.5 L ha-1, increasing to 100% when associated with
Aterbane® and Veget’oil®. The control reached 100% for all glyphosate
doses associated with Dash®. Moreover, glyphosate at the dose of
7.5 L ha-1 associated with Assist® provided a 98% control, while
glyphosate doses of 3.5, 5.5, and 7.5 L ha-1 associated with Agral®
provided a 100% control. Glyphosate at doses of 5.5 and 7.5 L ha-1
associated with Dash® and Agral® was more effective in reducing the
regrowth and dry biomass (100%). Thus, glyphosate + Dash® and Agral®
promoted the highest control (above 95%), the lowest regrowth, and the
highest reduction in the dry biomass of M. aquaticum.
Conclusions: The addition of Aterbane® BR, Dash®, and Agral® to
glyphosate improved the effectiveness of control of M. aquaticum and
contributed to reducing the applied herbicide dose. 

Keywords:
chemical management
parrot feather watermilfoil
aquatic plants   aPLANTA AQUÁTICA  aCONTROLE QUÍMICO  aHERBICIDA  aERVA DANINHA0 0886dLondrina-PR : Sociedade Brasileira da Ciência das Plantas Daninhas, 1978o2023-031024tPlanta Daninha (Brazil)x0100-8358; 1806-9681 (on-line)gv. 38 p. 1-8; (2020)wBR2023000854  uhttps://www.scielo.br/j/pd/a/YwtQcKBNYHHrVrTDvDPkcvt/?format=pdf&lang=en