Study

Chemical control of Myriophyllum aquaticum

  • Published source details Negrisoli E., Tofoli G., Velini E., Martins D. & Cavenaghi A. (2003) Uso de diferentes herbicidas no controle de Myriophyllum aquaticum. Planta Daninha, 21, 89-92.

Actions

This study is summarised as evidence for the following.

Action Category

Parrot’s feather: Use of herbicides - 2,4-D

Action Link
Control of Freshwater Invasive Species
  1. Parrot’s feather: Use of herbicides - 2,4-D

    A small, replicated, controlled, laboratory study conducted in 1999 in Brazil (Negrisoli et al. 2003) found that the application of the herbicide 2,4-D above a certain concentration led to a greater reduction in growth in parrot’s feather Myriophyllum aquaticum than the application of the herbicides diquat, glyphosate or imazapyr. Thirty-six days after application, control of parrot’s feather plants by 2,4-D (4–100%, visual assessment with 0% corresponding to no control and 100% to complete control) was higher than control by diquat (53–54%) in 11 out of 12 comparisons, control by glyphosate (34%), and control by imazapyr (8.5%). However, the application of 2,4-D at a concentration of 167 g/ha led only to 4% control. Fifteen parrot’s feather shoots were propagated in 120 l containers filled with water. Herbicide concentrations tested were 167, 335, 670 and 1340 g/ha for 2,4-D, 102 and 204 g/ha for diquat, 3360 g/ha for glyphosate and 250 g/ha for imazapyr. Control in the context of the visual assessments is not clearly defined.

    (Summarised by: Ricardo Rocha)

Output references
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