First report of injuries associated with triclopyr herbicide drift in grapevines

Abstract

In the southern region of Brazil, close proximity of vineyards to soybean areas is common, and glyphosate is used frequently to allow for the control of weeds. However, the continuous use of this chemical has accelerated the process of selection for resistant species such as horseweed (Conyza sp.), thus leading to the search for alternative herbicides such as triclopyr to control this weed. To the best of our knowledge, this is the first report detailing injuries associated with triclopyr drift in grapevines in Brazil, in the Northern region of Parana state, that can result in crop losses that were previously uncharacterized. In this report, the primary symptoms associated with the drift of triclopyr in grapevines are described. Additionally, the major implications of this process regarding vine development along the next crop seasons are explored, and the primary measures to prevent these injuries are discussed.

Keywords

• Viticulture
• Table grapes
• Herbicide
• Application technology
• Vitis vinifera L.