Influence of Adjuvants and Spray Nozzles on Glyphosate Drift

Planta Daninha

Universidade Federal de Pelotas, Pelotas, Brasil¹  Martini, A.T.¹  Pivetta, A.P.¹  Moura, D.S.¹  Camargo, E.R.¹  Avila, L.A.¹  Marchezan, M.G.¹ 

关键词: application technology;    droplet spectrum;    terrestrial spraying;    phytotoxicity;   

DOI  :  10.1590/0100-83582015000200024

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Glyphosate drift can cause environmental impact and also affect crops that are sensitive to this herbicide. The aim of this study was to evaluate the influence of different adjuvants and different nozzles on glyphosate drift in terrestrial applications. The study was conducted in the field, arranged in a factorial design (3 x 9): factor A consisted of three different spray nozzles: one flat spray nozzle (Teejet = XR 110.015) and two air induction flat spray nozzles (Teejet AIXR 110.015 and Teejet TTI 110.015). Factor B was composed of seven adjuvants: Break Thru(r) (0.1% v.v.), Grap' Oil(r) (0.5% v.v.), Grap Super Gun(r) (0.03% v.v.), Iharol(r) (1% v.v.), NP-10(r) (0.075 L ha-1), Dash HC(r) (0.5% v.v.) and Emultec R(r) (0.05 L ha-1). The adjuvants were added to Roundup Transorb R(r) herbicide at 2.16 a.i. ha-1. Moreover, there were two control treatments, one untreated check and another one with application of glyphosate without adjuvant. The distance of droplets off-target, injury caused by drift, volumetric median diameter (VMD), droplet density and volume were evaluated by water sensitive paper cards. The TTI 110.015 spray nozzle resulted in lesser drift when compared to the AIXR 110.015 and XR 110.015 nozzles. The TTI and AIXR nozzles showed lower droplet density and greater VMD compared with the XR nozzle. The use of NP-10(r) and Emultec R(r) adjuvants with spray nozzle XR 110.015 increases drift. Adjuvant Emultec R(r) increases VMD droplets when used with the XR 110.015 nozzle. The use of adjuvants Grap' Oil(r), Grap Super Gun(r), Iharol(r) and Dash HC(r) decrease density derived droplets when generated with the XR 110.015 nozzle.

【 授权许可】

Unknown