<abstract xmlns="http://www.w3.org/1999/xhtml">

Adjuvants are used with herbicides to increase their efficacy. In this study, it was demonstrated that the application of 0.1% of the non-ionic surfactant (NIS, Contact) and 0.5 L ha−1 of a crop oil concentrate (COC, Renol) did not improve the efficacy of rimsulfuron on <italic>Amaranthus retroflexus.</italic> In contrast, the same treatments enhanced performance and rainfastnes of rimsulfuron in <italic>Chenopodium album.</italic> Increasing non-ionic surfactant concentration to 1 L ha−1 increased rimsulfuron performance around 10-fold for <italic>A. retroflexus</italic> compared to around 3-fold for <italic>C. album.</italic> The same treatment reduced 12-fold the rainfastness of rimsulfuron on <italic>A. retroflexus</italic> while improving 2-fold the rainfastness of rimsulfuron on <italic>C. album</italic>. Measured ED50 and ED90 doses of rimsulfuron indicated that the addition of the 0.2 L ha−1 of NIS improved the recommended (60 g a.i. ha-1) and the reduced (30 g a.i. ha−1) dose effect of rimsulfurom in potato crop in the field. The highest potato yield was recorded (60 tons per ha) when 60 g ai. ha−1 of rimsulfuron was applied at three growth stages [leaf development (S1) + vegetatively propagated organs (S4) + development of tuber (S7)] of the crop without using a NIS; not significant differences were measured when the same dose of rimsulfuron was applied at the three (S1, S4, and S7) and two (S1, S4) growth stages with NIS.
</abstract>

Adjuvants are used with herbicides to increase their efficacy. In this study, it was demonstrated that the application of 0.1% of the non-ionic surfactant (NIS, Contact) and 0.5 L ha−1 of a crop oil concentrate (COC, Renol) did not improve the efficacy of rimsulfuron on Amaranthus retroflexus. In contrast, the same treatments enhanced performance and rainfastnes of rimsulfuron in Chenopodium album. Increasing non-ionic surfactant concentration to 1 L ha−1 increased rimsulfuron performance around 10-fold for A. retroflexus compared to around 3-fold for C. album. The same treatment reduced 12-fold the rainfastness of rimsulfuron on A. retroflexus while improving 2-fold the rainfastness of rimsulfuron on C. album. Measured ED50 and ED90 doses of rimsulfuron indicated that the addition of the 0.2 L ha−1 of NIS improved the recommended (60 g a.i. ha-1) and the reduced (30 g a.i. ha−1) dose effect of rimsulfurom in potato crop in the field. The highest potato yield was recorded (60 tons per ha) when 60 g ai. ha−1 of rimsulfuron was applied at three growth stages [leaf development (S1) + vegetatively propagated organs (S4) + development of tuber (S7)] of the crop without using a NIS; not significant differences were measured when the same dose of rimsulfuron was applied at the three (S1, S4, and S7) and two (S1, S4) growth stages with NIS.

Effects of adjuvants on the effectiveness and rainfastness of rimsulfuron in potato

Department of Plant Production and Genetics, Faculty of Agriculture and Natural Resources

Hellenic Plant Protection Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

Adjuvants are used with herbicides to increase their efficacy. In this study, it was demonstrated that the application of 0.1% of the non-ionic surfactant...

Effects of adjuvants on the effectiveness and rainfastness of rimsulfuron in potato

Published Online: Jan 22, 2024

Page range: 35 - 48

Received: Jan 15, 2021

Accepted: Dec 26, 2023

DOI: https://doi.org/10.2478/hppj-2024-0003

Keywords
chemical control, dose-response, growth stages, herbicide efficacy, surfactant

© 2024 M.T. Alebrahim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effects of adjuvants on the effectiveness and rainfastness of rimsulfuron in potato

Published Online: Jan 22, 2024

Page range: 35 - 48

Received: Jan 15, 2021

Accepted: Dec 26, 2023

DOI: https://doi.org/10.2478/hppj-2024-0003

Keywordschemical control, dose-response, growth stages, herbicide efficacy, surfactant

© 2024 M.T. Alebrahim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
chemical control, dose-response, growth stages, herbicide efficacy, surfactant