Retention and biological activity of droplets of glyphosate deposited onto plant leaves using a Drop on Demand inkjet printer application system, was examined on pot-grown Brassica napus, Solanum nigrum, Chenopodium album, Silene noctiflora and Echinocloa crus-galli plants. Retention was measured at leaf angles of 0o, 20o, 35o and 45o. Retention was higher on S. nigrum than on B. napus and higher at 0o while only minor differences were observed among 20, 35 and 45oleaf angles. Retentions on the three other plant species were significantly lower than on B. napus and S. nigrum. Retention in admixture with the adjuvant Control was significantly higher on B. napus than with any of the other adjuvants, whereas on S. nigrum no difference was observed between Control and Bermocoll E 230 FQ. Only small differences among the adjuvants were observed on C. album, S. noctiflora and E. crus-galli. The biological performance was not significantly influenced by the adjuvants except with C. album. However droplet volumes varied significantly with a minimum of 0.3 μl in admixture with Control and a maximum of 0.6 μl in combination with Adhere. In conclusion, retention could be optimized by adjuvant selection but the biological activity of glyphosate was not improved.
|Title of host publication||Proceedings ISAA 2016|
|Publication status||Published - 2016|
|Event||11th International Symposium on Adjuvants for Agrochemicals: Creating, Bridging and Sharing the Values of Adjuvant Technology - Hyatt Regency Monterey Hotel and Spa on Del Monte Golf , Monterey, United States|
Duration: 13. Jun 2016 → 17. Jun 2016
|Conference||11th International Symposium on Adjuvants for Agrochemicals|
|Location||Hyatt Regency Monterey Hotel and Spa on Del Monte Golf|
|Period||13/06/2016 → 17/06/2016|