Effectiveness of weed control by tank mixture of herbicides aclonifen and prometryn on sunflower crops

Vitalii Yukhymuk, Mariia Radchenko, Zhanna Guralchuk, Olena Rodzevych, Mariia Khandezhyna, Yevgeniy Morderer

Abstract: This work is devoted to the elaboration of herbicides composition that would provide effective protection of sunflower (Helianthus annuus L.) crops from weeds, as well as it would be an effective means of preventing emergence of herbicide-resistant weed biotypes. For this purpose, the interaction effects, weed control efficiency, and crop selectivity had been studied in greenhouse experiment and field trial with tank mixtures of herbicide inhibitor of carotenoid synthesis aclonifen and herbicide inhibitor of electron transport in the photosystem 2 of chloroplasts prometryn. The herbicides aclonifen and prometryn were applied at different application rates separately and in the mixtures to the soil before the emergence of plant seedlings. It has been shown that in the mixtures of herbicides aclonifen and prometryn the interaction is mainly additive. The mixture of herbicides is selective for sunflower in the range of application rates of aclonifen 1.8–2.4 kg ha-1 and of prometryn 1–1.5 kg ha-1. High efficiency of weed control by the mixture was achieved with the aclonifen and prometryn application rates, respectively, 1.8 and 1.5 kg ha-1, or 2.4 and 1.0 kg ha-1. The effectiveness of weed control in field conditions with mixtures of herbicides aclonifen and promethrin at the specified rate ratio, was not inferior to the complex herbicide Primekstra TZ Gold at the recommended application rate of 4.5 L ha-1.

Keywords: aclonifen; Helianthus annuus L.; interaction; prometryn; resistance; tank mixture

Date published: 2023-06-28