Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Svetlana MANHARТ, Todor MANILOV
In the period of 2022-2023, a field experiment was conducted in the Plovdiv region on an alluvial-meadow type of soil. The phytotoxicity of four imazamox-containing herbicides at different application dose rates was evaluated in the sunflower hybrids SY Bacardi CLP and Coloris CL. The experiment includes the following treatment variants: 1. untreated control; 2. Pulsar 40 - 1.25 l ha-1; 3. Pulsar Plus - 1.6 l ha-1; 4. Pulsar Plus - 2.00 l ha-1; 5. Saltus - 0.5 l ha-1; 6. Saltus - 0.65 l ha-1 and 7. Maza 4 SL - 1.25 l ha-1. The highest phytotoxicity was recorded 7 days after treatment with the herbicide Saltus - 0.65 l ha-1 in both sunflower hybrids. The seed yield in all treated variants of the two hybrids in the both crop years was lower than those of the check (untreated controls, maintained weed-free by hand). The highest oil content (41.5%) in the seeds on average for the experimental period is measured by the hybrid Coloris CL treated with Pulsar Plus - 1.6 l ha-1.
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